6.
Set the bearing preload by securing the bearing case
in a vise. Thread a M12 x 1.5 hex head cap screw into
the splined end of the input shaft/pinion gear and slowly
tighten the locknut until 4 to 6 in-lb (0.4 to 0.7 N−m) of
force is required to rotate the input shaft/pinion gear in
the bearing case.
0.040
in. (1.0 mm)
7.
8.
Secure the lock nut with the stake washer.
1
2
Use a depth gauge to measure the distance from the
end face of the input shaft/pinion gear to the mating sur-
face of the bearing case. Subtract the “Design Cone
Center Distance” from this distance to determine initial
shim thickness (Fig. 30).
3
DESIGN CONE CENTER DISTANCE (distance
from mating surface of axle support to end face of
pinion gear):
Figure 29
3.
1.
2.
Oil seal
Bearing case
Seal garter spring
1.870
+ 0.002 in. (47.5 + 0.05 mm)
NOTE: Bearing case shims are available in 0.004 in.
(0.1 mm) and 0.008 in. (0.2 mm) thickness.
9.
Coat new O-rings with grease and install the bearing
1
Design
Cone Center
Distance
case in the gear case. Place shims on the gear case and
temporarily install gear case assembly into axle case.
Tighten mounting nuts and screws from 35 to 41 ft-lb (47
to 56 N−m).
10.Insert
a screwdriver through the drain plug hole to
hold ring gear and measure the pinion gear to ring gear
backlash (Fig. 31).
2
PINION GEAR TO RING GEAR BACKLASH:
0.004
to 0.016 in. (0.10 to 0.40 mm)
Figure 30
11.
shim thickness.
Adjust backlash by increasing or reducing gear case
1.
Input shaft/pinion gear
2.
Bearing case
12.Check
pinion gear to ring gear engagement (see Pin-
ion Gear to Ring Gear Engagement in this section of this
manual).
1
13.Place
the correct combination of shims on the gear
case. Tighten mounting nuts and screws from 35 to 41
ft-lb (47 to 56 N−m).
3
2
14.Install
retaining rings and driven gear on input shaft/
pinion gear.
15.If
the drive gear (on drive motor shaft) was removed,
4
install the retaining rings and drive gear on the motor
shaft.
16.Use
new O-ring and install the drive motor.
a new gasket and install the cover plate. Use a
Figure 31
3.
4.
1.
2.
Axle case
Screwdriver
Dial indicator
Input shaft/pinion gear
Groundsmaster 4100−D
Page 6 − 23
Axles, Planetaries, and Brakes
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