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 617 of 1275

TM9-2350-311-20-1

7-5 SURGE TANK AND PRESSURE RELIEF VALVE —

CONTINUED

b.

Installation — Continued

5 Screw two nuts (8 and 9) back on.

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).

Torque all hose clamps as follows:

— 0.5 to 1 in. (12.7 to 25.4 mm) od hose: 15-25 lb-in. (1.7-2.8 N·m)

— 1 to 2 in. (25.4 to 50.8 mm) od hose: 20-40 lb-in. (2.345 N·m)

— Above 2 in. (50.8 mm) od hose: 40-60 lb-in. (4.5-6.8 N·m)

6 Tighten two clamps (6 and 7).

7 Tighten two clamps (4) at elbow (5).

8

Install retainer (3), two washers (2), and two screws (1).

NOTE

FOLLOW-ON MAINTENANCE:

Fill coolant system (TM 9-2350-311-1 0)

Install engine exhaust deflector (para 4-5)

Install engine exhaust grille (para 4-5)

Install grille support plate (para 4-5)

Install radiator fan access door (para 4-5)

Install right front grille assembly (para 4-5)

Install right transmission door (para 11-7)

Close air intake grille (para 11 -8)

7-12