Related Manuals for David Brown Cropmaster VAK1 Series
Summary of Contents for David Brown Cropmaster VAK1 Series
- Page 1 DAVID BROWN CROPMASTER OPERATING AND MAINTENANCE INSTRUCTIONS VAK1 SERIES SPECIAL INSTRUCTIONS FOR VAG/1C SERIES PETROL ENGINE · \ �. � !la;m,� ,_;: ..���...
- Page 5 PACE 4...
- Page 6 Examine the tractor to ascertain if any damage has occurred in transit, and check the equipment. Report any damage or shortages to your David Brown dealer immediately. Refer to the lubricatio n chart on page (and to page locate all the greasing points, make sure that all nipples are free from dirt and lubricate with the grease gun.
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Page 8: Oil Pressure Indicator
At the end of the first 25 hours' work tighten all the engine bolts (pariicuarly at the cylinder head and manifold); drain, flush-out and refill the sumps and fit a new oil filter element. The gear box should be drained, flushed out and refilled after the first 50 hours of runnin g . -
Page 9: Throttle Control Lever
OPERA.TING THE TR. A. CTOR (Fig. 1) (On models with agricultural lighting only) Marked " S " and " H." With the switch in the " S " position, the rear lamp is on. In the ,: H" position both front and rear lamps will operate. - Page 10 (Fig. 4) (Tractor with standard gearbox ; four speeds forward and one reverse.) The gear lever is mounted in a housing secured to the gearbox cover, on which are cast the gear positions, viz., 1 - 3 To engage reverse do not lift the lever-it is necessary to exert only ·...
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Page 11: Operating The Tractor
OPERATING THE TRACTOR FIG. FIG. 5 PAGE 10... -
Page 12: Starting And Stopping The Engine
Engaging lever identical with the one referred to above, and shown in Fig. 6. The control lever has three positions, indicated on the instruction plate attached to the cover of the unit. With the control lever forward, the pulley and P.T.O. shaft run at low speed; centre is neutral, and rear position is for high speed. -
Page 13: Special Note
Avoid constantly varying the throttle control until the engine is hot, as this will cause incomplete vaporization of the fuel, resulting in irregular running and excessive crankcase dilution. If the engine is reasonably warm (having been stopped for only five or ten minutes) it will restart on vaporizing oil. - Page 15 The David Brown tractor is easy to drive, hut like everything else .it can he done well or badly. Bad driving increases wear-and-tear and repair hills and does not save any working time. Maxims of good driving are :- Avoid sudden acceleration or braking.
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Page 16: Stopping The Tractor
The gear positions for the 4-speed gearbox 1 - 3 and the 6-speed gearbox H- 2 - R are cast on the gearbox cover. NOTE : Operation of the 6-speed gearbox is similar to the 4-speed type. First determine whether a high or low speed is required and, with the clutch pedal depressed, place the left-hand lever in the "H"... - Page 19 GRUSE NIPPLE _P.At,,iSIIAl'T' IRAO<ET) (¼�,�ieta=ri) I;') t"1 � ':!!� ,k'kkio) ♦ 'tP.U!JNJON IACH ENO) r · -- - · �l ti_�E11� [ l � :;e · �I A I I I F ff � ijj: I �\ I// Ej:? ) - \ t -- - � \ ,..,.
- Page 22 Check the pressures, which should be- Land work . . Front 25 lb. sq. inch ; Rear 12 lb. sq. inch. Road work . . Front 25 lb. sq. inch ; Rear 22 lb. sq. inch. NOTE : Inflation pressures must be checked more frequently with water filled tyres.
- Page 23 In addition to the and 60-hour maintenance routines. into a clean container, remove the (3 Stars on lubrication diagram) Apply a little H.M.P. grease to the heel of the rocker cam and to the fibre hush; fill lubricator at base. (See Figs. 8 and 13.) (NOTE: Lubricator fitted to magnetos only.) (if fitted) Check condition of charge and...
- Page 24 It is always advisable to have a spare set of plugs, so that those which have been removed may he properly serviced. David Brown dealers have special equipment for this work. Referring to Fig. 6 and 14 drain -while warm, flush. out and refill with the correct oil (see Page 26).
- Page 25 · Jack up the front of the tractor and examine the steering king pins and front wheel hearings (adjustment of front hub hearings referred to on Page 32). Examine the front axle swivel or trunnion bracket hushes and the steering rods. Have the entire system, including the battery, checked over by an authorised dealer.
- Page 27 The king pins and steering joints are lubricated by grease at the points in Fig. 9. The steering unit is lubricated by mist from the trans• mission and requires no special attention. Trunnion grease points are hown on the lubrication diagra m. Lubricant is applied at the grease nipples (one to each huh) shown in Fig.
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Page 30: Valve Clearances
which is now held out by the smartly running engine. Screw in the thrust " D " until no free movement or slack is apparent on lever " F, " then give the screw " D " two further complete turns inwards, and lock with nut "... - Page 32 NOTE : Do not adjust the gap by bending the centre electrode. This will result in damage to the insulation. .. The sediment howl below fuel change-ove r c ock (Fig. 2) should he taken out and cleaned as necessary. the same time the gauze strainer may he cleaned as recommended for the carburettor strainer,...
- Page 33 Check by turning each wheel by hand. Tighten the locknuts, release the foot brake and spin the wheels to check for freedom. When the brake linings have seen considerable service and require relining, consult a David Brown dealer. DINOR SERVIOE AND ADJUSTMENTS Clutch Brakes •...
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Page 35: Electrical Wiring Diagrams
WIRING DIAGRAM-COIL-AGRICULTURAL LIGHTING AND STARTING WIRING DIAGRAM-MAGNETO--{\.GRICULTURAL LIGHTING AND STARTING Lighting Dynamo Ammeter Blue Headlamp through fuse. Switch. · t o Lighting Blue Rearlamp la Red Ammeter Lighting Switch. Switch. Coil t� D istributor. Silver lb Silver Amineter Ignition Yellow Starter to Ammeter. - Page 39 Check for blocked radiator and flush if necessary. Adjust fan belt, · check lubricant and, if knocking persists, consult a David Brown dealer. Causes are inadequate lubrication of the engine, use of unsuitable lubricating oil, bearing slackness at crankshaft main journals and big ends, or piston slap.
- Page 43 8D, 18 lift 9 ·00-28 1,300 2,000 1·86 2·87 2·72 4·18 4·02 6·19 9·90 15·23 1·24 1·91 Lucas type 4 V.R.A. vertical magneto (with full automatic advance) driven offset dog on pump spindle. Sparking plugs, Champion type Com. Coil ignition with full automatic advance can be supplied as alternative to magneto when electric starting and/or lighting is :fitted.
- Page 44 ABRIDGED SPEOIFIOATION in m.p.h. · 9 ·00-28 Pneumatic Tyres. 1,300 r.p.m. 2,000 r. p .m. 1st gear 1·246 1·917 4·720 1st gear 3·068 3 . 555 2·311 2nd gear 2nd gear 5·693 8·759 4·580 7·046 3rd gear ll ·277 17·350 3rd gear 2·007 3·088...
- Page 45 Standard equipment : 9·00-28 Rear, 6·00-19 Front. Alternative : ll ·25-28 or 11-28 Rear. Tyre pressures - Front - all conditions . . 25 lb. sq. in. Rear - field work 12 lb. sq. in. Rear - road work 22 lb. sq. in. Rear wheel track adjustable from 48 in.
- Page 46 Bolted to rear axle and driven direct from engine. Three-position hand lever control giving low speed, neutral and high speed. P.T.O. Shaft in. diameter, spline 6B), Pulley in. diameter, in. wide. Oil level automatically maintained as with P.T.O. unit. Engine, 1,300 r.p.m. P.T.0.
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Page 47: Fuel System
The specification of the David Brown "Cropmaster" VAG/IC Series is substantially the same as the V AK/IC Series model given in this instruction book except that the engine is designed to run on petrol instead of T.V.O. and is, therefore, provided with a petrol manifold, fuel pump and high compression pistons.