TM 9-4310-397-14
6-8. ENGINE OIL PUMP INSPECTION, REPAIR AND REPLACEMENT.
(4)
Remove outlet tube (6).
(5)
Remove preformed packing (7) from outlet tube bore in block. Discard preformed packing.
(6)
Remove housing and gear assembly (8) from front plate.
(7)
Remove outlet tube (6) from cover.
(8)
Remove o-ring (9) with preformed packing hook. Discard preformed packing.
(9)
Remove cap screw (10) and lock washer (11) and pick up tube (12). Discard lock washer.
(10)
Remove preformed packing (13) from pick-up tube. Discard preformed packing.
(11)
Clean all oil pump parts in solvent (item 11, section II, appendix E). Use compressed air to dry parts.
b. Inspection.
(1)
Inspect pick-up tube. Check flange-to-tube weld for cracks. If cracks or other defects are found, replace
pick-up tube.
(2)
Measure clearances for the following:
(a). Axial clearance between gear and pump cover.
1 Place a straight edge (Figure 6-35, 1) across the face of the pump.
2 Thickness of the gears is 1.62-1.622 in. (41.15-41.20 mm).
3 Axial clearance should be 0.002-0.007 in. (0.05-0.17 mm).
4 The maximum permissible axial clearance should be 0.0085 in. (0.22 mm).
5 Replace pump if clearances exceed tolerances.
Figure 6-35. Oil Pump Axial Clearance
6-36