10. Using a pair of external snap ring pliers, remove the snap rings
from both ends of the shifter fork shaft, and slide all three forks from
the shaft. Then take the first and third fork and insert it into the sliding
gear on the layshaft. Be careful not to install it upside down. Using a
blade type feeler gauge, measure the clearance between the thrust pads
on the fork and the inside of the groove in the gear (Fig. 42). Check both
pads on the fork and both sides of each pad. If you can insert a feeler,gauge
larger than .020" in any of these places, replace the shift fork. Repeat
this procedure with each fork by inserting it into its respective gear
or dog, and checking the clearance.
11. There is a peg on the rear of each shift fork that fits into one
of three machined grooves in the shifting drum. You must now measure the
diameter of each peg and measure the critical part of its corresponding
groove in the shift drum. This will tell you how much side movement the
shift forks will have when they are engaged in each particular gear. If
this side play is excessive, it could be the cause of a transmission jumping
out of gear, or missed shifts. First measure the diameter of the peg on
the first-third shift fork (Fig. 43.). Write
FIG. 42
FIG. 43
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