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 612 of 1275

TM9-2350-311 -20-1

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NOTE

Hoses must cover unpainted areas of tubes and fittings or be positioned evenly

between red bands on tubes and housings.

Engine must be warmed up and then run for a minimum period of 5 minutes (para

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

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Apply adhesive at connections (1, 5, and 7) between hoses and mating tubes or castings.

Install main coolant tube (13) on tube connections (1,5,7, and 12).

Secure, but do not tighten, clamp (12), nut (11), new Iockwasher (10), and screw (9) on main coolant tube (13).

Secure, but do not tighten, clamp (7) on radiator lower tube assembly (8).

Secure, but do not tighten, two clamps (5) on lower end of bypass thermostat lower housing-to-engine coolant

main tube inlet hose (6).

Apply adhesive at connection (3) between hose and mating tube. Install surge tank tube-to-engine coolant

main tube inlet hose (4) and secure, but do not tighten, clamp (3).

Secure, but do not tighten, clamp (1) on main inlet hose (2).

Refill coolant system (TM 9-2350-31 1-10).

Start engine and allow engine to run at least 5 minutes. Shut off engine (para 4-5).

Torque clamps (1, 5, 7, and 12) to 4&60 lb-in. (4.5-6.8 N·m). Torque clamp (3) to 20-40 lb-in. (2.3-4.5 N-m).

NOTE

FOLLOW-ON MAINTANENCE:

Install powerplant (para 4-5)

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