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 TM 5-4320-258-34
parallel to the flat surface of the casting.
(2) Remove the 18 screws (6) and lock
(2) To replace the neoprene seals (12 and
washers (7) that secure the oil pan (8) to the block;
16) on the filler blocks (13 and 17), make sure the
remove the oil pan and gaskets (9).
contact surface is free of cement, dirt, and oil. To hold
(3) Remove the two cap screws (10) and
the seal in place for assembly, use a small spot of
lock washers (11) that secure the front filler block (13) to
nonhardening cement in the center of the contacting
the block; remove the filler block and seal (12).
surface before inserting the seal in the groove. No other
(4) Remove the two cap screws (14) and
cement is required.
lock washers (15) that secure the rear filler block (17) to
(3) Lubricate all seals with engine oil. With
the block; remove the filler block and seal (16), oil guard
the crankshaft in place, the assembled rear oil guard
seal (18), and oil guard (19).
b. Cleaning and Inspection.
(19) and jute seal (18) can be rolled into place around
the crankshaft. Position the assembled rear filler block
(1) Discard and replace gaskets and seals.
(17) and seal (16) on the engine block; secure with the
(2) Clean all remaining parts with cleaning
two cap screws (14) and lock washers (15). Tighten the
solvent (FED. Spec. P-D-680); dry thoroughly.
cap screws to 15 to 20 foot-pounds torque.
(3) Inspect the oil pan for cracks, severe
(4) Position the front filler block (13) and
dents, holes, damaged threads, and other damage;
seal (12) on the engine block; secure with the two cap
replace a damaged oil pan.
screws (10) and lock washers (11). Tighten the bolts to
(4) Inspect the filler blocks for cracks,
15 to 20 foot-pounds torque.
distortion, and other damage; replace damaged filler
(5) Position the gaskets (9) on the oil pan
blocks.
c. Installation.
(8). Install the oil pan and gaskets on the engine block;
secure with the 18 cap screws (6) and lock washers (7).
(1) Install the seal (18, fig. 4-7) in the rear
Tighten the screws to 15 to 20 foot-pounds torque.
filler block (17) and oil guard (19) as follows:
4-7.
Engine Oil Pump
(a) Flatten the jute seal in a vise or
a. Removal and Disassembly.
with a hammer until the seal fits into the groove in the
(1) Remove the engine oil pan (para 4-6).
filler block or oil guard.
(2) Remove the nut (1, fig. 4-8) and lock
(b) Roll the seal into the oil guard or
washer (2) that secure the engine oil pump to the
filler block groove with a round object.
bearing cap; remove the oil pump and flat washer (3).
(c) Trim the seal 0.020 to 0.030 inch
(3) Disassemble the oil pump as shown in
above the flat surface of the oil guard or filler block,
using a sharp knife or razor blade. Make sure the cut is
KEY to fig. 4-8:
1. Nut
2. Lock washer
3. Flat washer
4. Screen
5. Cap Screw
6. Lock Washer
7. Spacer
8. Strainer frame
9. Frame-to-cover gasket
10. Cap screw
11. Lock washer
12. Cover
13. Cover gasket
14. Pin
15. Drive gear
16. Retaining ring
17. Driver gear
18. Key
19. Drive shaft
20. Idler gear
21. Idler gear stud
22. Body bushing
23. Oil pump body
24. Stud
25. Crankshaft bushing
4-13
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