Differential Gear Installation
If the ring gear was removed from the differential
3
1.
2
case, use medium strength Loctite thread locker and
tighten the mounting screws from 22 to 25 ft-lb (30 to
34
N--m).
1
2.
1901
Apply molybdenum disulfide lubricant (Three Bond
or equivalent) to the splines and bearing surfaces
of the differential pinion gears, pinion washers and side
gears.
3.
original location in the differential case.
Install the side gear shims and side gears in their
Figure 39
1.
2.
Vise
Differential gear case
3. Dial indicator
4.
ers in their original location in the differential case. Tem-
porarily install the differential pinion shaft.
Place the differential pinion gears and pinion wash-
More than 35% total tooth contact
5.
Securethedifferentialcaseinasoftjawedvise.Posi-
tion a dial indicator on a tooth of the differential pinion
gear.Pressthepinionandsidegearagainstthedifferen-
tial case and measure the pinion gear to side gear back-
lash (Fig. 39).
PINION GEAR TO SIDE GEAR BACKLASH:
1/3
from small end of tooth
to 1/2 of entire width
0.004
to 0.016 in. (0.10 to 0.40 mm)
6.
shim thickness.
Adjust backlash by increasing or reducing side gear
Figure 40
12.Install
support half.
differential gear assembly in right side axle
NOTE: Side gear shims are available in 0.043 in. (1.10
mm), 0.047 in. (1.20 mm) and 0.051 in. (1.30 mm) thick-
ness.
13.Coat
a new O-ring with grease and install left side
axlesupporthalf.Tightenaxlesupportcasescrewsfrom
7.
Steel Blue lightly over several gear teeth.
Apply gear marking compound, such as DyKemR
35
to 41 ft-lb (47 to 56 N--m).
14.Install
Shaft/Pinion Gear in this section of this manual).
input shaft/pinion gear assembly (see Input
8.
either pinion gear until the side gears have made one
complete revolution.
While applying a light load to either side gear, rotate
15.Coat
new O-rings with grease, align differential shaft
splines with differential gear assembly and slide differ-
ential shaft assemblies onto axle support.
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. 40).
16.Install
bevel gear case/axle case assemblies (see
Bevel Gear Case/Axle Case Assembly in this section of
this manual).
10.Adjust
side gear shims if necessary to correct tooth
contact. Recheck differential pinion gear to side gear
backlash if any changes are made.
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 -- 28
Groundsmaster 4000--D
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