TM 10-4930-351-14
0108 00
REMOVE AND CHECK OIL PUMP. (Refer to figure 17.)
INITIAL SET-UP:
Tools:
Materials/Parts Required:
Combination Wrench, 7 mm
None
(WP 0113 00, Item 3)
Key, Socket Head Screw, 4 mm
Equipment Condition:
(WP 0113 00, Item 3)
Engine removed from engine module
Rule, Machinist's, 6 in.
(WP 0113 00, Item 3)
Caliper, Vernier
(WP 0113 00, Item 3)
Gauge, Thickness
(WP 0113 00, Item 3)
1.
Remove three socket head cap screws (1).
NOTE
Use care when removing oil pump cover. The rotor's position in the oil pump cover are to be
measured.
2.
Remove the oil pump cover (2) with inner rotor (3), outer rotor (4) and O-ring (5). Discard O-ring (5). Wipe rotors (3
and 4) and oil pump cover (2) clean.
3.
Lay the oil pump cover (2) on a flat surface with the rotors (3 and 4) facing up. Measure the clearance (A) between the
outer rotor and the cover mating surface. The rotor must be 0.010-0.024 in. (0.27-0.60 mm) below the mating edge of
the oil pump cover. If measurement is out of tolerance, replace the rotor.
4.
Remove rotors (3 and 4) from oil pump cover (2) and measure for wears. If any measurement is out of tolerance, replace
the rotor(s).
a.
Measurement B (Inner Rotor Diameter): 1.167-1.172 in. (29.65-29.77 mm)
b.
Measurement C (Outer Rotor Diameter): 1.592-1.597 in. (40.45-40.58 mm)
c.
Measurement D (Outer Rotor Inside Diameter): 1.182-1.185 in. (30.03-30.1 mm)
d.
Measurement E (Rotor Thickness - Both Rotors): 0.704-0.706 in. (17.89-17.94 mm)
0108 00-22
