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 584 of 1275

TM9-2350-311-20-1

3 Start engine and warmup to 170°F (77°C) (TM9-2350-311-1O).

4 Disconnect fuel return hose (3) from female half of quick disconnect (4).

Ensure valve in quick disconnect is pushed all the way in during the test.

5 Place female half of quick disconnect (4) in suitable container to catch fuel.

6 Set engine at 1200 rpm.

Fuel is a hazardous waste and must be disposed of in accordance with local

procedures or direction of the local Hazardous Waste Management office.

7 Depress valve of female half of quick disconnect (4) for 1 minute. Measure the fuel container(5). If fuel flow is

less than 0.5 gal (1.9 L) per minute, check for broken shaft in fuel pump or dirt in relief valve (para 6-8).

8 Reconnect fuel return hose (3) at female half of quick disconnect (4).

NOTE

FOLLOW-ON MAINTENANCE:

Close air intake grille (para 11-8)

WARNING