Figure 4-26. Engine Oil Pump Assembly, Exploded View

TM 10-3930-623-34

1. Stud

2. Nut

3. Lock Washer

4. Drive Gear

5 Pin

6. Screen

7. Pickup Screen Frame

8. Screw

9. Frame Spacer

10. Gasket

1 . Oil Pump Cover

12. Gasket

13. Driven Gear

14. Retaining Ring

15. Woodruff Key

16. Idler Gear

17. Idler Gear Shaft

18. Pump Drive Shaft

19. Pump Body

20. Bushing

Figure 4-26. Engine Oil Pump Assembly, Exploded View

temporarily reinstall bearing cap in original position on

4-95. DISASSEMBLY.

rod. Repeat this procedure for each connecting rod.

1. Remove screen (6, figure 4-26), screw (8),

frame (7), spacer (9), pump cover (11), gaskets (10 and

NOTE

12), retaining ring (14), gears (13 and 16), key (15) and

stub shaft (17).

Tag piston with cylinder number to

insure returning piston to correct

2. Drive out pin (5) and remove gear (4), bushing

cylinder.

(20) and drive shaft (18).

4-98. DISASSEMBLY.

4-96. PISTONS AND CONNECTING RODS.

1. If piston rings (12, 13, 14 and 15, figure 4-28)

are not to be reused, remove them from the piston (16)

4-97. REMOVAL

by breaking them off. Remove retaining rings (17) from

1. Ream top ridge from cylinder bores as shown in

each piston, push out pin (18) and separate piston from

figure 4-27 if pistons are to be removed.

rod (20).

2. Remove cotter pins (19, figure 4-28) and nuts

2. If piston pin bearings (23) are to be replaced,

(22) from connecting rod. Remove connecting rod cap

press out old bearing with new one, thus installing new

(20) and bearing inserts (24). Push connecting rod and

bearing at the same time, see paragraph 6-22.

piston assembly out through top of cylinder and

4-30