TM-9-2320-386-24-1-2

2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL; VOLUME 2 OF 2

MAY 2001

TM-9-2320-386-24-1-2 - Page 478 of 636

DISASSEMBLY

1. Remove four screws (1) and washers (9) from oil pump (3).

2. Remove five screws (8) from front support (7).

3. Separate oil pump (3) from front support (7).

4. Remove pump drive gear (4), pump drive gear (5), and seal ring (6) from oil pump (3). Discard seal

ring (6).

5. Remove oil seal (2) from oil pump (3). Discard oil seal (2).

WARNING

Main-pressure regulator and valve lockup springs are under

spring compression. Do not remove retainer ring or lower pin

until remover/installer is in place, as springs will fly out causing

injury.

6. Install main-pressure regulator remover/installer on front support (7). Tighten screw of remover/

installer to compress spring stop (13) against spring (12).

7. Loosen remover/installer screw and remove retaining ring (14), spring stop (13), spring (12), and

main-pressure regulator (11) from valve bore (15) of front support (7).

8. Remove main-pressure regulator remover/installer.

9.

Compress spring stop (17) against spring (18).

10.

Remove dowel pin (10), spring stop (17), spring (18), and lockup valve (19) from lockup valve

bore (16) of front support (7).

0374 00-4

TM 9-2320-386-24-1-2

0374 00

TRANSMISSION OIL PUMP MAINTENANCE (Contd)