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David Brown Cropmaster VAK1 Series, Инструкция по эксплуатации и техническому обслуживанию, Страница: 44 / 51

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ABRIDGED  SPEOIFIOATION 

Boad  Speeds  (6-speed  Gearbox) 

in  m.p.h.

·9 ·00-28  Pneumatic  Tyres.

1,300 

r.p.m.

2,000 

r.p.m.

1st  gear 

Low 

1·246 

1·917 

1st  gear 

HIGH 

3·068 

4·720 

2nd gear 

Low 

2·311 

3.555 

2nd gear 

HIGH 

5·693 

8·759 

3rd  gear 

Low 

4·580 

7·046 

3rd  gear 

HIGH 

ll ·277 

17·350 

Reverse 

Low 

2·007 

3·088 

Reverse 

HIGH 

4.943 

7·605 

Bear  Axle  and Final Brive 

Offset  rear  axle  casing  surrounds  the  differential  and  supports  at  its 

· outer  ends,  spur gear  reduction  units,  the  drive  shafts  to  these units being

spline-coupled  to  the  differential  bevel  wheels.  Hubs  integral  with  final

drive  shafts.  Oil capacity of reduction units 2 pints  each.  Totally enclosed

internal  expanding  brakes  are  fitted  to  each  drive  shaft  of  the  reduction

units,  both  operated  by  a  foot  pedal  and  independently  by  hand.  Catch

pawl  operates  on foot  pedal  for  parking purposes.

Frame 

Designed  to  comprise  engine  and  transmission  casings  and  to  carry 

radiator  and  provide  front  axle  fixing.  Top  face  is  ground to  take  engine, 

clutch cover� gearbox and gearbox c0ver, while rear end is machined to take 

rear  axle  casing. 

Front  Axle  and Steerin.g 

Square  construction,  off set  pivot  fixing  ( at  front  to  frame  and  in 

separate  bracket  at  rear).  King  pins  integral  with  stub  axles,  inserted 

from  below  pivot  eyes.  Bronze  bushes  at  centre  pivots  and  king  pi;ns. 

Front  huhs  supported  on  Timken  taper  roller  bearings.  Steering  arms 

fitted to upper  portions  of king pins by  serrations and clamp bolts.  Track 

and  side  steering  rods  tubular  and  fitted  with  self-adjusting  hall  joints. 

Steering  unit  of  screw  and  nut  type  with  column  floating  on  single  self­

aligning  bearing  under  steering  wheel.  Drop  arm  serrated  to  rocker  shaft 

• 

carried in self-lubricating bushes.  Steering  wheel,  18 in.  diameter. 

PAGE  43 

Содержание Cropmaster VAK1 Series

Страница 1: ...I I I I I I I I I I I I I I I I I I I DAVID BROWN CROPMASTER OPERATING AND MAINTENANCE INSTRUCTIONS VAK1 SERIES SPECIAL INSTRUCTIONS FOR VAG 1C SERIES PETROL ENGINE __ la m _ I t j...

Страница 2: ...I I I I I I I I I I I I I I I I Operatin g an d Mai ntena n c e In s tr u cti ons for V A Ii l 0 Ser i e s a nd Special Instruc tions for VA G 10 Serie s wiih Pe trot Engi ne I DAVID BROWN TRACTons LT...

Страница 3: ...ork read the items detailed in Bold Type in the Contents Section on Page 3 If the Tractor is a VAG IC fit st read the special in tructions for this model on page 46 The Service Department at Mel tham...

Страница 4: ...he end of every Season Filling Greasing and Draining Points Approved Lubricants Storing the Tractor 1 1INOR SERVICE AND ADJUSTMENTS Engine Fuel System Ignition System Clutch Brakes Front Wheels Front...

Страница 5: ...I I I I I I I I I I I I I I I I I I I PACE 4...

Страница 6: ...bricate with the grease gun Check the oil levels in the engine transmission air cleaner reductions power take off and pulley if fitted check all drain plugs for tightness Cooling Sustem Close the cyli...

Страница 7: ...PAGE 6 I I I I I I I I I I I I I I I I I I I...

Страница 8: ...cold air drawn into the carburettor For adjustment see Starting and Stopping the Engine lgnitio11 Switch Fig 1 This is of the rotary type When magneto ignition is fitted the flats must be horizontal f...

Страница 9: ...iment bowl and filter to trap dirt and water Radiator Blind Control Fig 3 The grip is attached to a cable which controls the blind and four positions are provided on the bracket attached to the fuel t...

Страница 10: ...Gear positions are as shown The main gearbox lever has 3 forward and 1 reverse gear positions namely 2 R 3 1 The H High and L Low positions of the left hand lever are indicated Steering Hand Brake Le...

Страница 11: ...OPERATING THE TRACTOR FIG 4 PAGE 10 FIG 5 I I I I I I I I I I I I I I I I I I I...

Страница 12: ...this causes a heavy drain on the battery Starting from cold I Put the gear lever in neutral 2 Close the radiator blind 3 Close the choke by pulling the control outwards and close the pre heater regula...

Страница 13: ...stopped for only five or ten minutes it will restart on vaporizing oil The radiator blind should he closed to warm up quickly Stopping the Engine If it is known that the engine is to be stopped long...

Страница 14: ...for which there may be no cure except a new block When using anti freeze affix a label to the radiator cap to guard against draining and loss of anti freeze solution OA lJTIONS Repeated here are the t...

Страница 15: ...catch If starting up hill release the footbrake and the clutch pedal together so that the engine commences to take up the drive while the brakes are being released 11se of Clutch Pedal When starting...

Страница 16: ...is always possible to move the tractor gently forward or backward and to pull the steering wheel round progressively as the tractor moves llse of Engine Controls The life of the engine can be safeguar...

Страница 17: ...ull range of wheel settings for all purposes is provided with each Tractor Special attention is drawn to the changing over of pneumatic tyres to ensure correct direction of rotation When it is necessa...

Страница 18: ...d gearboxes P T O OR P T O A ND BELT PULLEY Fitting Instructions Drain oil from transmission case and remove rear axle cover plate Clean the machined surface of the axle and if necessary fit new gaske...

Страница 19: ...f I I t J AIRCL ANl RL l T GRUSE NIPPLE _P At iSIIAl T IRAO ET THE SYMBOL AGAINST EACH POINT DENOTES THE PERICO OF MAINTENANCE AS FOLLOWS EVERY OAY OS 10 t lOURS 0 OPERATION EVERY WEEK OR GO HOURS OF...

Страница 20: ...in the radiator and top up if necessary Check the oil level in the engine and top up if necessary with the correct oil See Fig 8 and Page 6 Thfa may not require topping up every evening hut a check o...

Страница 21: ...e the cleaner element flush with clean paraffin or vaponzmg oil allow to drain and replace See Fig 12 Gearbox and Final Reduction Housings Check the oil level and top up if necessary with the correct...

Страница 22: ...flation pressures must be checked more frequently with water filled tyres Cleaning Clean the tractor as thoroughly as possible Nuts anti Bolts Check all nuts and bolts for tightness Controls Clean all...

Страница 23: ...n oil from transmission and power lift sump see Fig 14 into a clean container remove the power lift sump plate which releases the gauze and magnetic filter from the power lift suction pipe The magneti...

Страница 24: ...and reset the sparking plug gaps to 0 030 taking care not to bend the centre electrodes It is always advisable to have a spare set of plugs so that those which have been removed may he properly servi...

Страница 25: ...s Electrical System Have the entire system including the battery checked over by an authorised dealer Inspection Carefully examine the tractor for oil leaks Check the brakes throttle blind and choke c...

Страница 26: ...urettor mid position is OFF and front is for vaporizing oil The carburettor drain tap is showq in Fig 10 Air Cleaner The base may he removed by releasing the clamps Fig 10 Engine The filler and dipsti...

Страница 27: ...ricator NOTE Lubricator fitted on magnetos only Electrical Equipment The dynamo lubrication points are shown in Fig 10 Po P r Lift R111nsl111ft and Linl agp Lubrication points are indicated in Fig 6 T...

Страница 28: ...ater from the radiator and cylinder block flush the system with clean water and allow to drain Fill the fuel tanks to the brim to prevent collection of moisture by condensation Grease all points fitte...

Страница 29: ...The fan belt should never he run taut Undue slackness is taken up by releasing the setscrew securing the front half of the pulley to the fan hub rotate the front half of the pulley clockwise keeping t...

Страница 30: ...r p m is achieved and tighten locknut N See that the governor to throttle rod ball joint A Fig 15 is free from dirt FIG 15 Manifold Remove carbon from the hot spot chamber after withdrawing the four...

Страница 31: ...obtain access to the jets the latter only if partial blocking is suspected remove the lower half of the carburettor by disconnecting the choke control releasing the clips on the air intake hose and sl...

Страница 32: ...ure that the carbon brush in the distributor cap slides freely The same instructions apply to the distributor when this is fitted in conjunction with coil ignition Sparl ing Plugs These are the detach...

Страница 33: ...brake when it will immediately be noticed whether the tractor has a tendency to slew to one side or fails to stop in a reasonable distance The brake on the side to which it slews will be aeting harde...

Страница 34: ...hes should be bedded in by a David Brown dealer Battery The battery requires regular attention as follows Check the level of the acid solution topping up with clean distilled water Do not let the leve...

Страница 35: ...Tlll PULL AMMlTlR SWITCM Headlamp to Lighting Switch Rearlamp to Lighting Switch Coil t Distributor Starter to Ammeter All Earth Returns WIRING DIAGRAM MAGNETO GRICULTURAL LIGHTING AND STARTING Hr LEA...

Страница 36: ...Fuse 2 Yellow Starter to Ammeter AMMETER IGNITION SWl1 Clf 3 Purple Ignition Switch to Mag neto 4 Black All earth leads WIRING DIAGRAM COIL IGNITION STARTING ONLY 2 3 l Red Dynamo to Ammeter through...

Страница 37: ...hether from fuel oil or water and check for fuel or mechanical fault as described later When the plugs are cleaned and adjusted place them on their sides on the cylinder head with the leads attached a...

Страница 38: ...factory check the flow of vaporizing oil in a similar manner Examine the filter in the carburettor banjo and while this is disconnected open the fuel cock No flow indicates blocked fuel ph es or that...

Страница 39: ...n previous section also see below Apparent lacl of power at intervals Mechanical This may result from inadequate lubrication of the engine causing partial seizure Inspect sump level and condition of o...

Страница 40: ...be due to 1 Electrolite not up to level see Battery Page 33 2 dirty or loose battery con nections 3 excessive use of the starter motor 4 dynamo not charging see Dynamo Page 33 or 5 wiring short circu...

Страница 41: ...failure of Pinion to engage witli Flgwheel 6ear Probable causes 1 Partly discharged battery 2 battery terminals loose or dirty 3 partially seized starter pinion remove clean and lubricate with thin oi...

Страница 42: ...D C closes 35 after B D C Exhaust opens 42 before B D C closes T n C Single valve springs split cotters clearance adjusting screws at rockers Lubrication Full force feed to crankshaft and camshaft be...

Страница 43: ...city jets of cool water on to exhaust valve seatings and sparking plug bosses Capacity of system 6 gallons Radiator blind operated by cable from side of dash Thermometer fitted to water outlet pipe fr...

Страница 44: ...l and independently by hand Catch pawl operates on foot pedal for parking purposes Frame Designed to comprise engine and transmission casings and to carry radiator and provide front axle fixing Top fa...

Страница 45: ...itional equipment Power Lift Incorporated in transmission unit Hydraulically operated by gear type pump and provided with overload release valve Magnetic and gauze filters at pump inlet Maximum effort...

Страница 46: ...as with P T O unit Speeds Low speed High speed Low speed High speed Engine 1 300 r p m P T 0 SHAFT PULLEY R P M 484 718 R P M 993 1 480 Engine 2 000 r p m P T 0 SHAFT PULLEY R P M 744 1 105 R P M 1 5...

Страница 47: ...ap positions are as follows Forward l lain Tank Rear Reserve Tank Mid Position OFF Fuel Pump A fuel pump is mounted on the off side of the cylinder block To prime the carburettor cepre3s and release t...

Страница 48: ...and pull smartly upwards until the engine fires 8 Open the choke by pushing control inwards 9 Check for oil pressure by noting the position of the pressure indicator button which should he out To ens...

Страница 49: ...ing Points 25 Driving the Tractor 14 Dynamo 22 33 39 PAGE 48 PAGE Electrical System 24 26 33 39 40 Engine 11 12 15 20 25 28 36 Fan Belt 28 Filling Points 25 Filters 8 13 22 23 28 Final Reduction Units...

Страница 50: ...ntenance 19 Switch Ignition 7 Manifolds 29 Switch Lamp 8 I I Oil Capacities 26 Tappet Clearances 29 Oil Cleaner 20 28 Temperature Indicator 8 I Oil Pressure Indicator 7 Terminals 33 Oil Strainers 28 T...

Страница 51: ......

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