RA PD 310236
Figure 39—Brake Sleeve Nut
c. At position of least slack, a correctly adjusted rear chain has ½–inch, or slightly more, free up‐and‐down movement midway between sprockets. Chain must never be run taut (no slack at tightest point). Chain must never be allowed to run loose enough to cause jerky operation and/or strike the chain guard or other chassis parts.
d. At the time rear chain adjustment is made, inspect chain for correct lubrication and if necessary, adjust rear chain oiler (par. [61]).
e. Rear chain adjustment and rear wheel alinement are both made by means of the rear wheel adjusting screws. Therefore, adjustment of either the chain or the wheel alinement can affect adjustment of the other, making it necessary to consider both adjustments at the same time.
(1) Remove rear axle nut and lock washer (right side of vehicle).
(2) Loosen brake sleeve nut enough to allow brake assembly to slide backward or forward in frame mounting ([fig. 39]).
(3) Loosen the two (right and left side) rear wheel adjusting screw lock nuts.
(4) Turn wheel adjusting screws clockwise (to right) to move wheel and sprocket backward. This tightens chain. NOTE: If chain is too tight, turn wheel adjusting screws counterclockwise (to left) so that wheel can be shifted forward. This will loosen chain. Always turn the two wheel adjusting screws an equal number of turns in order to keep wheel alined.