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Brake Shoe Removal and Replacement

After the brake plate has been removed from the wheel, the brake cam lever should

be detached and the cam spindle pushed in slightly to allow the shoes to clear the

brake plate.  Insert a screwdriver between the brake shoes at the fulcrum pin and twist

the screwdriver.

Place a small lever between one of the shoes and the cover plate and lever the

shoe away from the plate until the spring pressure is released.  Both shoes can then be

lifted away from the cover plate.

The shoes can then be replaced by the reverse procedure.  Hook the springs on

to the shoes and place the ends of the shoes in position on the fulcrum pin and cam

lever.  Then push the shoes outwards until the springs pull them into their correct

position.

N

OTE

:—The brake shoe springs are quite strong and care should be taken that

the fingers are not trapped by the brake shoes during these operations.

Brake Shoe Relining

With the shoes removed the linings can best be removed by drilling away the heads

of the rivets and punching the shanks out to the inside of the shoes with a suitable

drift.

New linings are die pressed to suit the curvature of the shoes, but will require

drilling and counter-boring for the rivets.  Position the lining and hold it in place at

one end by means of clamps.  Using the holes in the shoes as guides, drill holes of the

correct size for the rivets adjacent to the clamp.  Turn the shoe over, and counter-bore

the holes just drilled sufficiently deep so that the rivet heads will stand below the

lining surface; this is important, since the rivets will otherwise score the brake drum.

Insert the rivets into the holes and rivet them over on the inside of the shoe.

This is easily accomplished by holding in a vice a short length of rod, whose diameter

is equal to that of the rivet head, and using it as an anvil upon which to rest the rivet

head while hammering the shank over.  This will also make sure that the rivets do not

stand proud of the lining.

Move the clamps to the next pair of holes, taking care that the lining is kept in

firm contact with the shoe the whole time, and repeat the above procedure.  When the

lining is finally riveted down, bevel off the ends of the linings and file off any local

high spots.

Complete relined brake shoes are available through the Exchange Replacement

Service which operates in the British Isles only.

FRAME AND FORKS

Forks

(D1)—There is no adjustment for the telescopic forks fitted to this model.  The only

maintenance required, apart from the routine check-up on the tightness of nuts and

bolts, is regular lubrication of the fork sliding members via the grease nipples

attached to each fork leg as indicated on page 19.

Application of the grease gun to these nipples charges the annular space between

the fixed outer member and the sliding inner member of each fork leg, and several

strokes of the grease gun should be given every 1,000 miles in order to ensure that the

supply of lubricant is maintained.

Protective Gaiters

These are fitted to prevent the entry of foreign matter into the moving parts and are a

PUSH-FIT

 on the fork tubes.  Periodically remove these gaiters, cleaning and greasing

the sliding members.

24

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Содержание D1 125 c.c. Bantam

Страница 1: ...00 4036 Instruction Manual Models D1 125 c c Bantam D3 150 c c Bantam Major D5 150 c c Bantam Major...

Страница 2: ...major overhauls but if any owner feels he is competent to carry out this type of work a service manual and an illustrated priced spares catalogue for this machine can be obtained from his B S A spare...

Страница 3: ...FIG 1 The Controls 3...

Страница 4: ...ARBOX HUBS IGNITION TIMING LUBRICATION CHART LUBRICATION SYSTEM ROUTINE MAINTENANCE REAR SUSPENSION RUNNING IN SPARKING PLUG STEERING HEAD TECHNICAL DATA TRANSMISSION WHEEL REMOVAL FRONT WHEEL REMOVAL...

Страница 5: ...Gear ratios top second first Clutch friction plates Chain size and pitch front 250 in rear 335 in Teeth on engine sprocket gearbox sprocket clutch sprocket rear chainwheel 7 0 11 7 22 0 3 50 117 17 1...

Страница 6: ...ght handlebar it controls the throttle opening To open the throttle i e to increase the engine speed turn the grip so that the top moves towards the rider Full movement is about a quarter of a turn Fr...

Страница 7: ...the bottom fork yoke To operate the lock turn the forks to the left then turn the key in the lock to release the plunger This prevents the machine being driven or wheeled DRIVING To Start the Engine...

Страница 8: ...pply them smoothly and progressively Try to anticipate the need to change gear or to brake so that your riding is not jerky or untidy Maintain a natural riding position as this provides maximum contro...

Страница 9: ...tion will serve as a guide to the periods between servicing and the method of carrying out the various adjustments will be found under the appropriate headings in the later chapters Weekly Check tyre...

Страница 10: ...roughly to ensure correct mixing of the two liquids If this is not done there is a risk of liquid oil undiluted with petrol reaching the carburetter and clogging the fuel supply system As the only lub...

Страница 11: ...e running of the engine Ignition timing model D5 Piston position of this model is 1 16 in before top dead centre FIG 2 Contact Breaker DECARBONISATION Decarbonising is extremely simple and should be c...

Страница 12: ...lts are unscrewed so that the tank can be raised slightly Take care when removing the barrel to support the piston as it emerges from the end of the bore in order that it may not be damaged as it fall...

Страница 13: ...t first putting a smear of oil on the gudgeon pin not forgetting a new circlip to replace the one which was removed THE PISTON MUST BE REPLACED IN ITS ORIGINAL POSITION I E WITH PISTON RING GAPS TOWAR...

Страница 14: ...less it becomes absolutely necessary Reassembly Before attempting to replace the cylinder barrel over the piston smear the latter generously with engine oil and then place it over the piston carefully...

Страница 15: ...The sparking plug Remove the sparking plug every 1 000 miles 1 500 Km or so for inspection If the carburation system is in correct adjustment the sparking plug points should remain clean almost indef...

Страница 16: ...ig 5 NEVER ATTEMPT TO MOVE THE CENTRE ELECTRODE and it is always advisable to use the special plug gap tool illustrated obtainable at 2 from any Champion Plug stockist or from the Champion Sparking Pl...

Страница 17: ...nkcase and when this occurs starting is quite impossible until it is drained away by the removal of the crankcase drain plug which is the smaller of the two plugs under the crankcase Air Cleaner This...

Страница 18: ...half filler cap measures to each gallon of petrol OIL BRAND ENGINE GEARBOX GREASE POINTS WAKEFIELD Castrol Two Stroke Oil 1 16 Or Castrol XXL Castrol XXL Castrolease Heavy SHELL 2T Petroiler Mix or 2T...

Страница 19: ...eering head Fork legs Clutch operation Speedometer drive Rear suspension units plunger Contact breaker cam pad 9 9 9 9 9 9 9 A FEW DROPS OF ENGINE OIL NO PART PAGES 10 11 12 13 14 Saddle nose bolt exc...

Страница 20: ...utch adjustment will be found at the left hand end of the gearbox mainshaft see Fig 8 and it consists of an adjusting pin C screwed into the clutch withdrawal quick thread sleeve and a locknut B to se...

Страница 21: ...rew it half a turn and holding it in this position retighten the locknut If the adjustment is correctly made in this manner it will be found that there is a small amount of free play at the clutch lev...

Страница 22: ...evel of dipstick WHEELS Hub Lubrication Inject grease through the nipples in the centres of the hubs Do not over lubricate or grease may be forced onto the brake linings and cause ineffective brakes T...

Страница 23: ...rame models and in for swinging arm frame models Make sure that the wheel is hard up against the adjusters when checking and also that the adjustment is equal on both sides of the wheel so that the la...

Страница 24: ...will stand below the lining surface this is important since the rivets will otherwise score the brake drum Insert the rivets into the holes and rivet them over on the inside of the shoe This is easily...

Страница 25: ...lb horn unscrew this item and lift off the steering head dust cover On other machines the dust cover is held in position by a central screw FIG 10 Front fork and steering head D1 Model only Slacken th...

Страница 26: ...e pinch bolts A and B FIG 11 Rear suspension unit D1 The central columns of the suspension units can then be tapped out from underneath and withdrawn through the top lugs When this is done the remaind...

Страница 27: ...function of the alternator and rectifier to maintain the battery in a charged state for all load conditions This is accomplished by a system of coil switching which adjusts the generator output accor...

Страница 28: ...ich previously went to the battery must be insulated and the stop light must be disconnected If this is not done the rectifier may be seriously damaged The machine must only be run without a battery i...

Страница 29: ...on to the exposed thread AS FAR AS IT WILL GO Finally turn the central extractor bolt with a suitable spanner until the flywheel is drawn from its taper Electric Horn The horn is adjusted at the Work...

Страница 30: ...A single bulb is used with direct lighting sets plus two screw in stop light bulbs with battery sets The transparent red plastic portion of the lamp can be removed by unscrewing the two countersunk s...

Страница 31: ...F IG 13 Wiring diagram direct lighting 31...

Страница 32: ...F IG 14 Wiring diagram battery lighting 32 www ClassicCycles org...

Страница 33: ...PARTS ACCESSORIES Click on links below OEM parts online schematics EU OEM parts online schematics US Shop Revzilla for the latest in Motorcycle Accessories Save Up to 45 on Motorcycle Tires J P Cycle...

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