Adjusting Drive Chains
Inspect the adjustment of chains at least every week and adjust them if necessary. Adjustment of front chain can be checked through inspection hole provided in chain guard. Chains must not be allowed to run loose enough to strike guards or other chassis parts, because when that loose, they cause motorcycle to jerk when running at low speed, and there is excessive wear of chains and sprockets. The rear chain requires more frequent adjustment than front chain. As chains stretch and wear in...
Servicing Saddle Spring Post
To Identify Items and Part Numbers, Refer to Illus. 20 Spring combinations with part numbers that make up saddle spring post assemblies, Part Nos., 3122-36, 3123-36, 3121-36, 3123-36A, 3125-36, are listed. New motorcycles are furnished with standard saddle spring post assembly unless other than standard is specified on order. The illustration shows following parts of saddle spring post assembly 1. Spring tension adjusting nut. After raising saddle, remove saddle post clamp nut 5 , which is...
Engine Lubrication
Engine lubrication is a circulating system. A gear-type feed pump OJH.V. Engine or a vane-type feed pump Side Valve Engine , draws oil from the tank and delivers it to crankshaft under pressure. Pressure can be regulated. A gear-type scavenger pump returns oil from engine base to tank. OJi.V. Engine Refer to schematic diagram of oil pump, Illus. 23, and engine oiling system, Illus. 22. Side Valve Engine, 1940 and Earlier Models Refer to schematic diagram of oil feed pump, Illus. 25, and engine...
Illus 15 Push Rod Cover Disassembled
ADJUSTING VALVE TAPPETS SIDE VALVE ENGINE 1. Tappet adjusting screw with which adjustment is made, after slightly loosening nut 2 . 2. Tappet adjusting screw lock nut. ADJUSTING VALVE TAPPETS SIDE VALVE ENGINE 1. Tappet adjusting screw with which adjustment is made, after slightly loosening nut 2 . 2. Tappet adjusting screw lock nut. The intake valves are those nearest the carburetor. Adjust tappets so that there is .004 to .005 clearance between intake valve steins and tappets, and 007 to .008...
Removing And Installing Oil Pump With Engine Installed In Chassis
To Identify Items, Refer to Illus. 56 1. Remove stop lamp switch and oil pressure switch. Remove oil return pipe. Remove oil feed pipe and install nipple cap. Part No. 358315 on oil tank feed pipe nipple to prevent oil from running out, or drain tank. 2. 1940 Model pump is secured to crankcase by six nuts after removing the six nuts, remove pump cover and gasket 1941 and later Model pump is secured by one cap screw, one flat head screw and five nuts, one of the nuts is extra long to provide...
Oil Bath Type Cleaner
A few motorcycles are in service equipped with an oil bath type air cleaner. Clean and refill air cleanerapil gt cup at .leasUeach time engine oil tank frequently under dusty,conditions. ' Remove oil cup and gt baffle, thoroughly clean them and refill to indicated level with same grade of new oil as used in engine. Do not fill oil cup above indicated oil level as a higher level will restrict passage of air through cleaner and upset carburetion to the extent that engine may not start at all, or...
High Speed Tips
Develop the habit of frequently snapping throttle shut for an instant when running at high speed. This draws additional lubrication to pistons and cylinders and helps cooling. In cold weather run engine slowly until it is thoroughly warmed up, to avoid possible damage to piston rings, pistons and other parts before oil is warm enough to circulate freely. A motorcycle run long distances at high speed must be given closer than ordinary attention to avoid overheating and possible consequent...
General Lubrication
Note If predominating service conditions are either wet or muddy, or very dusty, the 750 and 1500 mile greasing intervals should be reduced to 500 and 15 Every 5000 miles, or at least once a year, pack generator commutator end bearing with high melting point grease Harley-Davidson grade A grease . See Lubricating Commutator End Armature Bearing, Page 105. 16 Lubricate front wheel brake handlever and control cable every 750 miles or whenever operation of brake indicates lubrication is necessary....
Adjusting Carburetor
To Identity Items, Refer to Illus. 108 Before attempting to correct faulty engine performance, attention should be given other items which have a direct bearing on, and can affect carburetor adjustment as well as engine performance. A. See that throttle and spark controls are correctly adjusted. B. Remove drain screw from bowl of carburetor. Drain and flush bowl to eliminate dirt and water. C. Drain and flush gasoline strainer. D. Check air cleaner to be sure passage of air through cleaner is...
Illus 3
CHAIN OILER ADJUSTING SCREW AND OIL PASSAGE SIDE VALVE ENGINE 1. Chain oil passage in gear case cover. 2. Chain oiler adjusting washers. 3. Chain oiler adjusting screw. raises the least doubt as to its getting ample lubrication, add one or two more .002 washers under head of chain oiler adjusting screw. A well lubricated chain not only has an oily surface, but is also clean and free of discoloration. If chain has a brownish hue, and rusty appearance at side and center plates, it is...