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 639 of 1275

TM9-2350-311-20-1

7-8 INLET THERMOSTATS AND HOUSING ASSEMBLY — CONTINUED

b. Installation

WARNIN G

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

order to prevent burns.

Adhesives are toxic and flammable. Apply adhesives only in a well-ventilated area.

Avoid contact with skin, eyes, and clothes, and don’t breath vapors. Do not use

near heat, sparks, or open flame. Read and follow all warnings and instructions on

labels of adhesives. If contact with skin or eyes is made, wash area with water and

seek medical aid immediately.

1 Apply adhesive to mating surface of manifold coolant connector (18) and crossover tube (20).

2 Install new gasket (19) and manifold coolant connector (18). Tighten two clamps (17).

3 Apply sealing compound to stud (16) and install in manifold connector (18). Install new Iockwasher (15) and nut

(14).

4 Install protective cover (13), three new Iockwashers (11), and three screws (10) on engine coolant manifold

(12).

5 Install two new seals (9) into inlet housing (6) with leather facing outward using installer and handle.

6 Install two thermostats (8).

7 Install new gasket (7) and inlet housing (6) on manifold coolant connector (1 8).

8 Install six washers (5), six new lockwashers (4), and six screws (3).

9 Apply adhesive to mating surface of housing-to-radiator tube (2). Install tube.

10 Tighten two clamps (1).

NOTE

Engine must first be warmed up and then run for a minimum period of 5 minutes. Shut

engine down before all hose clamps are retightened (para 4-5).

11 Torque two clamps (1) to 40-60 lb-in. (4.5-6.8 N·m).

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