TM 9-4110-255-14
Figure 5-42. Engine Oil Pump
b. Inspection.
(1) Check rotor (4) and (5) wear by measuring them and checking against the following dimensions. Replace
rotor if not between these dimensions.
A
1.167 in. and 1.172 in. (29.65 mm and 29.77 mm)
B
1.592 in. and 1.597 in. (40.45 mm and 40.576 mm)
C
0.704 in. and 0.706 in. (17.89 mm and 17.94 mm)
NOTE
The rotor must be within dimensions before checking cover wear.
(2) Check cover (2) wear by placing rotor (5) inside cover. Be sure o-ring (3) is not installed in cover and
measure the distance between rotor surface (6) and cover edge (7). The dimension should be between
0.010 in. and 0.023 in. (0.27 mm and 0.60 mm). Replace the cover if not between these dimensions.
5-95
