600 SRM 496
Oil Pump Repair
INSPECT
1.
Check front cover (pump housing) and pump
cover for wear or damage. Check plunger spring
for damage.
2.
Measure parts of oil pump. See Figure 40.
a. Measure clearance between gears and cres-
cent. Correct clearance is 0.20 to 0.32 mm
(0.008 to 0.013 in.). If clearance is more than
0.35 mm (0.014 in.), repair as necessary.
b. Measure clearance between crescent and
teeth of inner gear.
Correct clearance is
0.267 to 0.380 mm (0.0105 to 0.0150 in.). If
clearance is more than 0.40 mm (0.0157 in.),
repair as necessary.
c.
Use straight edge to measure side clearance
of gears. Correct clearance is 0.03 to 0.63 mm
(0.0012 to 0.0248 in.). If clearance is more
than 0.10 mm (0.004 in.), repair as necessary.
d. Measure clearance between body and outer
gear. Correct clearance is 0.090 to 0.184 mm
(0.0035 to 0.0072 in.). If clearance is more
than 0.20 mm (0.008 in.), repair as necessary.
ASSEMBLE
1.
Install oil seal in oil pump housing. Make sure
front edge of oil seal is even with outer edge of
housing. See Figure 39.
2.
Lubricate gears with engine oil.
Then install
gears in housing.
3.
Install pump cover. Apply thread-locking com-
pound on screws for pump cover. Then install
screws.
4.
Install plunger assembly and snap ring.
1.
CLEARANCE BETWEEN CRESCENT AND
INNER GEAR
2.
CLEARANCE BETWEEN CRESCENT AND
GEARS
3.
SIDE CLEARANCE OF GEARS IN HOUSING
4.
CLEARANCE BETWEEN HOUSING AND OUTER
GEAR
Figure 40. Oil Pump Measurement
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