TM-9-2350-311-34-2

CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-2 - Page 420 of 552

TM 9-2350-311-34-2

9-5

OIL PUMP AND LINES -CONTINUED

b. Disassembly

1

Separate oil pump body (18) from retaining plate (19). Remove and discard gasket (20).

2

Remove two retaining rings (21) from headless grooved pin (22). Discard retaining rings.

3

Remove headless grooved pin (22), roller (23), and two flat washers (24) from clevis of stem assembly (25).

Helical compression spring is under preload. Wear eye protection and make provision to contain

parts when preload is released during disassembly.

NOTE

Threads of stem assembly may have been staked to secure plunger.

4

Unscrew plunger (26) from threaded end of stem assembly (25).

5

Remove stem assembly (25) and helical compression spring (27) from oil pump body (18). Discard helical

compression spring.

6

Place retaining plate (19) in a soft-jawed vise.

7

Remove and discard lower plug (28) and ring spacer (29).

Helical compression springs are under preload. Wear eye protection and make provision to contain

parts when preload is released during disassembly.

8

Remove externally threaded ring (30), inlet valve pump seat (31), inlet valve seat (32), and helical compres-

sion spring (33) from retaining plate (19) and discard.

9

Remove upper plug (34), ring spacer (35), helical compression spring (36), outlet valve plate (37), and outlet

valve seat (38) from retaining plate (19) and discard.

9-26