328
GEARCASE – COUNTER ROTATION
DRIVESHAFT SHIMMING
Check squareness of the bearing housing mount-
ing surface by holding the shim gauge bar against
the pinion while ro tating just the b earing h ous-
ing. Use a feeler gauge to measu re clearance
between the gauge bar and the bea ring h ousing
between each pair of scre w holes. Replace the
bearing housing and re peat check if va riance is
greater than 0.004 in. (0.101 mm).
Check squareness of the pinion to the driveshaft.
Hold the shim g auge bar ag ainst the bearing
housing (between the scre w holes) while rotating
just the driveshaft and pinion assembly. Mea-
sure clea rance between the gauge bar and the
pinion at se veral locatio ns. If varia nce is gre ater
than 0.002 in . (0.050 mm) replace the pinion or
driveshaft, as necessary, and repeat check.
Subtract the averag e clearan ce measurement
from 0.020 in. (0.508 mm) to determine the cor-
rect shim thickness req uired. Sele ct t he fe west
number of shims to achieve the correct thickness.
Remove the driveshaft from the tool and add the
required shims be tween the b earing housing a nd
the thrust washer.
IMPORTANT: Use extreme care when removing
bearing housing to avoid damaging the seals. Use
Driveshaft Seal Protector, P/N 318674.
Check cleara nce a gain. The measureme nt
between the gaug e bar and pinion should be
0.020 in. (0.508 mm).
Remove th e nut and pinion from the driveshaf t.
Discard the nut.
005417
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