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TM 10-4320-311-14
6-7. Replace/Inspect/Repair Lube Oil Pump.
This task covers:
a.
Removal
b.
Inspection
c.
Repair
d.
Installation
INITIAL SETUP
Tools
Materials/Parts
Tool Kit, General Mechanics (Item 1,
Diesel fuel (Item 2, Appendix E,
Appendix B, Section III)
Section II)
Micrometer Set (Item 3, Appendix B,
Equipment
Section III)
Condition
Para
6-6
Crankcase cover removed
REMOVAL: Refer to Figure 6-8.
a.
Remove three lube oil pump cover bolts (1) holding lube oil pump cover (2).
b.
Remove lube oil pump cover (2) and O-ring (3) Discard O-ring.
c.
Lay crankcase cover on clean, flat surface.
d.
Grasp hold of the plastic gear (4) and carefully pull spindle (5) from lube oil pump shaft.
e.
Remove drive pin (6).
f.
Remove lube oil pump shaft (7) and outer rotor (8) from crankcase cover.
INSPECTION:
a.
Clean lube oil pump parts with diesel fuel.
b.
Check that the outside diameter of the outer rotor Is at least 1.138 inches (28.90 mm).
c.
Check that the crankcase cover housing inside diameter is less than 1.149 inches (29.18 mm).
d.
Check that the clearance between housing ID and outer rotor OD is between 0.005-0.063 inch (0.120-0.160 mm)
e.
Check that outer rotor and inner rotor width is at least 0.311 inch (7.90 mm).
f.
Check that the crankcase cover housing depth is less than 0.319 inch (8.10 mm).
g.
Check that the clearance between the inner and outer rotor is less than 0.010 inch (0.25 mm)
REPAIR:
a.
Replace lube oil pump if the OD of the outer rotor Is less than 1.138 inches (28.9 mm).
b.
Replace crankcase cover if the housing ID is greater than 1.149 inches (29.18 mm).
c.
Replace the lube oil pump if the clearance between housing ID and outer rotor OD is greater than 0.011 inch
(0.280 mm).
6-11
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