BIGFOOT GEAR HOUSING
Page 6B-46 90-857046R1 NOVEMBER 2001
Pinion Gear Depth and Forward Gear Backlash
DETERMINING PINION GEAR DEPTH
NOTE: Read entire procedure before attempting any change in shim thickness.
IMPORTANT: Forward gear assembly pilots the end of the pinion gauge and must be
installed in gear housing when checking pinion gear depth. Without it an inaccurate
measurement will be obtained.
1. Clean the gear housing bearing carrier shoulder and diameter.
2. With gear housing positioned up right (drive shaft vertical), install Bearing Preload Tool
(91-14311A2) over drive shaft in sequence shown.
a
b
c
d
e
f
g
h
h
a- Adaptor: Bearing surfaces clean and free of nicks
b- Thrust Bearing: Oiled and able to move freely
c- Thrust Washer: Clean and free of nicks and bends
d- Spring
e- Nut: Threaded all-the-way onto bolt
f- Bolt: Held snug against spring
g- Sleeve: Holes in sleeve must align with set screws
h- Set Screw (2): Tightened against drive shaft, bolt should not slide on drive shaft.
3. Measure distance between top of nut and bottom of bolt head.
4. Increase distance by 1 in. (25.4 mm).
5. Rotate drive shaft 5 to 10 revolutions. This should properly seat drive shaft tapered roller
bearing.
19884
a
b
c
a- 1 in. (25.4 mm)
b- Nut
c- Bolt Head
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