TM-9-2350-311-10

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

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 405 of 775

TM 9--2350--311--10

3--7

3--4

TROUBLESHOOTING — CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TRANSMISSION

8.

VEHICLE DOES NOT DRIVE; TRANSMISSION DOES NOT OPERATE IN ANY SHIFT POSITION.

Step 1. Check transmission oil level.

If low, fill as necessary (item 2, Appx G).

Step 2. Check for disconnected or broken universal joints.

If disconnected or broken, notify unit maintenance.

TRACKS AND SUSPENSION

9.

VEHICLE PULLS TO ONE SIDE WITH STEERING WHEEL IN CENTER POSITION.

Step 1. Check for mud or dirt buildup on tracks.

Clean tracks as necessary.

Step 2. Check track tension.

Adjust as necessary (para 3--5.5).

Step 3. Check final drive sprockets for even wear (Table 2--1).

If necessary, reverse sprockets. If excessive wear exists, notify unit maintenance.

10. VEHICLE THROWS TRACK(S).

Step 1. Check for loose or worn track.

Adjust as necessary (para 3--5.5). If replacement is necessary, notify unit maintenance.

Step 2. Check for improper driving or operation of vehicle.

If necessary, modify driving or operation of vehicle. Do not make high speed turns.

PERSONNEL HEATER

11. PERSONNEL HEATER FAILS TO OPERATE; PERSONNEL HEATER SMOKES OR BANGS UPON

STARTING.

Check to see if you are starting personnel heater correctly (para 2--17.1).

If personnel heater still does not operate, notify unit maintenance.

12. HEAT OUTPUT IS TOO LOW.

Check position of HEAT SELECTOR switch.

Place HEAT SELECTOR switch in HIGH position.