Related Manuals for A.J.S. 3.46 H.P.
Summary of Contents for A.J.S. 3.46 H.P.
- Page 1 A.J.S.Model 33/7. HANDBOOK OVERHEAD CAMSHAFT TROPHY MODELS 3.46 H.P. 4.95 H.P. MANUFACTURED BY PLUMSTEAD, LONDON, S.E.18. PRICE - ONE SHILLING.
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Page 3: Foreword
3.46 H.P. and 4.95 H.P. FOREWORD In giving the following information we have endeavoured to meet the needs of all A.J.S. Camshaft Model Owners—that is, both the original A.J.S. Camshaft machines and the present Trophy Models. Apart from detail modifications and improvements the machines are very similar so that this booklet will apply to both types of machines. -
Page 4: Table Of Contents
CONTENTS PAGE Foreword Driving Instruction Camshaft Engine Details Dismantling and Assembling :—Engine 4, 7, 8 and 9 Engine Lubrication 9 an d 10 Dismantling and Assembling :—Gearbox 11 and 12 Clutch and Transmission 12, 13 and 14 Front Chain Cover Carburettor 14, 15 and 16 Lucas Magdyno and Magneto... -
Page 5: Driving Instructions
DRIVING INSTRUCTIONS Assuming that the owner is already conversant with, and can ride a motor cycle, a description of the control layout will be helpful and obviate those anxious few moments when taking over a new or strange machine. First of all the Four Speed Gear Change, if hand operated, has the following positions: Low or First Gear at the bottom of the Quadrant, Neutral is next, Second, Third and Top follow on to the top of the Quadrant- With Foot... -
Page 6: Camshaft Engine Details
CAMSHAFT ENGINE DETAILS. 346 c.c. Model—Bore 70 m.m.—Stroke 90 m.m. 495 c.c. „ —Bore 79 m.m.— Stroke 101 m.m. TAPPET CLEARANCES. Inlet—16 thou. Exhaust—18 thou. When engine cold. CAMSHAFT AND MAGNETO CHAIN SIZE. … Number of Rollers—Camshaft a x .230 „... - Page 7 THE A.J.S. " TROPHY " O.H.C. ENGINE. —5—...
- Page 8 VALVE AND IGNITION TIMING. —6—...
- Page 9 The cylinder head can then be lifted up and off. There is no Spigot or washer on the Cylinder Barrel, hut the Head must he lifted high enough to clear the two Cylinder Head studs. If the Cylinder Barrel is removed do not prise this from (he Crank-case but place the palms of the hands round the finning and rock the Cylinder from side to side and when it starts to leave the crank-case lift upwards.
- Page 10 NO CYLINDER HEAD WASHER IS USED ON THE A.J.S. CAMSHAFT ENGINE. Originally the faces of the cylinder head and barrel are ground in. and providing they remain clean and unscratched can be replaced without any jointing compound or attention other than washing with petrol.
- Page 11 When Replacing the Carburettor always rent the slides and cables into position before re-fitting this to the engine, otherwise difficulty will be experienced in locating the throttle needle valve into position in the carburettor. When replacing the carburettor it will be noticed that no flange washer is used, merely make sure that both the faces are clean and smear with shellac jointing compound.
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Page 12: Engine Lubrication
ENGINE LUBRICATION All A.J.S. Camshaft Engines have dry sump lubrication. Oil is fed to Big End of the Engine and the Rocker Box by the main pump on the Timing Chain Cover. This Pump also draws oil from the Sump and returns it to the filter in the Oil Tank, an illustration of which is given below, although this is for another model. -
Page 13: Front
GEARBOX Gearbox.—To adjust the primary chain it is possible to swing the Gearbox bodily on its lower fixing bolt, and to carry this out the following instructions should be observed:— Slack off the centre nut on the foot gear change mechanism and to tighten the, front chain first slack off the nut on the adjuster bolt nearest the Engine and turn the nut on the other side of the anchorage in the same direction, i.e., anticlockwise, until the correct chain tension is obtained. - Page 14 CLUTCH AND TRANSMISSION The accompanying illustration shows a sectioned view of the Clutch fitted to Cam- shaft Models. It there is a tendency for the Clutch to slip, make sure first of all that a little play exists between the Push Rod adjuster and the Push Rod. Illustration 9.
- Page 15 If the adjuster pin bears on the Clutch Push Rod, this prevents the Clutch Springs from exerting pressure on the Plates. It is impossible to increase the Spring pressure by tightening the Clutch Spring Pins, as these are screwed right home, and any undue pressure an these will break away the heads of the pins.
- Page 16 If the chain is too slack it is apt to " whip, " which intensifies the wear and tends to break the rollers. If on the other hand it is too tight, a crushing effect is produced on the rollers, and the whole chain is strained unduly. The chain should he adjusted and kept adjusted, so that it can be pressed down in the centre with the finger about ¾...
- Page 17 When the machine is despatched from the Factory the Carburettor has been correctly set, but if the machine is used under varying atmospheric conditions, slight adjustments may be necessary. In the first case if starting is difficult and the Engine refuses to " idle " evenly, slowly screw the Pilot Air Adjuster inwards, but if on the other hand the Engine is inclined to "...
- Page 18 On the Racing Camshaft Models, an Amal Racing Carburettor with Twin Fuel feeds is fitted. When tuning this for speed work select the main jet size which gives maximum power and speed with the Air and throttle full open. The correct size is readily found by moving the air lever at full Throttle openings : any increase in power obtained by half closing the air lever indicates that the jet size is too small.
- Page 19 Unscrew Dynamo leads (M and L) Dynamo securing strap (0) and Nut from Drive cover, the Dynamo is then free. Wrap some insulating material round lead M, otherwise the battery will be discharged if the bare end touches any portion of the machine; occasionally refill the lubricator fitted to the drive cover with grease and screw the cap down.
- Page 20 Timing.—If the magneto has been removed from the machine it will be necessary to see that it is timed correctly after it is refitted. The sprocket on the armature shaft of the magneto is supplied with a vernier timing adjustment, which allows a very accurate and certain method of fixing the drive after the correct setting has been arrived at.
- Page 21 via the chain to the engine. See that the sprockets have their arrows facing as previously mentioned. Move the ignition control lever to the limit of its motion of advance. Remove the cover of contact breaker and slowly turn the armature till the fibre block of the make and brake lever arises on the inclined plane of the steel segment just sufficient to separate the points.
- Page 22 DETACHABLE REAR WHEEL To remove proceed as follows.—Put the machine on the stand and unscrew the two pins which hold the stays of the hinged portion of the rear mudguard to the frame. This hinged portion can now be swung up out of the way. Next, with the special box spanner provided, unscrew the three sleeve nuts which pass through the hub flanges.
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Page 23: Steering Head And Handlebars
STEERING HEAD AND HANDLEBARS All the 1933 A.J.S. machines are fitted with adjustable handlebars, If the rider wishes to make any adjustment, slacken off the bolts which pass through the split lugs that connect the handlebars to the forks, and partly rotate the handlebars upwards or downwards until the desired position is attained. -
Page 24: Gear Ratios
GEAR RATIOS Competition Models—Wide Ratios. Engine Sprocket. Low. Top. T h i r d . Second. Teeth 7.98 13.40 4.51 5.46 „ 5.68 13.95 4.70 8.32 „ 4.90 8.67 14.56 5.93 „ 9.07 15.22 5.13 6.20 „ 5.37 6-49 15.95 9.50 „... - Page 25 GUARANTEE. We give the following guarantee wi t h our mot or cycles, mot or cycle combinations and sidecars, which is given in place of any implied conditions, warranties, or liabilities whatsoever, statutory or otherwise, all such implied conditions, warranties, and liabilities being in alt cases excluded, any statement, description, conditions or representation contained in any catalogue, advertisement, leaflet, or other publication shall not be construed as enlarging, varying, or overriding this guarantee.