5.
Determine necessary quantity of support shims.
4
57 to 67 ft−lb
(77 to 91 N−m)
A. Lubricate the axle case support bushing with a
thin coat of grease and slide axle case support onto
knuckle pin.
1
B. Position support shims that were removed during
disassembly between axle case support and axle
case. Install mounting screws into axle case. Slowly
tighten screws while frequently checking for clear-
ance (vertical endplay) between axle case support
and knuckle pin. If binding of components is noted
before screws are fully tightened, add additional sup-
port shims. Torque screws from 57 to 67 ft−lb (77 to
VERTICAL
ENDPLAY
6
5
2
3
91
N−m).
Figure 70
4.
5.
6.
C. Use dial indicator to measure vertical endplay of
axle case (Fig. 70).
1.
2.
3.
Axle case support
Axle case
Bevel gearcase
Dial indicator
Knuckle pin
Support shim location
AXLE CASE ASSEMBLY ENDPLAY:
0.001
to 0.008 in. (0.02 to 0.20 mm)
3
2
D. Adjust endplay by increasing or reducing number
of axle case support shims.
1
NOTE: Axle case support shims are available in
4
0.004
in. (0.10 mm), 0.008 in. (0.20 mm) and 0.016
in. (0.40 mm) thickness.
6.
After correct support shims have been determined,
remove mounting screws and apply heavy strength
thread−locking compound to screw threads. Reinstall
screws and torque from 57 to 67 ft−lb (77 to 91 N−m).
5
IMPORTANT: Correct engagement between bevel
gears is critical to axle performance and durability.
7.
Temporarily install the bevel gear case/axle case as-
Figure 71
sembly on the axle support. Position a dial indicator at
the tooths center. Prevent the axle from turning and
measure the upper bevel gear to differential shaft gear
backlash (Fig. 71).
1.
2.
3.
Axle support
Upper bevel gear
Differential shaft gear
4.
5.
Dial indicator
Axle bearing shims
UPPER BEVEL GEAR BACKLASH:
4
5
0.004
to 0.016 in. (0.10 to 0.40 mm)
1
8.
Adjust backlash by increasing or reducing axle bear-
ing shim thickness (see Differential Shafts in this section
of this manual).
NOTE: Axle bearing shims are available in 0.004 in.
(0.10
mm), 0.008 in. (0.20 mm) and 0.020 in. (0.50 mm)
thickness.
3
2
Figure 72
1.
2.
3.
Axle cover assembly
Lower bevel gear
Axle gear
4.
5.
Dial indicator
Axle bearing shims
Groundsmaster 3280−D/3320
Page 8 − 39
Drive Axles
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