Installation
3
1.
thread locking compound and tighten the mounting
screws from 22 to 25 ft-lb (30 to 34 N−m).
If the ring gear was removed, use medium strength
2
1
2.
Apply molybdenum disulfide grease to the splines
and bearing surfaces of the differential pinion gears, pin-
ion washers, and side gears.
3.
Install the side gear shims and side gears in their
original location in the differential case.
4.
Place the differential pinion gears and pinion wash-
ers in their original location in the differential case. Tem-
porarily install the differential pinion shaft.
Figure 37
1.
2.
Vise
Differential gear case
3.
Dial indicator
5.
Secure the differential case in a vise. Position a dial
indicator at the tooths center and measure the differen-
tial pinion gear to side gear backlash (Fig. 37).
More than 35% total tooth contact
PINION GEAR TO SIDE GEAR BACKLASH:
0.004
to 0.016 in. (0.10 to 0.40 mm)
6.
Adjust backlash by increasing or reducing side gear
shim thickness.
NOTE: Side gear shims are available in 0.043 in. (1.1
mm), 0.047 in. (1.2 mm), and 0.051 in. (1.3 mm) thick-
ness.
1/3
from small end of tooth
to 1/2 of entire width
R
Figure 38
7.
Apply gear marking compound, such as DyKem
Steel Blue lightly over several gear teeth.
12.Install differential gear assembly in right side axle
support half.
8.
While applying a light load to either side gear, rotate
either pinion gear until the side gears have made one
complete revolution.
13.Coat a new O-ring with grease and install left side
axle support half. Tighten axle support case screws from
35
to 41 ft-lb (47 to 56 N−m).
9.
Ideal tooth contact should cover more than 35% of
each tooth surface. The contact area should be in the
center of each tooth and extend 1/3 to 1/2 way across
each tooth from the toe (small) end (Fig. 38).
14.Install input shaft/pinion gear assembly (see Input
shaft/Pinion in this section of this manual).
15.Coat
splines with differential gear assembly, and slide differ-
ential shaft assemblies onto axle support.
new O-rings with grease, align differential shaft
10.Adjust
contact. Recheck differential pinion gear to side gear
backlash if any changes are made.
side gear shims if necessary to correct tooth
16.Install
Bevel Gear Case/Axle Case Assembly in this section of
this manual).
bevel gear case/axle case assemblies (see
11.
After backlash and tooth contact have been ad-
justed, align the hole in the differential pinion shaft with
the hole in the differential case and install a new spring
pin.
Axles, Planetaries, and Brakes
Page 6 − 26 Rev. C
Groundsmaster 4100−D
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