(5) Check correct alinement of wheel by noting that tire (not tire rim) runs approximately midway between lower rear frame tubes at the point where tubes join transmission mounting. It is desirable to have tire run slightly closer (not more than 1⁄16 in.) to right than to left side lower tube. A further check of alinement is observing that rear sprocket runs centrally in chain. CAUTION: If rear wheel is not correctly alined, vehicle steering will be affected, and sprockets will wear excessively on one side.
(6) With adjustment of chain and wheel alinement completed, securely tighten wheel adjusting screw lock nuts, and brake sleeve nut: replace axle lock washer and nut, tightening nut.
(7) Recheck adjustment of chain as tightening brake sleeve nut and axle nut sometimes changes the chain adjustment.
(8) After tightening rear chain, rear brake may be found too tight. Check and correct brake adjustment (par. [96]).
61. CHAIN OILERS ([fig. 40]).
a. Both front and rear chains are automatically lubricated by engine oil pumps. Chain oilers are adjustable and may need occasional readjustment to meet lubrication requirements of varied operating conditions. Chains under most operating conditions require a very small amount of oil; therefore, chain oilers require very fine adjustment to supply just enough oil without waste.
b. When adjusting chain oilers, it is advisable to add or remove only one thin washer at a time and inspect chain again after vehicle has run approximately 100 miles, to determine whether or not further adjustment is necessary.
c. If inspection of front chain through inspection hole reveals that chain is not getting enough oil, adjust front chain oiler as follows:
(1) Add thin (0.002–inch thick) washer under head of front chain oiler adjusting screw ([fig. 40]). Do not remove any washers already under head of screw.