TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 637 of 1275

TM9-2350-311-20-1

7-8 INLET THERMOSTATS AND HOUSING ASSEMBLY

This task covers:

a. Removal

b. Installation

General mechanic’s tool kit (item 64, Appx H)

Handle (item 27, Appx H)

Installer (item 31, Appx H)

Socket adapter (item 2, Appx H)

Socket set (item 55, Appx H)

Torque wrench (item 73, Appx H)

Materials/Parts

Adhesive (item 3, Appx D)

Gasket (item 129, Appx G)

Gasket (item 131, Appx G)

Lockwashers (10) (item 88, Appx G)

Sealing compound (item 57, Appx D)

Seals (2) (item 132, Appx G)

Equipment Conditions

Coolant system drained (TM 9-2350-311-10)

a. Removal

Ensure engine and coolant system are cool enough to permit safe handling in order to

prevent bums.

1 Loosen two clamps (1).

2 Remove housing-to-radiator tube (2).

3 Remove six screws (3), six Iockwashers (4), and six washers (5). Discard Iockwashers.

4 Remove inlet housing (6) and gasket (7). Discard gasket.

5 Remove two thermostats (8) and two seals (9) by pulling outward. Discard seals.

6 Remove three screws (10) and three Iockwashers (11) at engine coolant manifold (12). Remove protective

cover (13) if present. Discard Iockwashers.

7 Remove nut (14), Iockwasher (15), and stud (16). Discard Iockwasher.

8 Loosen two clamps (17).

9 Remove manifold connector (18) and gasket (19). Discard gasket.

7-32

INITIAL SETUP

Tools

WARNIN G