TM 9-2320-289-34
6-5.
FRONT AND REAR AXLE DIFFERENTIAL REPLACEMENT (M1009) (Con’t).
7 .
Remove bearing preload gage (13), spacer if installed, shim (5), and feeler gage (11).
8 .
Measure thickness of bearing preload gage (13) in 3 places and average these readings.
Record the result.
9 .
Measure combined thickness of spacer if present, shim (5), and feeler gage (11).
10.
Using example given in Table 6-1, determine proper thickness of each shim pack,
Table 6-1. Determining Side Bearing Shim Requirements
OPPOSITE SIDE
inches
millimeters
inches
millimeters
0.250 In.
6.350 mm
Thickness of bearing
Combined
total
of
0.265 In.
6.731 mm
preload tool required
spacer, service shim,
to force ring gear Into
and feeler gage.
contact with drive pln-
Ion.
TO MAINTAIN PROPER BACKLASH (0 .005 In. -
-0.010 In.
-0.254 mm
0.008 in. ) (0.127 mm - 0.2032 mm), ring gear is
moved away from pinion by subtracting 0.010 in.
+ 0.010 in.
0.240 in.
+ 0.254 mm
6.096 mm
(O .254 mm) shims from ring gear side and adding
0.275 in.
6.985 mm
0.010 in. (0.254 mm) shims to the opposite side.
1
+0.004 in.
TO OBTAIN PROPER PRELOAD on side bearings,
+ 0.102 mm
add 0.004 in. (0. 102 mm) to each side.
+ 0.004 in.
+0.102 mm
0.244 in.
6.198 mm
Shim dimension re-
Shim dimension re-
0.279 in.
7.087 mm
quired for ring gear
quired for opposite
side,
side.
RING GEAR SIDE
11.
If present, install 2 spacers as tagged, between bearing cups (6) and housing.
NOTE
l Production preloading of the differential side bearings (10) is
accomplished by use of cast iron preload shims. These cannot be
reused when rebuilding the housing as they may break when tapped
into place. Service shims may be reused if not damaged.
• Chamfered side of shim (5) should face outward. Shim should have
sufficient chamfer or lead around outside diameter to allow for easy
installation. Additional chamfer on shim should be filed or ground as
required.
6-19
