(2) To check results, refer to step [b] above.
f. Evidence of too much oil on rear chain (supplied by oiler) requires cutting down on chain oiler.
(1) To adjust oiler, remove thin (0.002–inch thick) washer from under head of rear chain oiler adjusting screw ([fig. 40]).
(2) To check results, refer to step [b] above.
g. At 1000–mile intervals, loosen both front and rear chain oiler adjusting screws ([fig. 40]) two turns each. Do not remove screws. Start and idle engine 1 minute, then tighten screws firmly, but do not force. This operation serves to flush oiler control valves and rear chain oiler pipe.
62. REPLACEMENT OF FRONT CHAIN.
a. A new or original duplex front chain is endless, not provided with connecting link, and engine sprocket must be removed in order to remove or replace chain.
b. Remove.
(1) Remove outer front chain guard (par. [102]).
(2) Remove engine sprocket (par. [65]). Chain can now be lifted off clutch sprocket.