LUBRICATION
Page 4C-6 90-857046R1 NOVEMBER 2001
Cleaning and Inspection
Oil Pump
1. Check oil pump components for pitting, scratches, and for the following measurements.
Replace oil pump if worn or out of specification.
2. Using a feeler gauge, measure the following oil pump clearances:
a. Between outer rotor and pump housing (a).
b. Between the inner rotor and outer rotor (b).
c. Between the outer rotor and pump housing (c).
55803
a
b
c
Oil Pump Clearances
S/N OT426439 and Up (Manual)
S/N OT427436 and Up (Electric)
a 0.0045 - 0.009 in. (0.11 - 0.23 mm)
b 0.005 in. (0.12 mm)
c 0.0015 - 0.003 in. (0.04 - 0.08 mm)
Oil Pump Clearances
S/N OT426438 and Below (Manual)
S/N OT427435 and Below (Electric)
a 0.0035 - 0.006 in. (0.09 - 0.15 mm)
b 0.005 in. (0.12 mm)
c 0.001 - 0.003 in. (0.03 - 0.08 mm)
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