Cub Cadet 7000 Series - Manual (Page 97)

7264 Four Wheel Drive Axle Assembly Removal and Disassembly
6 - 123
8.24. Examine the contact pattern that is visible in the
prussian blue on the drive pinion.
See Figure 8.24.
NOTE: Adding shims between the tapered roller
bearing and the thrust washer on the drive pin-
ion will reduce back-lash. It will also move the
contact patch on the drive pinion deeper into the
root of the teeth and back away from the nose of
the drive pinion gear. The contact patch on the
ring gear will move closer to the root of the ring
gear teeth, and farther in across the face of the
teeth.
NOTE: Adding shims between the right axle
housing and the bearing that seats in it will
increase back-lash and move the ring gear con-
tact patch farther out from the root of the teeth,
but will not result in a movement of the contact
patch across the face of the teeth. Likewise, the
contact patch will be shallower on the drive pin-
ion teeth, but will not move across the face of the
teeth.
NOTE: Once zero end play is established, if
shims are added between the bearing and the
right axle housing, and equal thickness of shims
must be removed from between the opposite-
side bearing and the left axle housing.
Figure 8.24
Drive Pinion Pattern
Contact Patch
8.25. Remove the pinion stake nut and spacer from
the drive pinion using the same technique that
was used during initial disassembly.
8.26. Remove the drive pinion and outer tapered roller
bearing.
8.27. Make any necessary shim adjustments to the
drive pinion and differential bearings.
8.28. Repeat backlash measurement and tooth pat-
tern check to confirm correct adjustment. Re-
adjust and re-check as necessary.
8.29. Lubricate a new O-ring, and install it on the drive
pinion.
8.30. Install the drive pinion and outer bearing in the
axle housing.
8.31. Install a new pinion seal.
NOTE: Drive the seal .080” (2mm) past the sur-
face of the pinion housing of the right axle hous-
ing.
NOTE: The Heavy seal lip should face in, the
lighter dust lip of the seal should face out.
8.32. Install the pinion collar. See Figure 8.32.
8.33. Install a new pinion nut finger tight.
8.34. Check pinion drag to determine drive pinion pre-
load using the following steps:
8.35. Clove-hitch a 3’ (1 meter) length of twine around
the drive pinion splines and wrap the splines
until 6”- 8” (12-16cm) remains.
Drive Seal Down
Install Collar
Figure 8.32
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