Wishvilles Classic
Automobile Library
Page 1: ... i MIDGET Series TO D Series TF WORKSHOP MANUAL Wishvilles Classic Automobile Library ...
Page 2: ...odels should be understood to read later Seri as TO models and all Series TF models unless otherwise stated Amend ments to the manual are on Iy made by th e issue of revised sheets or additio naI sheets for insertion at the end of each section It is therefore of the utmost importance to refer to the end of each section before carrying out any work on the vehicle The part number of this manual whic...
Page 3: ...I 111111 fl _ It tt _ 1111111 11111 un 1111 1I lt Hettl_ttln II tt 1I1 ttHll1lllltll 2 M G Midget Issue5 H E 942994 55 Wishvilles Classic Automobile Library ...
Page 4: ... Engine Fuel System IgnitJon Equipment Cooling System SerIes TO Cooling System Series TF Flywheel and Clutch Gearbox Propeller Shaft Rear Axle Rear Road Springs Steering Gear Front Suspension Hydraulic Dampers Braking System Electrical Equipment Wheels and Tyres Lubrication Special Tools Body Chassis Frame RepaIrs M G Mklpt Issue J H E B2966 1 l54 Section A B C o DO E F G H K L M N o P Q R S 3 Wis...
Page 5: ...nimum diameter for regrind 1 722 in 43 75 mm ConnectIng rod length between centres 7 008 in 178 mm Connecting rod type of bearing Shimless steel backed white metal lined Connecting rod side clearance 004 in to 006 in 10 mm to ISmm Connecting rod diametrical clearance 0005 in to 002 in 011 mm to 056 mm Number of crankshaft bearings Three Type of main bearings Shlrnless steel backed whlte rnetal lln...
Page 6: ... O C Inner 31 lb at 1 753 In 14 06 kg at 4 453 em Total 93 lb Outer 62 lb at 1 847 in 28 12 kg at 4 692 em 42 18 kg Inner 43 lb at 1 B8 In 19 5 kg at 3 678 crn JTotal 123 lb Outer 80 lb at 1 532 in 36 29 kg at 3 89 em 55 79 kg Engines up to No XPAG TD2 24I15 Inlet and exhaust valve working clearance hot 019 in 4S mm Engines from No XPAG TD2 24 I16 Inlet and exhaust valve working clearance hot 012 ...
Page 7: ...r O with side members parallel to road Nil 90to 10 0 full bump Front 47 in 203 m Rear 50 In 1 27 rn 31 ft 3 in 9 525 m 7 ft 10 In 2 388 m 50 15 181b per sq In 1 27 kg cm 2 Semi floating Hypold 8 41 8 39 or 9 4J By spacers and special fixtures Lockheed hydraulic two leading shoe front 9 in dla Ferodo MR 19 8 75 in X 1 5 in X 187 in 22 22 em X 3 81 em X 47 crn 8 75 in x 1 5 In x 187In 22 22 em X 3 8...
Page 8: ...ne No 14948 IO pints 12 6 U S pints 5 96Iitres Ii pints 1 5 U S pints 71 litre 21 pints 2 7 U S pints 1 3Iitres 12 pints 14 4 U S pints 6 8 lttres I pint 1 2 U S pints 57Iitl e 12t gallons 15 U S gallons 57Iitres 145 in 3 683 m 58t in 1 489 m 53 in 1 346 m 6 In 15 24 crn 18 ewt 2 072 lb 941 kg 22 cwt 2 464 lb 1120 kg Cylinder head stud nuts Connecting rod big end bolts to next split pin hole Main ...
Page 9: ... the exception of the dipping switch fitted to later models At the top left is the lighting swltch controlling the lamps In the centre of which is the key operated ignition switch Turning the switch clockwise switches on the ignItion and the ignition warning light at the bottom right hand corner of the panel To the immediate right of the lighting swItch is the combined horn push and headlamp dimmi...
Page 10: ...ive in the accepted manner To the right of the sockets is the starter switch which is of the pull type It must always be operated smartly and decisively over Its full range of movement At the bottom right hand corner of the Instrument panel are two warning lights The one on the extreme right is the ignition warning lamp which glows when the ignition is switched on until the engine runs at sufficie...
Page 11: ...nd front sldescreen on top of It as shown with Its flap folded under and the stays at opposite ends as illustrated The right hand rear sidescreen Is then placed on top of the other two as shown In 2 tucking Its front bracket underneath that of the left hand front sldescreen so that It lies flat upon the other taking up the minimum amount of room 10 This Is followed by the left hand rear stdescreen...
Page 12: ...d The four steps for correctly folding the hood are here shown Neverfold the hood when Itls damp or wet Always wait till It dries Before folding the hood back release the press buttons at each side Make sure that no hood material Is trapped between the hood sticks and that the rear panel of the hood Is pulled well forward as at I Then fold the hood sticks right down and gently pull the hood materi...
Page 13: ...xture control to the completely Off position as soon as possible without causlng the engine to splutter Blanking off the radiator will assist in warming the engine in cold weather but never run the car with the radiator completely masked CHASSIS AND ENGINE NUMBERS When in communication with the Company or your Dealer always quote the type of model and the chassis and engine numbers The registratio...
Page 14: ...1 1 1 1 1 t I l l l l l l l l rf I 1 f ii i I i t t i t i it t t L TIlE M G MmGfiT fSeries TD ENGINE LONGITUDINAL SECTION 111441 11 11 111111111111111 1 1 I i i I i I i t t i t I t J M G Midget Series TO Issue 2 E U34S ljS3 13 Wishvilles Classic Automobile Library ...
Page 15: ...ssue 2 E 79345 1 53 EARLY MODELS WITH THROW AWAY FILTO SEE PAGE A 30 FOP LATER MODEL 1l1111111111111111 tll I i TRANSVERSE SECTION I THE M G MIDGET Series TD ENGL E _ _ _II_ IIII II If II 14 Wishvilles Classic Automobile Library ...
Page 16: ...eering swivel pins 2 on steering tie rod arms Models with left h and steerlng have an extra grease nipple on the clutch and brake pedal shaft See that radiator is full of water See Section 0 1 Test tyre pressures See Section 0 1 Every 1 000 miles 1600 km Inspect oil level In gearbox and rear axle Replenish if necessary to Ref B page P l Apply grease gun filled with grease Ref page P 2 to all greas...
Page 17: ... with the result that t here Is a very co nslderabIe risk of bu rsti ng eithe r the rad Iator or the cylInde r block by the pressure generated As a precautionary measure the water shouldbe drawn from the radiator before the car is stored for the night or better still an anti freezing solution may be used We recommend the use of Smiths Bluecol Shell Snowfla ke or Filtrate Nevafreze non corrosive an...
Page 18: ... should now be placed in front of the first one again with the attachment lugs facing towards the front of the car but with the canvas part up against the right hand panel as in Fig 2 material of which the screens are made unnecessary Insert the right hand front stdescreen as in Fig 3 with its lugs pointing down wards and its flap folded under towards the rear of the car Make sure that it is inser...
Page 19: ...y means of the two press studs 18 FOLDING THE HOOD The hood on later models Is fitted with an extra hood stick In the frame at the front end This however does not affect the foldlng procedure and the Instructions given 0 page II may be followed when performIng this operation M G Midget Series TD Issue I E 7 45 1 53 Wishvilles Classic Automobile Library ...
Page 20: ... 5 000 r p m DATA II TF U XPAGfTF to Chassis No 6500 XPEG TF from Chassis No 6501 Four XPAGfTF 1250 c c 761 cu in 66 5 mm 2 618 tn 90 mm 3 5 043 ln 8 1 I 10 97 h p 57 at 5 500 r p m 8 to I Thermo slphon pump and fan assisted Length 4fe in 10 95 cm Diameter Irin 3 8 cm Length 21 in 5 71 ern Diameter t in 2 86 cm 010 In 50 mm 040 In 1 00 mrn 1 3 4 2 0021 In to 0029 in 056 mm to 071 mm 006 In to 010 ...
Page 21: ...4 kg at 04 04S3 em j Total 14 35 b Outer 73 25 lb at 1 47 In 33 23 kg at 04 692 crn 51 87 kg Valve spring pressure s open Inner 55 lb at 1 438 in 24 95 kg at 3 678 crn Total 150 lb Outer 95 lb at 1 532 In 43 09 kg at 3 89 crn 68 04 kg Inlet valve opens piston traverse 009 in 23 mm Inlet valve working clearance hot 012 in pO mm Exhaust valve working clearance hot 012 In 30 rnm Valve guides Removabl...
Page 22: ...a In 1 224 rn Rear SOH In 1 29 m 31 ft 3 in 9 515 rn 7ft 10 In 2 388 m 5 50 15 181b per sq in 1 27 kg cm 2 Seml floatlng Hypold 8 39 4 875 I Alte rnattve ratios 4 S5 I and 5 125 I By spacers and special fixtures Lockheed hydraulic two leading shoe front 9 ln dta Ferodo DM 7 8 75 In X 1 5 In X 187 in 22 22 em x 3 81 em X 47 crn 8 75 in X 1 5 in X 187 In 22 22 em X 3 81 em x 47 crn Twelve per lining...
Page 23: ...ight unladen Weight laden and with two passengers 147 In 3 74 m 59 in 1 518 m 52lln 1 34 m 61n 15 24 em 31 ft 3 in 9 525 rn 31 ft 3 In 9 525 m 17 cwt I qr 1 932 lb 878 kg 22 ewt 2 464 lb 1120 kg SOD lb jtn 5 75 kg m 750Ib in 8 6 kg 1m TORQUE SPANNER DATA 600 Ib in 6 9 kg m up to Engine No XPAGfTf 31727 500 Ib in 5 75 kg m from Engine No XPEG Tf 31728 320 lb jtn 3 7 kg m Cylinder head stud nuts Con...
Page 24: ...ture and turn 90 In an anti clockwise direction to lock Gradually return the Control to the off position as rapidly as the warming engine will allow The starter control occupies the lower right hand corner of the panel It Is marked S and should be operated smartly and decisively over its full range The bottom left hand centre control knob is marked L II and is the lamp switch When it is pulled out...
Page 25: ...rates when the driver s arm is worki ng WARNING LIGHTS There are three warning lights in the top centre of the panel The centre one is the ignition warnIng lIght red The left hand one is the fuel warning light indicating that the fuel supply has fallen to approxi mately two gallons 9 1 litres and requires replenishing at the first opportunity blue The right hand warning light provides visual indic...
Page 26: ...eir compartment Start with the left hand front sidescreen and stow it face downwards with the top edge against the rear of the stowage compartment and the front lower point against the left hand wheel arch I PIace th e right hand front sidescreen on top of th e left hand one with its face slde uppermost the top edge against the rear of the stowage space and its rear edge against the right hand whe...
Page 27: ...d Its front edge against the right hand wheel arch 3 Finally Insert the right hand rear sldescreen with Its chromium plated side uppermost and its front edge against the left hand wheel arch 4 The screens are finally stowed as shown below 5 FOLDING THE HOOD As for M G Midget Series TO M G Midget Issue I H E 8296 1154 Wishvilles Classic Automobile Library ...
Page 28: ... Removal and replacement of the pistons and connecting rods Dismantling and reassembling the piston and connecting rod FittIng gudgeon pins Removal and replacement of piston rings Piston sizes and cylinder bores Removal and replacement of carburetters Removal of the exhaust and Inlet manifold Removal and replacement of the water pump Removal of the timing chain case Replacement of the timing chain...
Page 29: ... 2B _c 7 30 29 107 31 EX P PVftiWfYJJl4PA Y WIi IN A PlJMP MOlJNT M THE ENGINE COMPONENTS 12 b 12 2 Ittttll1111 111 I 5 l 0 II f UI l o i SID Vi ii I o 3 a lICl Wishvilles Classic Automobile Library ...
Page 30: ...t breather pipe bracket 74 Bo t sump short 124 Wing nut air cleaner stud 1 25 Cllp brnther pipe 75 Bolt sump Iong 125 Breather hose aJr cleaner 26 olt breather pipe cUp 76 Dipstick 126 Clip breather hose 1 27 Nut clip bolt 77 Suction filter assembly 127 Pipe to air cleaner 1 28 5prlng oll fllter e by pass 78 Filter gauze 128 joint pipe to carburetter i 19 Ball oH f llter by pass 79 Spring oil uctl...
Page 31: ...crew with a lock washer Pistons are made of alumInium ailoy and fitted with tWO compression rings and one oil control ring The camshaft Is supported in three renewable bearings pressed into the block and Is driven from the crankshaft by means of an endless duplex chain which Is automatically maintained at the correct tension by a spring loaded plunger Oil is fed to each bearing from the Internal o...
Page 32: ...m the surplus oil exudIng from the bearing A feed is also taken from the front main bearing to the automatic chain tensioner The camshaft front bearing has a forward leak passage to the camshaft chain wheel thrust face and from there passes through three diagonal holes in the gear wheel boss to the inside of the wheel rim where centrifugal action forces it through radial holes onto the chain links...
Page 33: ...lng on the first set screw below the crankcase and sump joint line In breaking the sump Joint avoid damaging the gasket or it will be necessary to fit a new one when the sump is replaced The sump can now be cleaned and dried When cleaning the sump use a stiff brush never use rag Replacement of the sump Is carried out In the reverse manner to that detailed for removal Note If it is necessary to fit...
Page 34: ...ilter bowl and element on later models R emove the eight bolts securing the pump to the cylinder block This will release the cover Lift off the cover rom the pump body This will release the driven gear which can easily be withdrawn R emove the pump by gently tapping the side of the body and withdrawing it downwards Screw a sultable extraetor into the end of the driven gear shaft and withdraw it fr...
Page 35: ...fibre washer for the plug are correctly replaced and the fibre washer Is in good condition If there is any doubt as to its condition replace it with a new one Pump gears Cover DrIve gear and shaft Driving gear shaft Seating sleeve By pass valve components Fig A 7 The oU pump dismantled The pump body and cover 11iustrated are those fitted prior to Engine No 4224 Later engInes have a pump body incor...
Page 36: ...o be in a worn condition a service re ground crankshaft complete with main and big end bearings as supplied from the Works should be fitted See Section A H The big end bearings are located in position by a small tag on one side of each half bearing and the bearings are fitted so that the tags come on the same side of the bearing housing as shown in the illustra t ion Main bearings are located in p...
Page 37: ...s and the end bearing faces of the rockers Remove the plugs from each end of the shaft so that the oilways may be cleaned Reassembly and replacement Is a reversal of the above procedure but care must be taken to replace rockers and springs correctly on the shaft Section A 9 REMOVAL AND REPLACEMENT OF THE CYLINDER HEAD Drain the water system by opening the tap at the bottom of the radiator and the ...
Page 38: ...e cylinder head The push rods should next be fitted after which the rocker gear is reassembled Whenever the head has been disturbed or the valves have been ground in or otherwise disturbed it is necessary to check the tappet adjustment and make sure the clearances are adequate these of course will finally be ad usted after the engine has been completely reassembled and run for a short period Now f...
Page 39: ... be a thumb push fit for three quarters oftheir travel to be finally tapped home with a raw hide mallet For this operation the piston and gudgeon pin must be cold Gudgeon pin bores in the piston should not be reamed out because oversize pins are not available or permissible Gudgeon pins must be fitted by selection Section 1 1 REMOVAL AND REPLACEMENT OF THE PISTON RINGS If a speclal piston ring exp...
Page 40: ... under the M G reconditioned engine scheme are limited to two oversi z es 020 In graded In 4 sizes as the standard grading tQ40 tl n U The actual sizes of these pistons and bores are prcvlded In the following table Pisto n Mark ng Suiuble for Bore SI te In mm STANDARD PISTON SIZES To suit It STD bore 2 6181 66 500 2 6185 66 510 Production engInes wIth bores To suit 0005 bore 2 6186 66 513 102 In o...
Page 41: ...celerator lever Remove the four bolts holding the carburetters to the Induction manifold and lift the carburetter assembly clear of the engine Seetion A 17 REMOVAL AND REPLACEMENT OF THE WATER PUMP Drain the cooling system through the radiator and cylinder block drain taps and release the dynamo on its mountings so that the driving belt may be Withdrawn U TF Remove the valance tie bar Detach the r...
Page 42: ...ft and camshaft respectively by single keys There is therefore only one position in which the sprockets can be fitted to the camshaft and crank shaft It will be noticed that the timing chain has two white links and each of the sprockets has one tooth marked T Between the white links are thirteen black ones on one side of the chain and fifteen black links on the other The thirteen black and the two...
Page 43: ... the cylinder block and unscrew them taking care to hold the assembly against the chain to overcome t he tension of th e sprlng Before replacIng examine the bore ofthe feed block for wear thls should be 43 In 004 in II mm 1 mm r and make sure that the oHway Is clear Look for any wear on the chain tensloner the out side diameter of the stem should be 43 In 004ln to 012 In II mm 1 mm to 3 mm Finally...
Page 44: ...entre bearing make sure that the camshaft is still free to rotate i e that the dowel bolt does not bottom in its hole and so squeeze the bearing The whole of this operation Is more easily carried out with the engine out of th e car and the cran kshaft flywheel pistons and connecting rods removed Do not forget to rewire the two bearing dowel bolts M G Midget Issue 3 H E 82966 1154 Seetion A 26 CAMS...
Page 45: ...re it has not changed Section 1 28 REMOVING AND GRINDING THE VALVES The valve springs are secured by cups and split conical cotters In order to remove a valve the head must be removed as indicated in Section A 9 placed face downwards on the bench with a block of wood filling the combustion space so that the valve head is resting on it If the spring is then depressed the collets are exposed and may...
Page 46: ...55 seat It Is necessary to carry out the grinding opera tion until a dull even matt surface free from blemish Is prod uced on the valve seat and face If the valve seat which Is at 30 Is found to be wide it should be reduced with a 15 cutter to a width of 2 mrn 080 ln for the exhaust and 1 1 mm 043 In for the inlet seats On completion the valve seats and ports should be cleaned thoroughly with para...
Page 47: ... 24 rnm on early engJnes and 24 5 mm on later engines See Section A 30 Undo the 011 pressure gauge pipe at the cylinder block and detach the revolution counter drive from the rear end of the dynamo Disconnect the dynamo leads noting that the green wire on the dynamo goes to the field terminal F Remove the two bolts holdl ng the front engl ne mountIng to its rubber block Take off the outer nut on t...
Page 48: ...ixing bolts Take out the fiXing bolts Pull off the flywheel with asuitable extractor taking care not to damage the locati ng dowels Replacement is a reversal of this process Check the flywheel for accuracy It should be no more th an 0021n 05 mrn out of truth at any point when rotated with a dial gauge in contact with the cIutch face Section A 33 REMOVAL AND REPLACEMENT OF CRANKSHAFT Engine out of ...
Page 49: ... 1 i I I lltl _ s r 1 1 I I i I r 1 t I 57 58 INTERNAL ENGINE eJOMPONENTS SHOWING THE LATER ROCKER SHAFT COMPONENTS U C tTP WW r l o I o I c OQ VI L _ _ __ _ _ _ _ 11_ _ Wishvilles Classic Automobile Library ...
Page 50: ...prl ng medlum outer 13 Gudgeon pin 39 crrdlp camshaft rear 66 Spacer SprinC 5hort front and rear 14 Con netting rod with tap and bolts 40 Thrust plate camshaft 67 Spring cllp rotker shaft 15 Bolt onnectlng rod cap 41 BearJng camshaft front 68 Wuher spring clip 16 Nut conneetJnll rod cap bolt 42 Bearlng camsllaft rear 69 Valve rocker with bush Nos I and 8 valves 17 Clamp strew gudgeon pin 43 Bearln...
Page 51: ... the bearings particularly when the oil Is warm and fluid This will cause ad rop In the pressure recorded on the gauge as compared with that shown when the bearings are in good order Note The automatic release valve deals with any excessive oil pressure when the engine and 01 are cold Cold running and unnecessary use of the mixture control are often causes of serious all dilution by petrol and a c...
Page 52: ...ear engine mounting housed in a cradle on the chassis frame cross member A rebound rubber is also provided to limit the upward movements The exhaust system Is rigidly attached to the exhaust manifold and the side of the gearbox but attached to the chassis frame by a flexible mounting This allows the exhaust system to float with the power unit Removing the control link The engine control link is re...
Page 53: ...d through being too long or too short It Is most important therefore that it should be adjusted as explained above so that It carries no load to ensure the minimum of engine vibration A o Fig A l I Showing engi ne control Iink and rront engine 5U pport rubbe r A Slotted nut J Adjuster B Washer K Link rod e Cup L Cup D Rubber M Rubber E Rubber N Rubber F Cup O Cup G Link rod P Washer H Locknuts Q S...
Page 54: ...carburetters d Air leak in induction system e Check adjustment of carburetter con trol If engine starts but runs erratically A Check the follOWing ignition polnts I Loose high tension leads to sparking plugs 2 Incorrect setting of plug points 3 Damaged plug or moisture on plugs 4 Loose connection on battery or In Ignition circuit S Faulty high tension leads 6 Battery charge low 7 Battery connectio...
Page 55: ...ers not properly synch 1 0nised B Check the following mechanical points I Sticking valves 2 Incorrect valve clearance 3 All leak in induction system CHECKING METHODS Fig A 32 Checking the connec ting rod or alignment The indicator dial should give the same reading at each end o the test bar clamped in the llttle end Fig A 33 Testing the connecting raj or twist The test bars 5 hould rest on all our...
Page 56: ...er engine breather pipe as indicated in Fig A H Later prod uetion engines have this modification Incorporated as standard It 11 I 11111 1 tllil t i I e HOLE 32 D1A 1I1111 i Fig A 34 The location of the restrictor ln the air cleaner breather pipe 11 llIllIt 11111 IlIllllIllIllI IIl1l1ltIUIII FII A 3S The lubrication system of later engines commencing t Engine No_ 14224 In which a renewable element ...
Page 57: ...DGET Series m ENGINE TRANSVERSE SECTION OF ENGINES FROM No 4224 ONWARDS M G Midget Series TD Issue 2 E 8152 1 d 1t lflllI f It I I 1111111111111111 1111111111111111 111111111 1 A 30 A Wishvilles Classic Automobile Library ...
Page 58: ...PRIMING PLUG _ 4 RELIEF VALVE SPRING WASHER Iii COVER Pl UG SeetioD A 42 CYLINDER HEAD AND CYLINDER BLOCK MODIFICATIONS Starting at Engine No XPAGfTDfJ7969 a modified cylinder block Part No SA2404 11 is fitted in conjunction with cylinder head gasket Part No X24481 This gasket is illustrated in Fig A 37 and it will also service all engines prior to that quoted above and will be issued against all ...
Page 59: ...he valve clearance has been altered from 019In 48 mm to 012 in 39 mm The new camshaft is Part No 68553 and is fitted In conjunction with a new cylinder head cover assem bly Part No SA240713 and a new valve clearance plate Part No 16TI79 A 32 Fig A 37 The modified gaskets They can readily be identified by the difference in the shape of the water passage apertures Seetion A 45 MODIFIED OIL GAUGE PIP...
Page 60: ... I f J TRANSVERSE SECfION I I THE M G MIDGET Series TF ENGINE It 11 II f i I t i i i j i u J I I I I i I i t i i I t i I i f I I M G Midget Issue I H Be E 82 6 1 5 4 A 33 Wishvilles Classic Automobile Library ...
Page 61: ...ll II II I 11 II II I ll 111_ 110 110 11 11 0 _ 110 11 11 11 A i THE j I G MIDGET Series TF ENGINE LONGITUDINAL SECTION A 34 11 JII 1 i i 1 i t I 1 t t t t I I M G MIdget Issue r H E 82966 1 54 Wishvilles Classic Automobile Library ...
Page 62: ...tters Section No B 14 Removing the TF fuel tank Section No B 15 Late type fuel pumps B SeetiOD B I TO REMOVE THE FUEL TANK Take off the spare wheel Slacken off the tank retaining straps at their lower ends and undo the four chromium plated dome nuts at the top of the spare wheel carrier Remove the bolts from the Inside of the car Drain the tank detach the fuel line and remove the damps at the lowe...
Page 63: ...rewed th rough the centre of the arrnatu reo to which the diaphragm Is attached and It passes through the magnet core to the contact breaker which Is located at the other end A volute spring 28 is Interposed M G Midget Issue 3 H E 892n IOjS4 8 9 10 II 13 12 29 9 Diaphragm assembly 10 Armature guide rollers II Retaining plate 12 Filter 13 FIbre washer tilick orange 14 Filter plug IS Steel armature ...
Page 64: ... armature and diaphragm back forclng petrol through the delivery valve at a rate determined M G Mldlet Serle TD Issue 2 E 79 45 1 53 by the requirements of the engine As soon as the armature gets near the end of this stroke the throw over mechanism again operates the points again make contact and the cycle of operations Is repeated Section 0 4 TO DISMANTLE AND REASSEMBLE THE FUEL PUMP When a pump ...
Page 65: ...n reassembling see that all parts are clean The valves 4 and 7 should be fitted with the smooth side downwards Care should be taken that the valve retaining elip 3 in the delivery valve cage 5 Is correctly located in its groove The thin hard red fibre washer 6 should be fitted under the valve cage and a thick orange coloured one 2 above the valve cage and also above the filter plug The washer on t...
Page 66: ...th should be employed to check the correct setting of the armature must the spring washer be omitted or the assembly shortened in any way Any attempt to do so is likely to lead to breakage of the pedestal when the nut retaining the cover in posltlon is tightened up The armature return spring should be fitted with its larger diameter towards the coil and its smaller diameter resting against the arm...
Page 67: ...se of a glass tube and rubber connections between the pump and the test tank is advised When the pump Is switched on it should prime Itself promptly and the fuel which is normally used for testing should rise In the glass container until it flows over the top of the pipe having the In 4 mm hole drilled in It 2 in 5 crn below the top of the pipe Ifthe output of the pump is not up to normal the in 4...
Page 68: ...complete rig Is obta lnable from the Service Paru Department of The M G Car Co Ltd or your local Distributor of the terminal The voltage of the pump can always be Identified by the colour of the sleeving on the coil ends this being red for 12 volt and green for ovolt Note There are three important pOints which are repeatedly overlooked by operators These seriously affect the functioning ofthe pump...
Page 69: ...ot drop out Pump noisy If the pump becomes noisy and works rapidly it is usu ally an indlcatlon that there is an alr leak 0 n the suction side of the pump Check the level of the fuel in the tank and see that it is not too low 8 8 The simplest way to test for air leakage is to dis connect the fuel pipe from the carburetter and place its end in a glass Jar approximately I pint or half a litre and al...
Page 70: ...e air cleaner and intake elbow and then make quite sure the carbu retter pistons are free and that the jets are correctly centred explained under Section B II It is also necessary to make sure that the mlxtu re and throttle Interconnection adjust ing screw is dear of the rocking lever anvil when the mixture control knob on the instrument panel is pushed right home Next one of the clarnpl ng bolts ...
Page 71: ...l The next step is to adjust the mixture by screwing the Jet adjusting nuts up or down by equal amounts making quite sure that the jets are hard against the nuts at all times The engine speed will vary when this is being done and the jets should be set so that the engine runs at the best possible speed for this setti ng of the throttle stop screws Final corrections to the slow running should then ...
Page 72: ...ide of the piston registerS with the key in the body and that the return spring is refitted correctly Great care should also be taken to see that all machined faces and parts are kept scrupulously clean The filter A filter is fitted in each carburetter behind the fuel pipe banjo union Removal of the banjo union bolt releases the filter and its spring The carburetter filters should be given attenti...
Page 73: ... and not correctly centred on replacement Section B 12 SOURCES OF CARBURETIER TROUBLE Piston sticking The piston assembly comprises the suction disc and the piston forming the choke into which is inserted the hardened and ground piston rod which engages in a bearing in the centre of the suction chamber and In which is In turn inserted the jet needle The piston rod running in the bearing is the onl...
Page 74: ... seating cleaned and refitted At the same time it will be advisable to dean out the entire fuel feed system as this trouble Is caused by foreign matter In the fuel and unless this is removed it is likely to recur It is of no use whatever renewing any of the component parts of the carburetter and the only cure is to make sure that the fuel tan k and pipe lines are entirely free from any kind of for...
Page 75: ...necting rod jet levers 8 Fork end onnecting rod 9 Nut fork end 10 Pivot pin fork end II Starter control 12 Bracket ontrol 13 Mixture control 14 Accelerator pedal assembly 15 Accelerator pedal roller 16 Pin pedal roller 17 Packing pedal 18 Control rod accelerator 19 Return spring accelerator II I L zJJ lr 1 Ii 8 10 1 _ _ J __ _11_ O t HII_ l10 _ _ 11 j TilE ABnURETTER ONTROLS TD Wishvilles Classic ...
Page 76: ...the spare wheel carrier Remove the bolts from inside the car Drain the tank detach the fuel line and remove the nuts from the lower ends ofthe tank retaining straps Disconnect the electric cable for the fuel gauge unit and lift out the tank M G Midget Issue 3 H E 91826 255 LATE TYPE FUEL PUMPS The later TF models arefitted with a high pressure type S U fuel pump which is attached to the rear right...
Page 77: ... The automatic advance device Is housed in the dIstr butor unit and consists of a centrifugally 0 perated mechanism by means of which the Ignition Is advanced in proportion to the engIne speed like the rest of the electrical equipment it is wired on the positive earth system which results in longer sparking plug life Distributor type The distributor is a lucas Model D2A4 Service No 40162 on early ...
Page 78: ... FIRING To test wfth sparking plugs In position a Start the engine and set It to run at a falrly fast Idling speed b Shert elrcu It each plug In turn by placlng a hammer head or the blade of a screwdriver with a wooden or insulated handle between the terminal and the cyllnder head No difference In the engine performance will be noted when short circuiting the plug In the defective cylinder Shortin...
Page 79: ...replacement coil must be fitted If the correct reading Is given remake the connection to the coil terminal n Ignition coli to distributor white with black lead Disconnect the cable from the low tension terminal on the distributor and connect the voltmeter to the end of this cable and to earth No reading indicates a damaged cable or loose connections 0 Contact breaker Gnd condenser Connect the volt...
Page 80: ...nable they should be replaced by new ones without hesitation Gaskets in dlfferent conditions are illustrated In Fig CA The upper left hand gasket was obviously not properly compressed owing to the plug not being tightened down sufficient Iy On the other hand It is unnecessary and unwise to tighten up the plugs too much What is required is a reasonably good seal between the plug and the cylinder he...
Page 81: ...s appear worthy of fu rthe r use it is good practice to dress the gap area on both centre and side electrodes with a small file before resetting them to F M G Midget Series TD J Issue 2 E 79345 1 53 the correct gap The intense heat pressu res exploslon shock and electrical and chemical action to which the plugs are submitted during miles of service are so Intense that the molecular structure of th...
Page 82: ... ng fit Do not alter the setting unless the gap varies considerably from the gauge thlck ness To adjust the setting keep the engine in the posltlon which gives maximum opening of the contacts and then slacken the two screws securing the fixed contact plate Adjust the position of the plate until the gap is set to C 6 the thickness of the gauge and then tighten the two lockIng screws Remember that t...
Page 83: ...back the two retaining clips and lift off the distributor head which can be lodged on the cylinde r block To fad Iltate replacement turn the engine over until the rotor arm M G Midget Series TD lssue 2 E 7 Jl4 5 1 53 is pointing to the segment in the cover for No J cylinder plug lead Fig C I J The cam bearing 1 lubricated through the opening revealed when the distributor rotating arm is withdrawn ...
Page 84: ...Before setting the timing make sure that the automatic advance and retard mechanism is working properly and is in its ully retarded position while the timjng is being set Irnportant To obtain an accurate setting an electrical method should be used to determine the actual position at which the points break and the following method can be used With the low tension lead connected to the distributor t...
Page 85: ...ure at one end Care must be taken not to overheat the new condenser when soldering it in position The capacity of the condenser is 0 2 microfarads Seetion C ll _ Fig C IS The parallel drlvlng pin locating the drivingcollarto the contact breaker spindIe is here shown d Undo the two screws fitted at the edge of the contact breaker base and lift them out together with the spring washers The contact b...
Page 86: ... by reaming or any other means as this would tend to Impair the porosity of the bushes and so prevent effective lubrication from being obtained SHOULDERED MANDREL BEARING BUSH DISTRI UTOR BODY Seetion C I2 REASSEMBLING THE DISTRIBUTOR Note Before assembly the automatic advance mechanism distributor shaft and the portion of the shaft on which the cam fits must be lubricated with thin clean engine o...
Page 87: ...OR CONDENSER SCREW SECURING CAM CAM CONTROL SPRINGS M G Midget lssue l H E 82966 1 54 Fig c rs The component parts of the distributor AUTOMATIC TIMING CONTROL SHAFT ASSEMBLY BEARING BUSHES C II Wishvilles Classic Automobile Library ...
Page 88: ...ter which follows the Service No Distributors bearing the suffix E or any letter subsequent to after the Service No 40162 are fitted with high 11ft cams and those with suffix retters previous to E are of the symmetr ic or asymmetric type HIGH LIFT ASYMMETRIC Fig C 20 The three types of distributor cam SYMMETRIC Fig C 9 The later type fhdng for the distributor consisting of a cotter bolt engagi ng ...
Page 89: ... the water pump spindle and both are driven by a belt from the crankshaft which also drives the dynamo Later models are fitted with a combined water temperature and oil pressure gauge DRAINING AND FILLING THE COOLING SYSTEM Remove the header tank filler cap Drain the water from the cooling system by means of the drain tap on the left hand side of the radiator bottom tank and the tap on the right o...
Page 90: ...the dynamo an and water pump belt tension Is effected by slightly slackening the two bolts on whlch the dynamo piVOts releasing the set screw at the top front end of the dynamo securing It to the slotted link and pulling the dynamo bodily Fig D 4 The two pivot bolts and the adjusting bolt for the dynamo mountlng which provide adjustment for th e fan belt tension are clearly shown by the arrows out...
Page 91: ... clreli ps 6 Bearings 7 Distance tube The water pump usembly on early models later models have a modified sealing gland see Fig D 6 8 Retaining c ove r rear 9 Felt washer rear 10 Retaining wasner rear II Spindle c irdip 12 Pump body 13 Seal washer 14 Spindle seal 17 o the driving pin for the carbon gland which is a loose fit in the shaft The pump spindle is carried on two ball races which should g...
Page 92: ...er dust excluder rear Circllp spi ndla Seal water pump Joint pump body to block Bolt pum p short Nut water pump stud Bolt pump long Fan blade No 14 IS 16 17 18 19 20 21 22 23 24 25 26 THE FAN AND WATER PUMP OMPONENTS p I D All IIliJllllil No Description I Stud water pump short 2 Stud water pump long 3 Water pump body 4 Spindle water pump 5 Rotor water pump 6 Taper pin rotor 7 Nut spindle 8 Washer ...
Page 93: ...pump MG862j271 Impeller vane MGB62j77 Water seal kit which have been replaced by the following SA2419j2 Water pump assembly X2 433 Water pump body X2 435 Spindle for water pump X2 4 4 Impeller vane 162600 Washer for water pump seal 162990 Water pump seal Quantity I I I I I set 2 6 _ _1 I I I 1 I l i l i l l j i 14 16 Fig 0 6 The assembly of the later type W3 ter pump I Spindle 2 Fan pulley 3 Felt ...
Page 94: ...D t tl t ll ll l l 1111 t r i f a i I t I I 1 till 11 11111 1 II I 1I n tt H 111 II 1111 I dl HI t it I L O O O J uIt 1 44 1 1111111111 fll _ _ _ I J D 6 Wishvilles Classic Automobile Library ...
Page 95: ...1 54 gradually and the filler spout is provlded with a specially shaped cam to allow this to be done easily Unscrew the cap slowly until the retaining tongues are felt to engage the small lobes on the end of the filler spout cam and walt until the pressure in the radiator Is fully released before finally ramovlng the cap Drain and refill the system as detailed In Section D I Seetion OD 2 TO REMOVE...
Page 96: ...cover assembly consists of a pressed steel cover 4 and a cast Iron pressure plate 18 loaded by six thrust springs 5 Mounted on the pressure plate are three release levers 12 which pivot on float Ing pins 16 retained by eye bolts 15 Adjusti ng nuts 14 are screwed onto th e eyeboIts and secu red by lock pins or staking Struts 17 are interposed between lugs on the pressure plate and the outer ends of...
Page 97: ... lT1 i J THE FLYWHEEL AND CLUTCD COMPONENTS 4 3 5 1 S5 b ASSEMBLY r C ttl I o I 0 0 1 fa f j 1 _ t 110 Wishvilles Classic Automobile Library ...
Page 98: ... Bolt bracket 51 Key elutch fork II Nut dutch adJu5ter 32 Cover elutch 52 Taper pln elutch fork 12 Pin dutch adjuster 33 Release lever dutch 53 Clutch opentln lever 13 Connecting rod clutch H Eyebolt and nut 54 Key elutch lever Ii Yoke pin e rod 35 Fulcrum pin release lever 55 Taper pin e dutch lever IS Spring e lutch return 36 Strut release lever 56 Clutch housing wIth bushes 16 Pin clutch lever ...
Page 99: ... kin 1 59 mm which gives a free pedal movement G of in or 19 mm at the clutch pedal which should always be main tained When the clutch pedal free movement becomes less than this it is essential to make use of the adjust ment provided This consists of an adjusting nut A and locknut B at the forward end of the clutch operating cable Care should be taken to tighten up the locknut B after adjustment I...
Page 100: ...ss the cover by means of the spindle of the press and while holding It under compression remove the adjusting nuts 14 and slowly release the pressure to prevent the thrust springs 5 from flying out Lift off the cover to expose all parts for inspection Remove each release lever 12 by grasping the lever and eyebolt 15 between finger and thumb so Fig E 4 When reassern bling the clutch the pressu re p...
Page 101: ...and retainer springs II Note If new partshavebeen fitted which may affect the adjustment the levers should be set using the gouge plate Part No 68885 as Indicated In Section 6 6 Section 5 REFIITING THE CLUTCH To refit the clutch to the flywheel proceed as follows Assemble the driven plate assembly in the flywheel I taking Care to place the larger chamfered spline end of the driven plate hub toward...
Page 102: ...ss over the high spots until true within this figure SootiOD E 8 SERVICING THE CLUTCH As the clutch facings wear the pressure plate moves closer to the flywheel face and the outer or shorter ends of the release levers follow This causes the inner or longer ends of the levers to travel farther towards the gearbox and decreases the clearance between the release lever plate and the release bear ing T...
Page 103: ...ace is required to transmit the maximum amount of power for a given surface area Since modern facing materials of the asbestos type have been Introduced in service the polished surface is common but it must not be confused with the glazed surface which is sometimes encountered due to conditions to be discussed subsequently The ideally smooth or polished condition will therefore provlde proper surf...
Page 104: ...o 9 408 an 8 in diameter clutch has been Introduced This has been done to alleviate the synchro noise condition and to Improve the torque carrying capacity The engine type description has been altered from XPAG lTD to XPAGJTD 2 Th is has been done for the reason thatwhile the power unit with gearbox complete is interchangeable neither the engine unit nor the gear box unit separately is interchange...
Page 105: ...111 11 JIllffllllll 1 1114 tt II t 40 TIlE M G MIDGET fSeries TD GEARBOX AND LUT U Note On later models the third and top selector shaft is extended at its rear end and is carried in an additional bearing in the remote control cover 11111 t I 4 I tIIII11111114rrrlrr r f I 3 o 3 a OQ I o I 1 Vi It ii It m Wishvilles Classic Automobile Library ...
Page 106: ...he floor mats and take up the floorboards Remove the gearbox cowl Disconnect the propeller shaft at its forward end marking the flanges so that they can be replaced in the same relative position on reassembly Jack up the engine unit under the rear of the sump using a large piece of wood between the jack and the sump to spread the load and disconnect the speedo meter drive at the gearbox end Discon...
Page 107: ... raw sufficiently to allow the gear shifters to be removed from the ends of the selector shafts Remove the nuts and set bolts completely and with draw the gearbox rear casing from the gearbox On early type gearboxes withdraw the selector shafts 0 ne at a ti me takl ng care not to lose the selector lock balls in the process Later models have a third and top selector shaft extended at Its front end ...
Page 108: ...The striking dogs for top third and second gears are retained on sliding hubs by balls and springs which THIRD SPfEP CONSTANT K ESH CEAA SPLINED LOCKING RING SHOWING SLOT IN LOCKEO _ POSITION OlE IN GEAR TH CUG WH CH pu Gr fS OEf 51 S E O o SU _ _ _ l I iI i I t j PlUNGU D SP tJl IG _ _ _ _ __ _ 1111 111 Remove the third speed gear collar by pressing lawn the spring loaded locking plunger and rota...
Page 109: ...1 J2S 75 A ss 67 1 I L I I I I I I 11 1 I I I I It I I I I I t t I I I I f1 I II t I I I I I 1 fI I 11 11 I I t i t II I 1 It I I I I I 1 11 I I t TOE GEARBOX COMPONEN I 51 1 P I t _ __ _ J i _ _ 1 i I I i t i 59 Wishvilles Classic Automobile Library ...
Page 110: ... bearing lock washer bearing Spigot bearing rollers Oil seal first motion shaft Reverse gear With bush Shaft reverse gear Plug reverse shaft Screw reverse shaft Top and third gear selector Locating screw selector Top and third gear shifter locating screw shifter Distance tube top and third Shaft top and third shifter First and second gear shifter Locating screw First and second gear selector Locat...
Page 111: ...in the correct position 24457 243n 3648 3649 24465 SA 2402J2 Gearbox Prodllction Modifications Commencing Gearbox No TF 939 for Series TO Midget The new shifter shaft is being fitted with a cirelip which gives a positive stop fo r th ird gear under all cond ltlons The follOWing parts are deleted 24367 3648 3649 REASSEMBLY OF THE SYNCHROMESH MECHANISM The striking dog is placed against the en d of ...
Page 112: ... i02 3 Shifter haft Assembly Top and 3rd Compri ing 2 57 Shafi 204377 Clrclip 3 48 Pin for Shaft 36 49 Rivet for Shaft Commencing at Engine No 31104 and Gearbox No TF 513 for Series TD Midget The existing arrangement of synchro baJls were peened into the Iynchro hub to prevent ejection The following pans are deleted No Off SA10S Sliding Hub Top and lrd with Sliding Cones Comprising 24246 Sliding H...
Page 113: ... provlded on the sleeve yoke for the lubrication of the splines of the sliding Joint Lubrication In service is with grease to Ref D page P 2 every 1 000 mlles 1600 km After dismantling and before reassembling the Inside splines of the sleeve yoke should be smeared liberally with grease There are therefore three lubricators In allan the propeller shaft one on each universal joint and one on the sli...
Page 114: ... dear Be sure to hold the bearing in a vertical position and when free remove the race from the bottom side to avoid droppIng the need Ie rollers Repeat thls operation for the opposite beari ng The splined sleeve yoke can now be removed Rest the two exposed trunnions on wood or lead blocks to protect their ground surfaces and tap the top lug of the flange yoke to remove the bearing race Turn the y...
Page 115: ...ing into position It is essential that the bearing races are a light drive fit In the yoke trunnions Repeat this operation for the other three bearings Replace the circlips and be sure that these are firmly located in their grooves If the joint appears to bind tap lightly t Fig G 5 When replacing the gasket reuiner use should be made of a hollow drift to tap It Into place without damage with a woo...
Page 116: ...int is always placed at the gearbox end B D Fig G 6 The correct method of assembtrng the universal Joints When the spllned shaft is assem bled to the drive shaft it is essential to see that the forked yokes on both shafts have their axes parallel to each other In other words the yoke A must be In alignment with the yoke 6 and the flange yoke C must be in alignment with the flange yoke D Note On la...
Page 117: ... of Unified screw threads GENERAL DESCRIPTION The rear axle is of the semi floating type It is of unit construction and no repairs or adjustments apart from those connected with the half shafts and rear wheel bearings brake drums and shoe mechanism Cdn be carried out without removing the complete axle unit from the car The rear wheel bearing outer races are carried in an extension of the rear axle...
Page 118: ...lllll II II 1 I _ I I f o i THE REAR AXLE AND PROPELLER SHAFT CO MPONENTS j 1 f I 1 37 36 28 Aff Y 52 12 10 0 11 9 0 4 3 2 3 3 I t t o l 1_ ao _ _ 0 3 IIV _ 17 57 8 CC_ 55 e2 51 24 61 27 i I trWB i 39 I I HUB DRUM ABoSY 36 I s Cl s 0 O l i 1 if f i I i t f _ Wishvilles Classic Automobile Library ...
Page 119: ...e lIut pllllon 8 Cage differential 27 Washer castle nut 9 Gear d lfferentlal 28 Rear axle shaft 10 Washer gear 29 Nut axle shaft II Pinioll differential 30 Washer axle shaft nut 12 Washer pin Ion 31 Bearing rear hub 14 Pin pinion 32 Distance washer hub bearing 15 Locking bolt pInIon pin 33 011 seal hub 16 Tab washer locking bolt 34 CoJiar oil seal 17 Bearing differential 35 Support brake plate 18 ...
Page 120: ...ION Oil is introduced to the axle through a filler plug on the right hand side of the pinion housing When replenishing or refilling the level of the oil should not be raised above the lip of the filling aperture H 4 It is of the utmost importance that only HYPOID oils of the approved grades and manufacture be employed if satisfactory service is to be obtained from the Hypoid gears Inspect the oil ...
Page 121: ... Seetion B 2 REMOVAL AND REPLACEMENT OF THE BRAKE PLATE ASSEMBLY Jack up the axle and remove the wheel as in Section H 1 See that the hand brake is fully released Remove the hub as In Section H 1 If it Is required to remove the brake plate assembly to the bench for attention the lockheed pipe should be disconnected but this is not recommended unless absolutely necessary as it entails bleeding the ...
Page 122: ...any way in the process H 6 Seetion H 4 REMOVING REAR AXLE FROM CAR Raise rear of car by means of a suitable sling and block up under the chassis just forward of the rear spring front mountings Remove both road wheels and release the hand brake Disconnect the Lockheed flexible pipe at its uncclon to the bracket on the chassis Disconnect the brake cable casings from their anchorage to the spring bra...
Page 123: ...er detailed in subsequent sections It is important that the repairer be quite clear on this point before he undertakes the dismantling of the axle Spacers between the outer races of the differential bearings and faces of the recesses machined in the axle casing and cover control the posltlon of the crown wheel in relation to the centre line of the pinion Adjustment of the pinion position is made b...
Page 124: ...tion 0 7 DISMANTLING THE DIFFERENTIAL AND CROWN WHEEL ASSEMBLY When the differential assembly has been removed from the axle casing as detailed in Section H 6 it is dismantled by bending back the tab of the locking plate of the bolt locating the differential pinion shaft withdrawing the bolt and removing the shaft The differential pinions can now be removed from the differential cage by swinging t...
Page 125: ...entral portion is loose in the outer metal casing or if the spring is fractured or broken The differential gears pinions and pins should be renewed If there is any doubt about their condition M G Midget luue 3 H E 95781 9 55 although more latitude In wear is permissible in these parts wIthout detrimental effects than is the case with the crown wheel and pinion Seetion 0 9 TO REPLACE A DIFFERENTIAL...
Page 126: ...hers The pinions are then rotated In the cage until they register with the holes In the cage for the shaft The pinion spindle whIch should be a light push tit H IO In the cage Is then Inserted taking care to line up the locking bolt holes Note The slot In the shaft can be used as a guide Fit the locking bolt and turn up the tab of Its lockl ng washer Fit the crown wheel to the differential cage af...
Page 127: ... to the axis of the crown wheel and M G Midget Serlei TO Issue 2 E 8 52 it is fitted between the head of the pinIon and its rear bearing Adjustment of the pinion positIon Is made by vary ing the thlckness of the pinion washer These are available in a range of thickness varying by 001 In 025 mm and are marked on spares replacements only The pinion is fitted to the axle In the follOWing way Fit the ...
Page 128: ... H 12 To assist manufacturing conditions it is occasionally necessary that a pinion be assembled away from the standard position If this is so the variation is marked on the pinion head In a ring such as 2 the sign meaning that the centres are increased by 002 in Correction has to be made for thts and when the figure is plus the amount must be taken from the washer thickness and if the figure Is m...
Page 129: ...depth of the differential bearing bores Is made by taking note of the markings on the old and new axle casings For example If the old casing is 002 in and the new one 004 in the positive difference 001 in is added to the existing differential bearing distance collar That is to say If the old distance collar is marked 505 in then the required new distance collar is 507 in Similarly if the old casin...
Page 130: ... are in contact The ten nuts fastening the halves of the axle housing together are then screwed lightly in position and Seetion 8 16 Fig H 19 The differential bearing spacer for the axle cover and recess in the cover Fig H IS The locat ion of the differe nt ial bearl ng Sp lcer in the axle cuing is indicated by the arrow REASSEMBLING THE AXLE Provided that no replacement parts are fitted the assem...
Page 131: ...H i i i i I j i f i I 1 f I I I J lilt I I 11111 I 111 11 1 III t 1 f1ltlrtlttl Ull 11 r 11 111 11 II t II I II Itt 11111 1 _ _ f f 0 I j I i I t H IS Wishvilles Classic Automobile Library ...
Page 132: ...lat of the hexagon Wheel Stud Nuts 6y a notch cut in all the corners of the hexagon These identification marks are clearly shown in the illustration above and It is obviously of the utmost importance that any nuts bolts or set screws so marked are used only in conjunction with their associated components having Unified threads and that only replacement parts with Unified threads are used as these ...
Page 133: ...55 817 943 1 132 1 321 1 509 For Unified nuts normal 44 1 504 566 692 755 880 943 1 132 1 321 1 509 For Unified nuts heavy 069 1 258 446 NOTE In the case If some Uniiled threaded components the size of the hexagon for the nut ls different from that of the bolt Where this occu rs the spanner size is shown In heavy type In the above table Fig H 22 The arrangement of the rear hub and brake drum on Se...
Page 134: ...SHAFT COMPONF TS Series U TF I 36 32 31 34 33 35 y I 1_ 30 A55V L H 7 WIRE WHEEL EQUIPMENT 18 56 A55Y 52 t I t t t tt t t t t H t t 4 t t t rt t t t t t t t1 1 t t t t t t1 t t t1 t t t t H 1 t 1 t t1 1 t 4 t t t t 1 t 1 I o 39 G l I O l if l tv J ll a I Wishvilles Classic Automobile Library ...
Page 135: ...t oupllng bolt Bolt cou pllng Plug rubber Nut hub Hub assembly LiH 1 Brake drum Locking tab Stud s hub 59 Steel washer 60 Cork washer 61 Grease nipple 62 65 70 63 68 69 Hub cap LfH 66 67 64 Disc wheels Bort for suppOrt Nut Nut wheel stud Grease plug axle cube 32 Distance washer hub bearing 33 Oil seal hub 3I Bearing rear hub 35 Suppon brake plate H Collar oil seal 37 36 38 Hob and brake drum assem...
Page 136: ...ow the axle to hang from the rebound straps Remove the spring anchorage bolts and shackle bolts when the springs may be lifted away SeedOD 1 2 DISMANTLING AND REASSEMBLING THE SPRINGS Slacken off and remove the spring dip bolts distance pJeces and ru bber packings Release the locknut and nut from the spring centre bolt and remove the distance piece and bolt The leaves may now be separated releasin...
Page 137: ...pe and the silencer which is not clearl y a bservable in this lllustratian TIU DASSIS SUSPENSION KADIATOR FUEL TANK AND EXHAUST I SYSTEM CJOMPONENTS _ J 48 46 C 44RH UJ o A5LH 1 132 1 20 131 I071 H ros IO ws 136 J 37 rJ30 t l 1 1 1 _ I I 11 11 I I I i i i j i j I 1 1 Wishvilles Classic Automobile Library ...
Page 138: ...k end 7 Fourth leaf com plete with clips 123 Washer dralJI plug and main feed 1 25 Dash stiffener assem bly 15 leaf ellpl 124 Filler up Westwood complete 26 Gusset plate dash stiffener 76 DlstaJlce tube 12S Trlgler eap 27 Gusset plate top dash stiffener 77 Fifth leaf 126 End covllr fuel tank liH 28 Steering knuckle RI H 78 Sixth leaf 127 End cover fuel tank RIH 29 Steering kJluckle L IH 79 SeveJlc...
Page 139: ...ubber bushes are deflected to an equal extent in both directions during service Failure to take this precaution will inevitably lead to early deterio ration of the bushes Section 1 3 MAINTENANCE OF THE REAR SPRINGS As the rear springs are mounted In rubber spraying with oil should be strictly avoided The only attention requlred is an occasional tlghten Ing of the spring seat bolts to make sure the...
Page 140: ...kl ng In the plain bear ngs of the housl ng No adjustment for bearing wear in the box is provided except by the fitting of the necessary new parts When in new condition the backlash in the tooth engagement is hard Iype rcepti ble i e OOlin to eX in 025 mrn to 075 mm The steering mast is attached to the steering gearbox by a rubber bushed coupling to Insulate it from road shocks MAINTENANCE All wor...
Page 141: ...1 It III I THE STEERING GEAR COMPONENTS 7 2 I A Y l Y 25 tJ 0 1111111111 1111 III II I I 14 4 4 _ _ 1 1111 IllltIIII11 1 11111 11111 i J i 1 i I f f f f i f i i i j i i f I I t I i I I m i i I I 1 co _ 10 _ _ _ _ Wishvilles Classic Automobile Library ...
Page 142: ...re ring for caps 28 Seal ball 101nt 32 Grease nipple h in x90 0 steering arm 35 Key onnector 33 Adjustable top end 34 Key steering wheel 30 CIIp smalI 24 Cap inner grease retaining 29 Clip large 36 Spring cover 37 Cover cup 38 Clamp steering column 39 Bolt lamp 40 Nut Iamp bolt KEY TO THE STEERING GEAR COMPONENTS Description 5 Shim 005 in thick tail bearing 3 Pinion steering I Rack housing steerin...
Page 143: ...ent clamp and extract the clamping bolt This will permit the wheel to be withdrawn to its full extent and enable the plated helical slee e to be contracted towards the wheel to re veal the key at the upper end of the column which engages the tong key way in the spllned adjustable shaft Remove the key from the column by pushing a strip ofth in metal into the keyway and unde r the key Lift it out of...
Page 144: ...s thrust washer is trapped behind the rack teeth M G Midget Issue H E 892n 10lS Hold the rack bar in suitable clamps In a vice knock back the lock washers and undo the ball Joint caps with the special spanner Tool No T I 14 see Section Q The ball seat and shims should now drop out Screw out the ball seat housing with a special claw spanner Tool No T 113 see Section Q Note Should the balljointcapsc...
Page 145: ...h in the gear teeth This should _be adjusted in the followlng manner Check the damper spring which should have a free length of approximately 1 024 in 26 01 mrn and should give a load of 80 lb 36 3 kg when compressed to 75 in 19 05 mm When the steering gearbox is completely assembled fit the plunger spring and cap but omit the shims Screw down the cap until the plunger bottoms While screwing down ...
Page 146: ... coli springing The front wheels follow the road surface without influencing each other and each wheel Is permitted to rise and fall vertically It gives perfect stability with riding comfort and by the combination of the direct acting rack and plnlon steering gear It also provides light and accurate control under all conditions The inner mountings of the lower wishbones are titted with flexlng rub...
Page 147: ...ally in th e desired direction These both have right hand threads Note To ensure that the steering gearbox rack Is in the centrClI position and that the steering geometry Is correct it Is important that the tie rods are adjusted to exactly equal lengths This can be ascertained by measuring from the end of the flats to the locknuts SectIon K 2 CHECKING THE WHEEL CAMBER CASTOR ANGLE AND SWIVEL PIN A...
Page 148: ... care of the thrust washers rubber seals retainers and fulcrum plns Release the jacks from under the spring pans Press down the lower wishbonoe assemblies and remove the coil springs ROAD UNE STATIC POsmoH 1 F RONTIAXLE A RO LLING RADIUS 12 35 n FIg K 2 The s of speelaillocating jigsito sec the chassis In Its correct position fOf checking the sceerlng geometry is a iLdvlsed to ensure the best resu...
Page 149: ...1 111 1 1 I I I I I I I I fULL REBOUND FU L BUMp Fig K 3 The front suspension system showing i range of move ment and Its effect on the camber THE FRONT SUSPENSION _ _ _ 1111 III tll111 11 I t till 1111 lltt Itl t t t t l l l l l l l l l l _ i 1 j 1 i 1 I i J i f 1 tttl tl lll K KA M G Midget Series rD Issue 2 E Wishvilles Classic Automobile Library ...
Page 150: ...ON K Check the fulcrum pin distance tubes for scoring or wear These should be 2 337 in OOI5 in 59 36 mm 04 mm long by 7 185 7 180 in 19 01 mm 19 OQ mm diameter Examine the case hardened thrust washers for ridges the faces should be flat and parallel within 0005 in 01 mrn The thickness should be 068 In 066 in 1 73 mrn j 1 68 rnrn the bore 510 In I 505 in 12 95 mrn j 12 83 rnrn and the outside dia 1...
Page 151: ...he lower suspension levers are set parallel with the ground to ensure even stresses on the bushes in service Fit the spring pans between the levers but with the heads of the bolts inside the spring pan Do not tighten up the spring pan bolts solid but leave them half a turn slack Press down the lower wishbone assemblies Smear each end of the call springs with grease to prevent any slight squeaking ...
Page 152: ...inks fitted to the left hand side of the ca r have left hand threads at each end and those fitted to the right hand side have right hand threads 2 The swivel pin links screw onto threads on each end of the swivel pIn and the threads are waisted at their centre to avoid fouling the pivot bolts passing through the links Before the pivot bolt is replaced the link must be correctly positioned on the t...
Page 153: ... be withdrawn with the aid of a separate extractor of the type shown in K 8 Fig K 7 this is the special service extractor Part No 68895 see Section Q Care must be taken not to damage the oil seal at the rear ofthe bearing Important When the front hub has been removed the Inner bearing 011 seal and hub distance washer must be removed from the stub axle and replaced in the hub before It is refitted ...
Page 154: ...ring pan in the position shown in Fig K 8 and jack up until the hydraulic damper levers are dear of the rebound rubber Remove the lower fulcrum bolt Swing up the hub unit and rest on a suitable block Release the jack from under the spring pan press lown the lower wishbone assembly and remove the cell spring Seetlon K lS FITTING NEW RUBBER BUSHES TO LOWER WISHBONE INNER FULCRUM Remove the coil spri...
Page 155: ... MODIFIED FRONT HUB GREASE CAP Seal 2 off Grease retainer cap 2 off Spring clip 2 off Split pin i in X Ii ln 4 off Washer 2 off Distance tube 2 off for one piece hub and drum only The front hubs on earlier models have been subject to grease leakage from the outside felt and later cars have a grease cap fitted to the hub end whlch ellml nates this trouble For existing cars without grease caps a spe...
Page 156: ...can be carried out with the dampers either in position on the chassis or removed No adjustment of the hydraulic dampers is required or provided They are accurately set before leaVing the Works to give the amount of damping most SUitable for the car Any attempt to dismantle the piston assembly by removing the caps will seriously affect the operation and performance Seetlon L I REPLENIS HI NG Every ...
Page 157: ...ower wishbone pan till the wheel is clear of the ground on whichever side it is wished to remove the damper L 2 Remove the wheel and detach the top pivot bolt for the swivel pin Swing out the hub unit clear of the upper wishbone and support it on a suitable stand to prevent straining the brake hose Then unscrew the fa ur set screws holding the dam per to the chassis rame Section L 4 TESTING THE DA...
Page 158: ... assembled pin at the other end of the link also facing outwards from the hydraulic damper movement r M G Midget Issue 2 H E 82966 1 154 Care should be taken to reassemble the links the correct way round or it will be impossible to connect them to the axle on refitting to the chassis Disconnect the link from the lever arm by pressing out the end of the link from the rubber bearing of the lever arm...
Page 159: ...65 F Weight applied at end of 8 in 20 32 em arm 25 lb 11 34 kg REAR DAMPERS Series TO Range of movement 35 degrees either side of centre line LA Rebound stroke setting 20 degrees per sec at 400 Ib jln 4 6 m kg torque at a temperature of 18 C 650 F Weight applied at end of 6 in IS Hem arm 66 lb II oz 30 27 kg Compression strokesetting 20 degrees per Sec at 2S0 lb in 2 9 m kg torque at a temperature...
Page 160: ...der Removal of the flexible hose Removal and replacement of the brake shoes Relining the brake shoes Brake fluid The hand brake Rear brake pipes Braking irregularities and th eir causes GENERAL DESCRIPTION The Lockheed hydraulic brake operating equipment comprises a combined fluid supply tank and master cylinder in which the hydraulic pressure is generated and wheel cylinders which operate the bra...
Page 161: ...6 THE HYDRAUI I SYSTEM AND OMPONENTS 41 40 B 37 ffJ 38 48 e 47 39 42 t 1 1 t 1 i lltt I 41 _ _ I III IJI I 4 _ ttlttttI1414 _ _ I i i i 111 11 11 1111 aII111 4414 111I1I1 1111 J Itllllll14414 1111141144 tll144 11111111114 tll1414 4 I Til II 1 14 I III i i 1 i I i I Wishvilles Classic Automobile Library ...
Page 162: ...f I i I f i I 7 Master cylinder and tank assembly 24 Guket muter cylinder 40 Piston and dust cover assembly 8 Drain plug 25 Hose assembly 41 Cup piston 9 Gasket draln plug 26 Four way piece 42 Cup filler 10 Valve assembly 27 Three way piece 4J Banjo connection forward RjH II Cup valve 28 lock washer 44 Banjo connectlcn s fcrward liH 12 Wuher v ilve 29 lockn ut hose 45 80lt collnectlcn 13 Spring wi...
Page 163: ...cup will cover the by pass port causing pressure to build up within the system and produce binding of the brakes on all wheels The reduced skirt of the piston forms an annular space M 4 which is filled with fluid from the supply tank via the feed hole Leakage of fluid from the open end of the cylinder is prevented by the secondary cup fitted to the flange end of the piston On releasing the brake p...
Page 164: ...n them antl clockwtse FiX M 3 There must be i in 13 mm of free movement at the brake pedal pad Rubber boot flue Master Valve Valve Piston return Dished Piston Piston Push rod cylinder washer body sprinc washer stop assembly FiX 1 1 4 The component pam of the m m er cylinder Later modelshavea thin dished copper washer between the end of the piston and the master cup whIch must be fitted with Its co...
Page 165: ...eder tube to the wheel cylinder bleeder screw and allow the free end of the tube to be M 6 submerged in a small quantity of fluid in a clean glass jar Open the bleeder screw one full turn Depress the brake pedal qUickly and allow it to return without assistance Repeat this pumping action with a slight pause before each depression of the pedal Watch the flow offluid into the glass jar and when air ...
Page 166: ...ved Section M 5 DISMANTLING THE MASTER CYLINDER Remove the filler cap and drain the Lockheed hydraulic brake fluId from the master cylinder Remove the main feed pipe union and copper washers Push the piston down the cylinder bore and remove the retaining eirelip Fig M IO Access to the master cylinder for removal is obtained by removing the floo rboard Remove the remaining internal parts l e the pi...
Page 167: ... detailed in Section M 2 Connect the fluid pipes and bleed the system as in Section M 3 Check the system for leaks with the brakes fully applied Renew the copper washers on the two way outlet connection If necessary Section M 8 BRAKE ASSEMBLY Two leading shoes are incorporated in the front wheel braking system and take the greater percentage of the braking load The rear brakes are of the leading a...
Page 168: ...d brake cable yoke and disconnect the cable from the wheel cylinder lever Remove the rubber boot and withdraw the lower half of the piston from the wheel cylinder Extract the wheel cylinder from the brake plate Seetlon M IO DISMANTLING THE WHEEL CYLINDER Reor cytinders Tap out the hand brake lever pivot pin and with draw the lever Withdraw the upper half of the piston the rubber cup and the bakeli...
Page 169: ...It II 1111 _ 1 lttltl t 111111111 144 111 3 P 3 1 0 i O l IP i i i t t l 0 I i if I c IP I 5 L 1 1 _ _ _ o i THE HAND BRAKE AND BRAKE SHOE tJOMPONENTS I r I i I I I I _ n i f I I 33 94 35 31 30 29 28 26 O eI U i 2 2 t i I i Wishvilles Classic Automobile Library ...
Page 170: ...nlo bolt small 21 Hand brake lever 35 Twin cable abutment 8 Gasket banlo bolt large 22 Pivot pin hand brake lever 36 Adjuner nut brake cable 9 Brake gear rear axle back plate assembly R H 23 Lever assembly 37 Cable hand brake 10 Brake gear rear axle back plate assembly L H 2 Ratchet assembly 38 Clevis pin II Spring shoe tension 25 Hand brake pawl 39 Wheel stud 12 Mask shoe adjuster 26 PloWI rod ha...
Page 171: ... in spanner undo the nut to release the switch and the two copper washers fitted either side of the two way union Seetion M 14 REMOVAL AND REPLACEMENT OF THE BRAKE SHOES Remove the rear brake drum and hub as detailed in Section H I Instructions for removing the front brake dru m and hub are given in Section K 12 Draw the brake shoes apart until they can be removed from the brake plate Important Wh...
Page 172: ...p A slight upward pull on the lever will allow it to move to the off position without depressing the ratchet knob It operates the rear brakes by means of cables and no adjustment is necessary as adjustment of the hydraulic brake automatically adjusts the hand brake If the two brass nuts on the lever are moved the whole braking system will be upset M G Midget Issue 3 H E 82966 1 54 Sufficient movem...
Page 173: ...nt types or grades of lining fitted Brakes grab a Shoes require adjusting b Drums distorted c Greasy linings d Broken or loose road spring e Scored drums f Worn suspension linkage Dished washer 11 l lllt Ittllllll 11111 I II i f i I I j i I i I I j Fig M 14 i The correct method of fitting the thin dished washer between the piston head and the j master cup of the master cylinder It is imperative to...
Page 174: ... Nos N 29 to NAO lamps Series TF Section No NAI Replacement bulbs 12 volt Series TF Section No NA2 Windscreen Wiper Series TF Wiring Diagram Series TF N GENERAL DESCRIPTION The electrical equtpment fitted to the M G Midget is of the 12 volt type incorporating constant voltage control for the charging circuit The positive earth system of wiring is employed The battery is mounted on the dash under t...
Page 175: ...The hydrometer contains a graduated float on which is indicated the specific gravity of the acid In the cell from which the sample is taken The speclfc gravity readIngs and thei rindications are as follow 1 280 1 300 Battery fully charged About 1 210 Battery about half discharged Below 1 SO Battery fully discharged N 2 These figures are given assuming an electrolyte temperature of 60 F 160 C If th...
Page 176: ...sible temperature of 1200 F 9 C the charge must Add I part by volume of To obCaln SpeCific Gravity 1 835S G acid to distilled corrected to 60 F 16 C waCer by volume as below 1 350 8 parts 1 320 2 2 1 300 2 5 Heat is produced by the mixture of acid and water and it should therefore be allowed to cool before pouring It into the battery otherwise the plates separators and moulded container may become...
Page 177: ...mo and control box are connected correctly The dynamo terminal D should be connected to the control box terminal D and the dynamo terminal F connected to the control box terminal cl After SWitching off all lights and accessories disconnect the cables from the termInals of dynamo marked 0 and F respectively d Connect the two terminals with a short length of wire fig N Testing the tension of the bru...
Page 178: ...No reading on the voltmeter indicates a break in Seetion N 3 REMOVAL AND REPLACEMENT OF THE DYNAMO Remove the set screw securing the insulator pad to the rear face of the dynamo Disconnect the dynamo leads from the dynamo terminals Disconnect the revolution counter drive from the dynamo To remove the dynamo slacken Its three attachment bolts and swing the dynamo towards the engine to give maximum ...
Page 179: ...e more metal than is necessary Polish the commutator with very fine glass paper Undercut the Insulators between the segments to a depth of n In 8 mm with a hack saw blade ground down to the thickness of the insulator N 6 Field coils Test the field coils without removing them from the dynamo yoke by means of an ohmmeter The reading on the ohmmeter should be between 6 0 and 6 3 ohms If this Is not a...
Page 180: ...ew rivets from the Inside of the end bracket and open the rivets by means of a punch to secure the plate rigidly in position fig N S To fi the pole shoes correctly an expander of the type illustrated is required D Locate the pole shoes and field coils by lightly tightening the fixing screw g Insert the pole shoe expander open it to the fullest extent and tighten the screws h Finally tighten the sc...
Page 181: ... secu ring th e starter motor to the flywheel housing and withdraw the starter Replacement is carried out in the reverse manner to that detailed for removal Type The starter is a Lucas Model M35G Service No 25022 These identification marks are stamped on the yoke When ordering replacements always quote these numbers Its lock torque isapproxi mately 9 31b ft 1 3 m kg with 300 350 amps and 7 5 8 0 v...
Page 182: ...and brush gear In the manner described for the dynamo In Sections NA and N S The brush spring tension should be 30 40 oz 850 1134 grams This operation should be carried out every 12 000 miles or 20000 kilometres In the unlikely event of brush replacement being necessary this must be carried out by a Lucas Service Agent as the operation entails dismantling of the starter applied to the shaft extens...
Page 183: ...lets AIt Fig N 12 attached to the brush boxes B on the commutator end bracket and two A Fig N 13 are connected to a tappi ng B on the field coiIs The flexible connectors must be removed by un soldering and the connectors of the new brushes secured In their place by soldering The brushes are pre formed so that bedding of theIr working face to the commutator is unnecessary Drive 0 If the pinion is t...
Page 184: ...he field coils they must be renewed When renewing field coils carry out the procedure detailed In the Dynamo Section N S Armature Examination of the armature will In many cases reveal the cause ef fallure e g conductors lifted from the commutator due to the starter being engaged while the engine is running and causing the armature to be rotated at an excessive speed A damaged armature must in all ...
Page 185: ... voltmeter needle flicks and then steadies thls should occur at a voltmeter reading between the limits given In the next column for the appropriate tern perature of the regulator N 12 Setting at 100 C 500 F 16 1 16 7 volts 20 C 68 F r5 8 r6 4 30 C 86 F 15 6 16 2 400 C 1040 F 15 3 15 9 If the voltage at which the reading becomes steady occurs outside these llrnlts the regulator must be adjusted Shu...
Page 186: ... 12 7and 13 3 the cut out contact should close If the cut out has become out of adjustment and operates at a voltage outside these limits it must be reset To make the adjustment slacken the locknut E Fig N ll turn the adjusting screw F a fraction of a turn in a clockwise direction to raise the operating voltage or In an anti clockwise direction to lower the voltage Tighten locknut after making the...
Page 187: ...ubrication see paragraph 8 If the armature is only tight occasionally the stiffness Is probably In the gearbox or Is caused by dirt or other foreign matter In the air gap between the armature and the pole shoes Remove the wiper back plate and examine the gears and links for evidence of stiffness 5 Commutator dirty Clean the commutator by means of a cloth moistened with petrol Carefully remove any ...
Page 188: ...curing bracket by springing It from its flxtng Slacken the locknut on the fixed contact and rotate the adjustl ng nut until the contacts are Iust separated indicated by horns failing to sound Turn the adjust ing nut haifa turn in the opposite direction and secure in this position by tightening the locknut Finalty if the note is stilt unsatisfactory do not dismantle the horn but return It to a Luca...
Page 189: ...n is to be retained The ant dazz e device Early Home models are equipped with a double filament bulb In the left hand headlamp controlled by N 16 the dipping switch Operation afthe dip switch extln gulshes the right hand lamp and simultaneously deflects the left hand headlamp beam downwards and to the left to provide good illumination ofthe left hand kerb On Export models and later Home models bot...
Page 190: ...r have been employed the normal symmetrical type and more recently holders with offset bayonet slots The latter type have been Introduced to ensure that the bulbs cannot be fitted the wrong way round thus causing the high wattage filament to be In circuit when the tail lamp switch Is on and the low wattage filament to be operated by the stop switch When fitting replacement bulbs no difficulty shou...
Page 191: ...ccess to the bulbs of the ignit io n and fuel warning lamps Is obtained by unscrewing the slotted plated rims surrounding the lights Removal of the rims Fig N 29 Access to the panel lamps is obtained by removing the instrument panel cover releases the bulbs from their spring holders and no difficulty arises in replacement The ignition and fuel warning bulbs are Lucas No 987 12 volt 2 2 watt Sectio...
Page 192: ...ing poor light from the lamps and hydrometer readings below 1 200 It may be due to the dynamo not charging or giVing low or intermittent output The ignition warning light will not go out If the dynamo fails to charge or will flicker on and off ln the event of intermittent output b Examine the charging and field circuit wiring tightening any loose connections or renewing broken cables Pay particula...
Page 193: ...As paragraph I a b Examine the battery connections making sure that they are tight and renew any faulty cables Section N 25 THE HEADLAMP BEAM WARNING LIGHT In order to give the driver visual warning to dip his headlamp beams on approaching other vehicles later M G Midget cars have a warning light in the speedometer which glows when the headlamp beams are in the raised position and is extlngulshed ...
Page 194: ...ATE ILlltAlJIU lION LNJP 7 I JJ j i ll tl r 12 VOlT om STAAlER SWItCH DI 501 RI8UTOR O 0 6 I 49 09 25 i 29 __ _ 57 g I M G Midget Series TO Issue 2 E 42 rOG LAMP WHEN FlllW l lf lCl lMI I LEfT HANO W77341 41 N 2 Wishvilles Classic Automobile Library ...
Page 195: ...Fl BU TOFI I 16 ce 1 44 PAN E L LIGHTS i 100 r NI CC HROL BOX 57 DYI IAMO 25 peTROl F tJt tp 91 57 _I 57 PETROL lANI UNIT 0 H 40 24 4 E I rt I J5 aox g lB 40 40 Je WINUT N E HORNS l ICRHNWlPER STOP L AMP SWITCH 41 H MP RIGHT HAND 41 rtE A lAMP W 20451 1j F T HAtIll Key to cable colours as on page N 20 N 22 M G Midget Series TD Issue 2 E Wishvilles Classic Automobile Library ...
Page 196: ... FOOT OPERATED DIP SWITCH AND PROVISION FOR FLASHING TRAFFIC INDICATOR LIGHTS vcp TAI 00ICl T1CIl I 01 t I I I c r _ _ L PrnlQI _ i I WI lO roH lOIlHS I i l 1 V u I 07 1 J eIGHT I 25 n C 41 18 W23300 Key to cable colours as on page N 20 M G Midget Issue 2 H E 91826 2 55 N 23 Wishvilles Classic Automobile Library ...
Page 197: ...er ceases to flow through the flange and begins to rise above it The electrolyte level is now controlled by the air lock N 24 c Release the water which has collected in the flange by lifting the tube slightly The electrolyte level is then correct Section N 28 MODIFIED TAIL AND STOP LAMPS La er models are fitted with circular tall and stop lamps in place of the moulded type previously used They are...
Page 198: ...mps are buiIt into t he wings andare fitted with dou ble filament buIbs The design of the headlamp and its holder is such that the bulb is correctly positioned in relation to the reflector and no special attention to fccusl ng is required when a replacement bu Ib is fitted In short the lamps are of the pre focused type with replaceable bulbs The onu dazzie device All models are equipped with doubl...
Page 199: ... them from becoming finger marked A trans parent and colo urless protectiVe covering enables any finger marks to be removed by polishing with a chamois leather or a very soft dry cloth if they do become marked Do not use metal polish on reflectors Chromium plated surfaces such as lamp rims should be washed with plenty of water and when the dirt is completely removed they may be polished with a cha...
Page 200: ...ake sure that the bulbs have been fitted the right way round and they are marked top to facilitate their correct replacement in addition to possessing offset pins to prevent their incorrect replacement Seetion N 38 NUMBER PLATE LAMP Series c TF U A single bulb with bayonet fixing is fitted and the cover may be removed after slackening the small retaining screw Fig N 39 Illustrating t he removal of...
Page 201: ...brushes bear freely on the com mutator If they are loose and do not make contact a replacement tension spring is necessary The brush levers must be free on their plvots If they are stiff they should be freed by working them backwards and forwards by hand and by applying a trace of thin machine oil Packing shims are fitted beneath the legs of the brush levers to ensure that the brushes are central ...
Page 202: ...ER J 0 N8E I W RNING IGHT 2 P TAot wAl HltiG UCHt ICUI TION WARNING 44 LIGHT 4 IC H r 4 1 PANEL 4 4 __ M AP U r1T I sWITCtl y H SIDE P ETR O puro tP DIRE eTlON INDICATOf LAMP Jb lGNITI S TCH IS ca I O O 0 0 s D15TR1ftUTOR I I q 157 4jl DIP M I IW LAMeNT m wEN 57 I HEACt MP EFT HMO CONNEC TORS t FOG AMP WIlEN muo 38 HE AOt At 4P RIil r HANO OII rCTION INOICA l OIl 17 RELAY r1 DIPPER SWrTCIi o J tC ...
Page 203: ...the tyre Inflated to the correct pressure M G Midget Issue 3 H E 9J826 2 55 The jack The jack Is stowed in the tool locker under che bonnet To raise the car see Figs 0 and 0 2 To take off a road wheel remove the hub cover by Inserting the flattened end of the wheel nut spanner between the plate and the wheel adjacent to a retaining stud Give the spanner a sideways twist and the hub cover will come...
Page 204: ... remove and examine both covers and tubes Keep the tread free from grit and stones and arrange for any repairs to be Carried out Clean the wheel rims and keep them free from rust Paint the wheels jf required and replace the tyres and tubes Keep the brakes and clutch adjusted correctly and in good order Fierce ness or uneven action In either of these units has a destructive effect on the tyres Misa...
Page 205: ...w marking their tyres with a white spot or spots in the neighbourhood of the bead at the lightest point of the cover similarly they are marking the inner tubes with a group of coloured spots to Indicate their heaviest point When tyres are assembled care must therefore be taken to see that they are assembled with the white spots on the cover coinciding with the coloured spots on the tube and not op...
Page 206: ... valve into the tyre as far as possible in order to ensure the tube s not trapped be een the bead and the rim then pull it out again into its correct position 7 Inflate slowly until the beads are fully seated 8 Remove the valve core to deflate the tube completely 9 Reinflate to the correct working pressu re see page 0 1 This proced ure must be followed whenever a tube is fitted The object of the d...
Page 207: ...be loosened slightly The experienced wheel builder will generally be able to gauge when the correct tension has been reached either by the general feel of the spokes or by the ring ing note wh ich the spoke wilt give if lightly struck with a small spanner or similar metal object When build ing is completed the wheel should be examined carefully to ensure that no spoke ends protrude into the rim we...
Page 208: ...acteristics such as operating temperatures oiling systems size of oilways clearances and similar technicalities and the use of the correct oil is therefore essential p SeetlOD P l ENGINE LUBRICATION A New engines should have their oil drained after the first 500 miles 800 km and then be refilled with fresh oil Subsequently the 011 should be changed at Intervals of 3 000 miles Sooo km Fig P 1 The o...
Page 209: ...S KING PINS PROPELLER SHAFT CLEVIS PINS AND LEVER FULCRUMS All conditions Energ rnse Filtrate Ambroline Duckham s I CastrQlease Esso Mobilgrease Shell L 3 Super LH T L B 10 L M Multi M P RetinalC Lithium Grease Grease purpo e A Grease Grease H I E CABLES AND VITAL CONTROL JOINTS All conditions Energreue I Filtrate Ambrollne Duckham s Castrolease Esso Mobllgrease Shell L J Super L H T L B 10 L M Mu...
Page 210: ...rough the apertu re in the toebeard Fig P 3 The external filter showing its supporting strap and oil pipe con nectlons Later models are fitted with a filter of the re newable element type attached to the pump body See Fig P 21 that there are no oil leaks On engines previous to No XPAG TD 2985 an alternative filter Part No 24475 may be used provided that special narrow brackets Part Nos MG862j394 a...
Page 211: ...g provided after the first 500 miles 800 km with a new car and subsequently every 6 000 miles 10000 krn The capacity of the axle is 21 pints 1 3 litres PA Seetion P 4 GREASE GUN LUBRICATION POINTS Extensive use of oil Jess bearings has reduced the number of points requiring attention with the grease gun to a minimum Fig P 9 The grease nipple for the steering t ie rod ball joints Grease nipples are...
Page 212: ...pindle M G Midget Issue 7 H E 95781 9 55 Later models are fitted with grease retaining caps which must carefully be removed re plenished with grease to Ref C and replaced Be sure to use the correct grease for each purpose see page P I Fig P 13 The grease nipple for the front wheel hub is revealed when the wheel disc is removed The early type Is shown Later hubs are fitted with a grease cap which m...
Page 213: ...cleaner P 6 in fuel Allow the element to drain and dry off thoroughly Examine the oil container for sludge If sludge is present clean out the base and refill with fresh engine oil to the level indicated Fig P 17 The a lr cleaner partly sectioned to show its internal construction and the path taken by the incoming air If no sludge is present merely replenish the oil to bring it to the correct level...
Page 214: ...gun filled with grease to Ref C page P 2 should be applied to the nipple on the wheel hub bearing cap giving one stroke Later models are fitted with grease retaining caps whlch must carefully be removed replenished with grease to Ref C and replaced M G Midget Issue 3 H E 82966 1 54 Fig P lO The dyl1amo beartng lubrication cap must be removed and replenished with grease Seetion P U ENGINE OIL PICK ...
Page 215: ...air lock The later pumps fitted from Engine No XPAGfTFf 31263 are provided with an addltl 0 nal alr release hole in the pump body which renders the pump self priming and these engines require no special priming attention Fig P 23 The com ponent parts of the dry type air cleaners fitted to each individual carbu retter of the M G Midget Series TF cars It is Important to remem ber th at proper functl...
Page 216: ...68965 T122 T 23 30 587 AJASO 9 301583 AJAS024 301586 AJAS020 68823 301203 68827 301224 68829 New Part No 18G371 18G312 18G3S2 18G304 ISG304B lSG304A ISG3H IBG284 18G310 68895 18G264 ISG164E J8Gl64F 18G28S IsczeI AJGS031 Assembly tools Piston ring clamp 18GS5 Clutch plate alignin tool 67833 TI24 18G279 Synchromesh units Tf09 IBG315 Axle preload check tool 68839 18G283 Rear axle pinion pOSitioning f...
Page 217: ... the shaft complete wrth Its bearing oil seal and brake plate support 18GJIO Steering Wheel This extractor has been specially designed to remove the M G steering wheel without damage Dealers who already possess tool 55418 and the attachment Part No 56052 wlll find that this may also be used to withdraw the steering wheel It can also be used to extract Wolseley and Morris steering wheels 68895 Fron...
Page 218: ...amshaft and Crankshaft Sprockets As the timing chain Is of the endless type It Is essential to withdraw both the camshaft and crankshaft sprockets together with the chain in position To do this effectively the use of two extractors Is recommended and an even pull should be applied with each to prevent one or the other ofthe sprockets from sticking or straining the chain by bending For the camshaft...
Page 219: ...rm lies dead flush with the edge of a straight edge placed across the ground end face of the gauge plate centre boss ThIs ensures an equal throw to each release lever and that the pressure plate Is exactly parallel to the flywheel face 18G32S Synchromesh Assembly Tool This tool assists the speedy assembly of the syn chromesh units and Is extremely simple and effective It consIsts of a standard str...
Page 220: ...exceptionally modestlypriced Dealers should purchase In quantities for resale to the Trade and Owners I8GJI5 Peg Spanner for Steerinc Rod Ball Housinc Male This peg spanner is for the purpose of removing or refitting the ball hOUsing to the end of the steering rack The two projeetlng pegs engage the two holes In the ball Rousing and ensure that the ball housing Is firmly tightened IIG311 Spanner f...
Page 221: ... pin damp screw This spanner is specially shaped to suit most models of the new Wolseley and Morris ranges and Is long enough to clear the connecting rod blg end 8G351 Front Camshaft Bearing Reamer 18G314 18G314 Steering Gearbox Pinion Tail Bearing Reamer This reamer is essential to ensure the correct alignment of steering pinion bearings as explained In Section J Q 6 ISG329 18G329 Oil Pump Bush R...
Page 222: ...re titted to the four location holes for the front dampers and the bottom bars to the four location holes or the bottom wishbone pivots using suitable fin dla bolts to ensure that there Is a pilin portion ef the bolts locating the blocks and frame together Full details o the use of these bars or checking are liven In Section S 18G28S Rear Axle Pinion Inner Race F1ttlnC and Withdrawing Tool This to...
Page 223: ...ld range The set 1 supplied complete in a metal retaining box 301075 AJG5031 AJG5031 Wire Wheel Hub Extractor This tool is desIgned to withdraw left hand and rlght hand knock on hubs which are optional fittings on the M G MIdget Series TF Q 8 18G264 18G164 Bevel Pinion Bearine Outer Race Remover basic tool M G MidCet lS ue 11294 10 57 Wishvilles Classic Automobile Library ...
Page 224: ...G164D 18G34A M G HidCet wue 2 11294 10 57 __ SPECL L TOOLS 0 18G164D Bevel Pinion Outer Race Remover Adaptor For use with basic tool 18G264 18G MA Bevel Pinion Flange Wrench Q 9 Wishvilles Classic Automobile Library ...
Page 225: ...ESCREENS The sldescreens are fitted to the doors by socket fittings and slotted brackets which engage locking screws Their fitting and removal from the doors Is straightforward and presents no difficulty When not in use they are stored in the special com partment In the back of the body behind the seat As this compartment has been kept to rnlntrnurn dimensions it is most important that the sldescr...
Page 226: ...chassis frame Extract the two Phillips screws securing the wing to the body and the three nuts bolts and spri ng and fIat R 2 washers securing the wing to the running board and 11ft the wing clear of the car Replacement is carried out in the reverse order to that detailed for removal Section 6 THE REAR WINGS REMOVAL AND REPLACEMENT Remove the nuts screws and flat washers on early models and Philli...
Page 227: ...om the carburetter Disconnect the throttle pedal control and return spring from the carburetter and detach the revolution counter drive cable clip from the dash Disconnect the oil gauge pipe engine revolution counter and speedometer drive cables from the instrurnents Withdraw the Innermost screw from each glove box lid hinge and the eight screws with cup washers securing the facia panel and draw t...
Page 228: ...al methods are employed To facilitate the matching of colours for retouching and respraying minor body repairs small tins of the correct shad e of cellulose enamel are available from the Service Parts Department in i pint pint and gallon sizes The Part No for each colour Is indicated below to facilitate ordering CELLULOSE ENAMELS Colour Part No Black S 145 Autumn Red 54 1 Ivory 54 147 Almond Green...
Page 229: ...e control box Ignition carl and flasher unit Disconnect the flexible oil pipe from the engine and the engine revolution counter drive from the dynamo Withdraw the speedometer drive cable from the dash and coil it over the engine Disconnect the flexible pipe and feed pipe from the fuel pump Slacken off and remove the hand brake cable adjusting nuts and springs Release the outer cables from the abut...
Page 230: ...nt available will naturally determine whether any particular frame is repairable bearing in mind that certain fundamental accuracies must be restored also that the cost of labour and material Involved in effect ing a complete repair is not economically justified if M G Midget Issue 2 H E 91826 255 it exceeds the cost to the user of replacing the entire frame assembly Section S I CHECKING CHASSIS F...
Page 231: ...ion or whether the frame must be strtpped out completely When repairs are under taken with the frame in position the damage should be confined to forward of the front engine bulkhead plate Damage rearwards of the engine bulkhead plate involves the stripping out of the frame This also applies to any damage to the rear end of the frame Alignment Checking the alignment of the bare frame is a relative...
Page 232: ...bar Ia IIEAR OIOSS t i l t _ zP _ J I 10 15 _ _ ____ _ _ 94 wtt Il IlA K _ _ I _ _ l I I TObERANCE ON niESE DIAGQI lAL S 4 f j7 _ I 1 I 1 Fig 5 2 Chassis dimensionill diagram Remove the front suspension and the rear wheels Lower the frame on the three blocks having the dimensions shown in Fig 5 3 These locate the frame in such a posItion that the front cross member should run parallel to the groun...
Page 233: ...blocks at right angles to the frame See Fig 5 5 Similar methods of recovery can be used at any point along the frame It Is necessary when using the jacks to apply sufficient force slightly to over straighten the side members for the frame will spring back when the jack is released It is better to make a recovery In stages rather than to apply too great a force at one effort and consequently have t...
Page 234: ...then be sprung back with sufficient effort applied at the end of the lever Fif S 1 A screw type JackID position to correct front end mlsaUlnment Section S 5 CORRECTING A TWISTED FRAME In the event of the frame being twisted this con dltlon can be corrected by anchoring the frame at If necessary apply well spread heat at the twIsted section As the frame Is completely dismantled It is possible to re...
Page 235: ...al anyframe twist 1 1 t I l III Fig 5 6 A beam and lack may be used for the correction of Ilft or fall in a frame side member The welds can be cleaned up and the repair is then invisible When any adjustment to the frame is carried out do not forget the tight gauge of the material and treat it accordingly Check the wheel camber castor angle king pin angle and front wheel alignment as detailed on pa...
Page 236: ... tJllASSlS FRAME REt AIDS S I i SootiOD S 6 FiniNG A NEW FRONT CROSS MEMBER i I r llt O l t 1 I _ 1 I iI U t I If cl lf o M G Midcet lssue t H E 91826 2 55 5 7 Wishvilles Classic Automobile Library ...
Page 237: ...ate f P 80 Hypoid Hypoy Expee GX Spirax S A E 80 Gear 80 80 Compound 80 80 E P 80 80 C WHEEL HUBS AND FAN BEARINGS All conditions Energreue I Filtrate Arnbroline I Duckham s Castro lease Esso Mobi Igrease I Shell L 3 Super L H T I L B 10 L M Multi M P Retinax Lithium Grease Grease purpose A I Grease I Grease H I I I D STEERING CONNECTIONS KING PINS PROPELLER SHAFT CLEVIS PINS AND LEVER FULCRUMS Al...
Page 238: ...thdraw the rotor ann and add a few drops of thin oil to Ref F to the advance mechanism through the gap around the cam spindle and to the spindle through the cam securing screw duct DYNAMO Remove the grease cap and refill with grease to Ref D AIR CLEANER Clean and re oil EVERY 6 000 MILES 10000 Km EXTERNAL OIL FILTER Fit a new filter throw away type Fit a new filter element renewable element type G...
Page 239: ... C l LUBRICATION CHART _B 1 0 D F TD B EVERY 1 00 0 MILES t 1 J _ T NU U H e li t o F I EVERY 3 000 MILES j 1f ICl OII TlO t J 101 o o A A _ APiW Tl OI To 0 Oftl 10 A LI _ THO G 0 JHll CO 10 T _ COl U rr TO on C AHU nesr 5n MILlS 800 Kill u loo 6NT EVEIn 6 000 MILES IOooe k ill 0 0 0 c L H SH cr TO if D ICVERY 250 HILES t r _ L L 0 N N N H If lei Tk I NO r u 0 EF EVERY SOD H ILES K l GI IE I O 4 S...
Page 240: ...to Ref A DISTRIBUTOR Withdraw the rotor ann and add a few drops of thin oil to Ref F to the advance mechanism through the gap around the cam spindle and to the spindle through the cam securing screw duct DYNAMO Remove the grease cap and refill with grease to Ref D AIR CLEANER Clean and re oil EVERY 6 000 MILES 10000 Km EXTERNAL OIL FILTER Fit a new filter throw away type Fit a new filter element r...
Page 241: ...W J il J 0 1 ne J lj nl o _ 1 d 01 OJ P I M n od u Ol p n l 1 I 1 10 I P r I OA dx _ O I J I p r W JJ I m 11 II I II 1 J R Ie l 0 00 n P II qnl Me e Xl IPl 1 1 1 1 0 o o lI J H u n Q Wishvilles Classic Automobile Library ...
