171
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 Loctite
#271) on the output yoke and tighten to 200 ft-lb.
Peen the lock nut to the shaft.
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 200
ft-lb. The output drive assembly is now ready for
installation.
FW-006
OIL PUMP ASSEMBLY
Disassembling and Inspecting
1. Remove the oil pump cover; then remove the gerotor
set, shaft, and pin (see Disassembling Crankcase
Half in this sub-section).
2. Inspect the crankcase for scoring, discoloration, or
cracks in the gerotor bore. If scored, crankcase
assembly must be replaced.
GZ357
3. Inspect the gerotor set for scoring, discoloration, or
cracks; then using a feeler gauge, check the inner to
outer rotor clearance. If measurements exceed speci-
fications, the gerotor set must be replaced.
GZ355
4. Inspect the oil pump cover for scoring, discoloration,
or cracks. Replace if damaged.
GZ358
5. Inspect the oil pump driveshaft and drive pin for
excessive wear or grooving. Replace as required.
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