3-42
GZ396
3. While rocking the drive bevel gear back and forth,
note the maximum backlash reading on the gauge.
GZ398
4. Acceptable backlash range is 0.127-0.381 mm
(0.005-0.015 in.).
Correcting Backlash
NOTE: If backlash measurement is within the
acceptable range, no correction is necessary.
1. If backlash measurement is less than specified,
remove an existing shim, measure it, and install a
new thinner shim.
GZ393A
2. If backlash measurement is more than specified,
remove an existing shim, measure it, and install a
thicker shim.
NOTE: Continue to remove, measure, and install
until backlash measurement is within tolerance.
Note the following chart.
3. Once correct gear pattern and backlash are estab-
lished, install a new lock nut (coated with red Loc-
tite #271) on the output drive shaft and tighten to
59 ft-lb.
MT007A
4. Using an appropriate holding fixture and wrench
adapter, install the secondary drive gear nut
(threads coated with red Loctite #271) and tighten
to 74 ft-lb. The output drive assembly is now
ready for installation.
GZ393B
OIL PUMP ASSEMBLY
Disassembling and Inspecting
1. Remove the oil pump cover; then remove the gero-
tor set, shaft, and pin (see Disassembling Crank-
case Half in this section).
2. Inspect the crankcase for securing, discoloration,
or cracks in the gerotor bore. If scored, crankcase
assembly must be replaced.
Backlash Measurement
Shim Correction
Under 0.127 mm (0.005 in.)
Decrease Shim Thickness
At 0.127-0.381 mm (0.005-0.015 in.)
No Correction Required
Over 0.381 mm (0.015 in.)
Increase Shim Thickness
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