Section V. REPAIR OF OIL PAN AND OIL PUMP
a. Remove drain plug (1) and gasket (2).
The oil pump is internally mounted at the bottom of the
b. Remove capscrews (3) and oil pan (4). Remove
crankcase and is gear driven by the camshaft Oil is
drawn from the pan through a screen at pump. 13-26.
c. Remove Capscrew (6) and lockwasher (7) and
Removal Refer to figure 13-5 and remove the oil pan and
lower oil pump from engine.
Note. To remove the oil pump, it is necessary to position
crankshaft rear counterweight away from the oil pump
disassemble oil pump as foIlows.
a. Remove gasket (8), cotter pin (9), and inlet
(12),pump cover (13) and gasket (14).
c. With the pump cover removed and the gears id
shaft in place, press against the gears with the thumb to
push the gears away from the outlet side the pump.
Measure the clearance between outside diameter of
gear and bore of the housing. Compare with values
shown in table 1-4. If less an this value, replace body or
shaft. Check the pump shaft clearance in the bore.
Compare with values given in table 1-4. Check backlash
between pump body gears. If this exceeds the amount
d. Lift out idler gear (15) and shaft (16). Drive It pin
(17) and remove drive gear (18) and key 9). Pull drive
shaft and gear (20) from pump body (21).
Figure 13-5. Oil pan and oil pump, exploded view.
a. Clean all metal parts in dry cleaning solvent
Federal Specification P-S-661) and dry thoroughly with
b. Clean all remaining gasket material from arts.
Check the drive gear on the oil pump drive shaft for ear,
cracks or chipped teeth.
Note. In no case should a new oil pump drive gear be
used the a proferal type camshaft. The proferal type
gear may be; identified by the darker color.
13-30. Repair and Replacement
a. Refer to checks during disassembly.
b. Refer TM 5-3810-294-34P for repair parts.
13-31. Reassembly and Installation
oil pump and pan as follows.
b. Insert drive shaft and gear (20) into pump body