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Page 3: ...e clutch except when actually starting off o r changing gear change down in traffic t o bottom gear if necessary Do not subject the tyres t o glancing blows from the kerb when drawing up beside the pa...
Page 4: ...o the lnstruction Book can be of considerable value as it points out both to the owner and repair shops unacquainted with the construction of the car the correct method of procedure There are a number...
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Page 6: ...ng I t must be remembered that the car should not be moved in any way when the gearbox and back axle are filled otherwise additional lubricant may be carried round by the teeth of the gears thus causi...
Page 7: ...Shell Gear Oil Mobiloil C Gearbox C W Speedolene H Hub Grease Duckham s Adcol HBB Universal Joints Duckham s Hardy Spicer Grease Great care should be exercised in mixing oils at all and it is far pref...
Page 8: ...iew of the M G Magnette chassis a s seen from below As the position of batteries differs on models these must be considered as of one type only It is possible t o see from this illustration the positi...
Page 9: ...m the timing gears The water pump is shown in the illustration coupled t o the radiator by means o f a rubber hose O n certain models an adjustable thermostat is fitted t o control the water temperatu...
Page 10: ...near side of the engine showing position of the self starter operated through the solenoid The central ised position of the oiling nipples will be seen on the dashboard bracket from which pipes conve...
Page 11: ...the top left of the illustration the Petrolift will be noticed which is electric ally operated The lubrication of the spring anchorages and certain other parts are carried out from the centrally locat...
Page 12: ...i o n 5 A more detailed view of the components of the off side of the engine The water drain tap is placed below the radiator also shown in lllustration No 14 The position of the magneto drive through...
Page 13: ...ing box is lubricated from the central lubricating nipple C The next illustration No 6 deals particularly with the view of the dashboard steering column clutch brake and accelerator pedals gearbox and...
Page 14: ...the metal covered dashboard In both types of gearbox employed in this chassis the filler orifice is situated on the near side The adjustment for taking up wear of the hand brake is effected by means o...
Page 15: ...Gearbox extension with remote gear control showing reverse catch and speedometer connection General view of manual gearbox mounted in the frame showing oil filler and grouped controls Page Twelve...
Page 16: ...the shaft tunnel and that they require lubrication occasionally through holes suitably provided Illustration 9 View of the rear end of the chassis showing location of the batteries when these are fit...
Page 17: ...nd shock absorber mounting lllustration No 9 is a view o f the rear end of the frame as seen after the body has been removed It shows the propeller shaft uncoupled from the rear axle the position o f...
Page 18: ...e passes t o the anchorage underneath the axle and the manner In which the rear brakes are applied can clearly be seen Illustration No 12 is a view well worth studying as it shows that the springs are...
Page 19: ...he off side steering arm which is in turn coupled t o the steering head and the track rod Every articulating joint o f the steering is fitted with an oil nipple The track rod is threaded at either end...
Page 20: ...the steering rods should be examined I l l u s t r a t i o n 14 View of the front end of the chassis as seen from below The spring mounting will be noted including rebound spring clips General steerin...
Page 21: ...absorbers are parallel w i t h the chassis instead of transverse lllustration No 13 also affords an excellent opportunity of seeing how the brake cables pass from inside the frame through a bracket at...
Page 22: ...rom either side of the centre of the chassis t o the brake drums the final application being shown in lllustration No 15 A sketch is provided on page 22 showing diagrammatically how the brakes are app...
Page 23: ...an be adjusted on its thread by the amount required and the lock nut re tightened The whole o f the brake cross shaft is lubricated from one o f the dashboard nipples and in order t o give perfect fre...
Page 24: ...in spanner and after releasing the brake the drum can be withdrawn by a slight tapping on the ribs with a wooden mallet o r a piece of wood and a hammer The brake drum and its components are shown in...
Page 25: ...ad weights however are in effect left behind by the vibrating shoes and energy is wasted in friction between the weights and the shoes The conditions under which the weights are mounted can in practic...
Page 26: ...s of course important t o see that the valve is properly seating when any adjustment is attempted and this can easily be seen by the position of the cam in relation t o the rocker There is a single ca...
Page 27: ...stem is also adjusted A special gauge has t o be employed for this purpose consisting of a horse shoe shaped piece of metal which when resting on the cylinder head gauges the exact length of the valve...
Page 28: ...with a lesser degree of acceleration and speed and sometimes in hot weather general all round better carburation can be obtained by thus cutting down the petrol supply Screwing up too much may cause...
Page 29: ...ame way as originally fitted D o not change the suction chambers from one carburetter t o another Sources o f Trouble There are only four troubles which may affect the functioning of the S U carburett...
Page 30: ...perfectly petrol tight by means of two cork washers which are forced against the sides of the jet by a coil spring and conical washers If the jet is dismantled great care must be taken not to lose th...
Page 31: ...nting which is due t o rich mixture screw one of the jet adjusting nuts up making sure that the jet is pushed up also If this makes no improvement return it t o its original position and t r y the sam...
Page 32: ...hereby governing the petrol flow It will be realised by this illustration that the effect of screwing the jet adjusting nut up o r down has actually no effect on the jet itself it is simply an abutmen...
Page 33: ...control is t o enrich the mixture when starting If it is left in operation longer than is necessary the cylinder walls will be bathed with surplus petrol which will soon have a damaging effect on the...
Page 34: ...it is very simply effected by removing the nut on the top of the float chamber and removal of the petrol pipe union The jet control arrangements are shown in Illustration No 21b SUCTION CHAMBER L PIS...
Page 35: ...o remove the pins from the front and rear carburetters and alter the position of the yoke ends so that the pins which couple them t o the jet control levers pass through freely It is possible with th...
Page 36: ...e flywheel when the 1 1 6 marking is in the centre of the clutch inspection aperture and the inlet valve of No 6 is opening and the contact breaker arm pointing towards No I plug segment Then after sl...
Page 37: ...casionally remove the distributor moulding by pushing aside its t w o securing springs See that the electrodes are clean and free from deposit If necessary wipe out the distributor with a dry duster a...
Page 38: ...if the contacts are not kept clean The contact breaker gap is carefully set before leaving the Works and a gauge is provided on the spanner dispatched with each distributor Provided that the cam is k...
Page 39: ...ugs If the rubber shows signs of deterioration or cracking the cable should be renewed Remove the distributor moulding and examine the contacts if necessary clean them as described on page xxxi Turn t...
Page 40: ...Only a very occasional lubrication is required and a high quality machine oil introduced into the oiling apertures t w o or three drops at a time The magneto is attached by means of set screws fitted...
Page 41: ...subsequently given concerning the items of magneto and dynamo The principal points of interest in this illustration are the location of the oil filler and the sump The majority of the details shown i...
Page 42: ...rs The manner in which the oil is delivered t o the t w o centre and rear main bearings will be seen subsequently as well as the details of the oil filters The filter is fitted with a cover plate the...
Page 43: ...hand side of the illustration and the return oil pipe feed which conveys part of the surplus oil back t o the magneto drive at the same time being of sufficient diameter t o effect a release for crank...
Page 44: ...r the cover has been removed The valve cover is held in position by six nuts which should be tightened up evenly so that a good joint between the cover and the cork washer fitted on top of the cylinde...
Page 45: ...held in position by t w o studs and one bolt and there is a distance plate between the starter housing and the flywheel housing The flywheel teeth can be seen and also the spiral thread on the extens...
Page 46: ...ans o f a bridge piece the front end o f the engine extension bracket is attached t o the cross member bushes being interposed t o afford a certain amount o f resiliency t o the mounting and isolate t...
Page 47: ...op of the dynamo and the position of the piston in the cylinder The firing order is 1 4 2 6 3 5 Illustration 28 This should be carefully studied because it has t o d o with the timing o f the valves a...
Page 48: ...ngines Illustration 29 View o f the cylinder head partially removed from the cylinders This is a view of the inlet side of the engine the pipe on the left hand side of the illustration is a return fee...
Page 49: ...ing water t o the head The coupling for the overhead camshaft will also be seen ALWAYS REPLACE GASKET CORRECTLY NOTCH NOTE SLOT I l l u s t r a t i o n 31 Plan view of the cylinder block and the gaske...
Page 50: ...from the cylinder body through the gasket t o the cylinder head The right hand side illustration shows the coupling attached t o the pinion shaft which operates the overhead gears lllustration 32 Pla...
Page 51: ...the rockers and remaining bearings Illustration 34 View of the underneath side of the cylinder head with complete camshaft drive removed A separate unit has been dismantled the parts being as follows...
Page 52: ...has been lifted Particular note should be made of the thrust on the front end of the camshaft and be sure that this registers properly when the latter is reinstated The number of washers will be seen...
Page 53: ...n 35 This illustration is primarily intended t o show the position of the suction filter inside the engine also how the magneto bracket is bolted t o the base chamber It will be noted that the oil pum...
Page 54: ...of the pump spindle is castellated and registers inside the lower extension of the magneto drive which is shown in Illustration NO 36 coupled t o the pump thus forming a single unit and driven by the...
Page 55: ...nkshaft as seen in lllustration No 37 The forward end thrust of the crankshaft is taken through a hardened steel washer butting up against the white metal of the front main bearing The rearward thrust...
Page 56: ...ws but whenever this is done it is as well t o mark how they come out so that they can be properly re engaged in relation t o the proper firing order It is always possible t o increase the amount of a...
Page 57: ...thin metal shims The dynamo gear is attached t o the spindle by means of a bolt and tab washer the gear being held in position on the shaft by means of a key The gears are suitably marked for re mesh...
Page 58: ...small items which really only concern the Repair Shop They relate to the removal of the gear wheels from the crankshaft and the front end housing of the base chamber After the dynamo has been removed...
Page 59: ...lical bevel wheel is a tight fit on the shaft held in position by a key and it is necessary t o utilise a wheel removal tool similar t o that shown in order t o extract this The principal parts are a...
Page 60: ...ration 43 View of the front part of the engine showing the position of the oil pump which is connected to the sump by the oil suction pipe and the external view of the oil filter which has unions mark...
Page 61: ...ve as can be seen in Illustration No 44 consists of a cover which encloses a spring and maintains the small piston up against a seating in the pump body until such time as either the force of the oil...
Page 62: ...re held in position by long bolts which pass through them and a view o f the crankshaft after it has been removed is shown in lllustration No 47 which shows the crankshaft front end housing with its b...
Page 63: ...sleeve t o receive the flywheel The front end main bearing is white metal lined Before dealing with the rear main bearing and its construction it may be as well t o examine the crankshaft two views of...
Page 64: ...e in the slot in the crankshaft 3 so that the lubricant which is delivered t o the union on the rear main bearing I passes through hole 2 and into the hollow crankshaft in order t o lubricate the big...
Page 65: ...re the bearing has been refitted and omission t o clear the crankshaft has only resulted in the bearing running immediately after reassembly If ever a bearing runs it is necessary t o see that all the...
Page 66: ...one being a scraper ring The gudgeon pin is free t o rotate in the piston boss and the small end bearing of the connecting rod Duralumin end caps are pressed into the gudgeon pins so that these can co...
Page 67: ...head drain pipe joint front bottom 13 Ditto front top 14 Ditto bottom rear of washers used 15 Joint for oil gauge adaptor 16 Exhaust manifold joint front 17 Ditto intermediate 18 Ditto rear 19 Valve...
Page 68: ...e clutch pedal when driving TOdo so will overheat the withdrawal and induce clutch slip Before proceeding with a description o f the clutch it is as well for a moment t o study the details shown in ll...
Page 69: ...eel and as has been previously explained are a sliding fit on the front end extension of the gearbox shaft The clutch cover plate centre plate and the pressure plate are each fitted with Ferodo discs...
Page 70: ...led by the adjusting screw carried in the withdrawal arms which can be clearly seen in lllustration No 55 Pressure on the clutch pedal forces the withdrawal arms forward and in turn these force the ad...
Page 71: ...utch inspection cover ADJUSTER Illustration 56 In order t o show the clutch withdrawal and t h e action of t h e clutch pedal inspect t h e left hand illustration The clutch pedal is coupled t o a sha...
Page 72: ...D O N T FORGET T O LUBRICATE T H E CLtJTCH THRUST RACE EVERY 2000 MILES cars with manual gearbox only Page Sixty A...
Page 73: ...shown in Illustration No 59 lllustration 57 The external view of the gearbox showing the position of the oil filler The gearbox is bolted to the flywheel housing through which the unit support tube p...
Page 74: ...g the gearbox there is no necessity t o remove the nuts marked A and it will be noticed that the rear end housing o f the gearbox is provided with lugs so that the rear end cover cap is removed by tap...
Page 75: ...pt third gear this third gear on the layshaft simply rotates on its sleeve In order t o make the matter clearer the user should now refer t o Illustration No 59 which shows the layshaft train o f gear...
Page 76: ...ar springs and the rise and fall o f the axle I t is necessary t o keep this sliding coupling joint lubricated and in lllustration No 64 the nipple for this purpose is provided access t o it being obt...
Page 77: ...ION DRUM I l l u s t r a t i o n 65 View of the rear axle removed from the chassis which needs no description The principal detail of the rear axle that the user should note is the manner in which the...
Page 78: ...uld be unscrewed and sufficient let out to reduce the level to its proper height otherwise the oil will run along the axle shafts and possibly through the bearings on to the brakes Illustration 66 Vie...
Page 79: ...s a picture o f the rear axle casing with the complete differential assembly removed and one axle shaft and hub removed as well Before the differential can be withdrawn it is necessary t o withdraw bo...
Page 80: ...ell t o examine Illustration No 69 which shows the correct type of tool t o use for removing the bearing nut Primarily the illustration is intended to show the components of an axle shaft the outer be...
Page 81: ...ting a wheel locking nut on the hub giving it a good blow with a copper hammer on alternate ears It is as well t o know that the outer ball bearings are provided with felt washers o r glands t o preve...
Page 82: ...g at one end and radial and thrust bearing at the other Suspension As was mentioned in the opening chapters no useful purpose could be served by repeating illustrations and in consequence it is necess...
Page 83: ...it is possible t o make a hub drawer by tapping a wheel cap in the manner shown in lllustration No 73 Note The rear hub is fitted on t o the rear axle shaft under considerable pressure so that the ty...
Page 84: ...ece 5 and then the small ball bearing 6 which is fitted into the outer portion of the hub the whole unit being locked up by the nut 8 and the washer 7 which has an integral key which registers in a ke...
Page 85: ...Page Seventy two A...
Page 86: ...e synchronisation of the main clutch with the pre selector gearbox clutches The main clutch is connected t o the pre selector clutches by a link motion so arranged that on depressing the clutch pedal...
Page 87: ...In Illustration No 74 it will be seen that the connecting link between the clutch pedal mechanism and the gear changing lever is threaded for a portion having a nut fitted either side o f a stop brack...
Page 88: ...position or reverse should it be required and depress the pedal t o its full extent and release it controlling the final part of the upward stroke of the pedal as one would when engaging a normal clu...
Page 89: ...tly depressed When changing down care should be exercised t o see that the speed of the car is not greater than the equivalent engine speed for example if the car is running at 30 miles an hour it wou...
Page 90: ...the tubular cross member by which the unit is supported in the frame In Illustration A the remote control tunnel supports the selector link which effects the gear selection The shape of the front end...
Page 91: ...nit has t o be dismantled at any time the adjustment is provided should the position of the gear selector lever not synchronise w i t h the position of the selector control lever Illustration C Off si...
Page 92: ...exercised to see that the adjustment with the length of the selector link rod is not altered The remaining controls operating through the tunnel are the engine slow running petrol tap change over and...
Page 93: ...w o gears t o be engaged at once Their action is entirely automatic and the manner in which they are worked will be described later The second question which was asked earlier was What is the action o...
Page 94: ...is the view of the gearbox taken from below and is really so far as the reader is concerned upside down W i t h this in mind pass t o lllustration F and first of all look at the part marked I Busbar a...
Page 95: ...ed was What was the action of the camshaft This action will now be made clear when it is realised that the flat springs inside the box which are allowed t o move forward when they drop into a notch in...
Page 96: ...al of the gearbox cover lid Follow the arrows t o these parts automatic adjusting nut adjuster ring adjusting set screw tail plate and spring then note the slot in the adjuster ring and the part marke...
Page 97: ...opposite end of the adjuster ring will come in contact with what is known as the tail plate and rock the adjuster ring in the opposite direction and tend t o tighten it round on the thread of the lin...
Page 98: ...h fits inside the pump plunger extension so that with every revolution of the engine a plunger which fits into an oscillating housing is caused t o rise and fall This sucks up oil through a small hole...
Page 99: ...pedal t o its full extent when making a change of gear and do not rest your foot on the pedal after the change is made Always remember that it is the end of the upward stroke of the pedal which decid...
Page 100: ...justed the follower unit should be a free sliding fit in the centre portion of the track t o ensure a free passage of oil between the surfaces but only a minimum of sideplay should be permitted Too cl...
Page 101: ...cone in the top of the drop arm t o the rocker shaft Before tightening up however the following check should always be carried out The front wheels still being jacked up with the steering wheel pull t...
Page 102: ...ion when the pedal is pushed down preparatory t o engaging second gear These series of illustrations clearly show the action of the busbar during the gear changing operations the same lettering has be...
Page 103: ...utput shaft is turned in the same direction at a lower speed with a consequent increase In torque due t o the simple train of epicyclic gears Second Gear Sun wheels B and D are both driven by the same...
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Page 105: ...ations Nos 76 and 77 while the wiring can easily be traced on the wiring diagram lllustration 75 Facia board showing position of the various instruments Dynamo The dynamo is mounted on a platform at t...
Page 106: ...t view of switchboard and instrument panel The key locks the ignition lights and starter Illustration 77 Rear view of instrument panel showing wiring and the position of the magneto earth wire termina...
Page 107: ...n contact with the commutator should appear uniformly polished Dirty brushes may be cleaned with a cloth moistened with petrol If any of the brushes become so badly worn that it is necessary t o repla...
Page 108: ...nsert brushes of a grade other than that supplied with the machine o r t o change the tension springs The arrangement provided has been made only after many years experience and will be found t o give...
Page 109: ...miliar with the operation Dynamo Field Fuse A fuse is provided in the dynamo field circuit t o protect the machine in the event of anything being wrong in the charging circuit e g a loose o r broken b...
Page 110: ...he engine thus releasing the dynamo Lift the dynamo approximately a quarter of an inch and tilt it towards the near side of the car until the driving yoke on the dynamo is just clear of that on the cy...
Page 111: ...e distance washers are in the correct position the flexible coupling should run absolutely true If it does not do so note where the error is and adjust the distance washers accordingly Then replace th...
Page 112: ...Lucas Rotax Service Station The Cut out The function o f the cut out is t o close the charging circuit as the increased engine speed when the car is starting causes the dynarno voltage t o rise above...
Page 113: ...s cell or there may be a short between the plates In the latter case the battery should be examined as soon as possible by a Lucas Rotax Service Station Finally see that the tops of the cells are clea...
Page 114: ...e insulating washer on the bulb holder terminal against the spring until the cable hole is exposed Thread the cable end through the hole release the pressure on washer when the cable will be securely...
Page 115: ...It is however important that the engine should never be started with the ignition advanced as owing t o the high starting torque of the starter a back fire would possibly damage the spindle The armatu...
Page 116: ...rburetter petrol supply sparking plugs etc Examine the high tension cables i e cables from the magneto t o the plugs If the rubber shows signs of deterioration o r cracking the cable should be renewed...
Page 117: ...cap of the pump and the cork float when it will be possible t o push the plunger C through the bottom after which a clean rag can be drawn through the bore of the pump Note when assembling the plunge...
Page 118: ...Top cover R Cork float F Plunger T Bolt holding U Filter bowl Unscrewing Y Foot valve pcrmits removal C Plunger and F Valve and E Valve Illustration 82 Sectional view of S U petrolift Page One Hundre...
Page 119: ...ding the inlet ring when the casing can be drawn off and the internal parts of the electrical equipment and connections inspected Care must be taken t o see that the cork gland washer which makes a pe...
Page 120: ...f the cage is a light spring J which rests on the suction valve K the latter being a similar disc resting on a seating machined in the body Holes connect the space between the valves t o the pumping c...
Page 121: ...through the points and to earth thus energising the magnet and attracting the armature This comes forward bringing the diaphragm with it and sucking petrol through the suction valve into the pumping...
Page 122: ...when it will probably be found that the tips of the inner rocker are making contact with the magnet housing If they are not it will be necessary t o remove the whole magnet assembly dismantle it and s...
Page 123: ...arting at a point diametrically opposite the valve and pushing the edge down into the well of the rim If this is done the last few inches can be fitted without using levers If levers are used do not u...
Page 124: ...from between the sticks except o f course the one with the window in it and then the hood bag will go on easily Bonnet Fasteners To undo the bonnet fasteners these should simply be turned in an anti c...
Page 125: ...ussell Buildings School Lane LONDON University Motors Ltd Stratton House Piccadilly W I 9 Jarvis Sons Ltd Victoria Crescent Wimbledon S W 19 MAIDEN HEAD Hewens Garages Ltd MANCHESTER J Cockshoot Co Lt...
Page 126: ...r Street CHESTERFIELD Cavendish Motors Ltd Holywell Street CHIPPENHAM Barnes Motor Works Ltd 21 New Road C O B H A M Surrey Cobham Motor Works Portsmouth Road DERBY Sanderson Holmes Ltd London Road DO...
Page 127: ...P Heaps Garage Openshaw Ltd 1559 Ashton O l d Road Nr Openshaw MANSFIELD North Notts Motors Nottingham Road MIDDLESBROUGH Fred W Dixon Park Garage Linthorpe Road MONTROSE Duthie Son High Street NEWBUR...
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Page 129: ...Alfred J Rees Son Bishop Street Moorfields Telephone 5174 2 lines CARDIFF Serck Radiators Ltd 60a Clive Road Canton Telephone 6124 Central Telegroms Serckrad COVENTRY Coventry Radiator Presswork Co Lt...
Page 130: ...egrams Benzina 9 LEICESTER Victory Radiator Welding Works Woodgate Telephone 20180 20189 10 LEIGH ON SEA J Keeling Son Scarborough Drive London Road Telephone 75229 II LIVERPOOL W Watson Co Liverpool...
Page 131: ...U N...
