Cub Cadet 7000 Series - Manual (Page 95)

7264 Four Wheel Drive Axle Assembly Removal and Disassembly
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8.10. Install the differential bearing centering tool.
Secure it using two of the bolts that normally
hold the left and right axle housings together.
See Figure 8.10.
8.11. Measure and record the distance between the
the top edge of the outboard differential bearing
and the mating surface of the axle housing.
See Figure 8.11.
NOTE: The front axle is to be assembled with
zero available end play, as measured at the
outer race of the outboard differential bearings.
To accomplish this, we will measure the height of
the bearing above the mating surface, and com-
pare this height to the depth of the bore in the
left housing. If the depth of the bore is greater,
shims must be added to make the height of the
bearing equal to the depth of the bore that it
Figure 8.10
Differential Bearing
Centering Tool Outboard Differential
Bearing on Left
Axle Shaft
Dowel Pins
Figure 8.11
Machined Bar Stock
Top of
Bearing
Mating Surface
Measurement
seats in. If the depth of the bore is less, shims
must be removed.
NOTE: The total number of shims will be deter-
mined by this depth and height measurement.
The location of those shims in the left or right
axle housing will be determined by the ring gear
back-lash measurement and the gear tooth con-
tact pattern.
8.12. Hold the end of the either axle stationary, and
rotate the drive pinion.
NOTE: This will cause the drive pinion to rotate
the ring gear, transferring prussian blue between
them. The transferred prussian blue will register
the contact pattern on the two gears.
8.13. Set-up a dial-indicator to measure the back-lash
on the ring gear. See Figure 8.13.
NOTE: The back-lash is most easily measured
against the edge of one of the ring-gear bolt
heads.
8.14. Rotate the ring gear back and forth as far as
possible without moving the drive pinion, and
note the reading on the dial indicator. This is the
ring gear back-lash measurement.
NOTE: The ring gear back-lash measurement is
between .004” and .006” (0.1mm and 0.15mm)
from the factory.
NOTE: If ring gear back-lash is beyond .012”
(0.3mm) it should be adjusted.
NOTE: .004” (0.1mm) service shims are avail-
able for the purpose of making adjustment.
Figure 8.13
Measurement
Back-lash
6