(5) Transmission Gears Shift Hard or Clash When Clutch is Fully Disengaged. Adjust clutch control linkage and spring tension (par. [48]). Make sure the transmission mounting bolts and units are tight (pars. [57] and [58]). Drain and fill transmission with correct lubricant ([fig. 10]). If the above methods fail to cure the symptom, refer to a higher authority.
36. WHEELS AND CHAINS.
a. Transmission Countershaft and Rear Wheel Sprockets Show Excessive Wear on One Side of Teeth. Adjust the position of the rear wheel axle to aline the rear wheel sprocket with the transmission sprocket (par. [60]). If they cannot be alined, the frame is out of alinement, and the trouble must be referred to a higher authority.
b. Chains Produce Grinding Noise with Engine Idling and Vehicle on Rear Stand. If either chain is adjusted too tight, adjust to proper tension (pars. [59] and [60]). Examine both chains for presence of dirt and grit. If dirty, clean and lubricate them (par. [20 c (10)]). If either chain is dry, adjust chain oilers (par. [61]). Badly worn chains and sprockets will cause this symptom; the worn parts must be replaced (pars. [62] and [63]).
c. Front Chain Dry and/or Red (Rusty) in Appearance. The chain in this condition has not been receiving enough lubrication. Adjust chain oiler (par. [61]). If the chain is damaged from lack of oil, replace (par. [62]).
d. Rough or Jerky Vehicle Operation at Low Speed. Chains are too loose. Adjust (pars. [59] and [60]).
e. Excessive Side Play at Rim of Front Wheel. Adjust bearing cones (par. [126]). If the cones and or hub races are badly worn, replace wheel (par. [125]).
f. Front Wheel Spinning Test Produces Grinding, Grating Noise (not in brake). The wheel bearings are defective. Replace wheel (par. [125]).
g. Rear Wheel Has Excessive Side Play at Rim of Wheel. The hub bearings are defective. Replace wheel (par. [127]).
h. Rear Wheel Has Side Play in Excess of 0.010 inch on Axle. The thrust washers of hub are worn or damaged. Replace wheel (par. [127]).