333
GEARCASE
DRIVESHAFT SHIMMING
12
with end of threads. Tighten locking ring on pre-
load screw.
Rotate the driveshaft several revolutions to seat
bearings.
Lay the tool base on its side. Position the shim
gauge bar against guide pins of the tool base.
Check the squareness of the bearing housing
mounting surface by holding the shim gauge bar
against the pinion while rotating just the bearing
housing and measuring the clearance between
the gauge bar and the bearing housing with feeler
gauges. Measure between each pair of screw
holes. Replace the bearing housing and repeat
check if variance exceeds 0.004 in. (0.010 mm).
Check the squareness of the pinion to the drive-
shaft by holding the shim gauge bar against the
bearing housing (between the screw holes) while
rotating just the driveshaft and pinion assem-
bly and measuring the clearance between the
shim gauge bar and the pinion. Replace the pinion
or the driveshaft, as necessary, and repeat the
check if variance exceeds 0.002 in. (0.050 mm).
Subtract the average clearance measurement
obtained from 0.020 in. (0.508 mm) to determine
the correct shim thickness required. Select the
fewest number of shims to achieve the correct
thickness.
Remove the driveshaft from the tool base.
Remove the collar and bearing housing from the
driveshaft, and add the required amount of shims.
IMPORTANT: Use extreme care when removing
bearing housing to avoid damaging the seals. Use
Driveshaft Seal Protector, P/N 318674.
Check shimming by reassembling the driveshaft
with shims and placing it back into the tool base.
The measurement between the gauge bar and the
pinion should be 0.020 in. (0.508 mm).
“S2” TYPE GEARCASE
Remove the shimming screw and pinion from the
driveshaft.
IMPORTANT: Make sure shimming screw is not
installed in assembled gearcase.
“O,” “L,” AND “M” TYPE GEARCASES
Remove the nut and pinion from the driveshaft.
Discard the nut.
1. “S2” Type Gearcase - pinion shimming bolt
2. “O”, “L”, “M”, Type Gearcases - pinion nut
3. Collar
4. Tool base
5. Groove
COA3566
DSC00326
005415
1. Shim gauge bar 005416
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