MECHANICAL TROUBLESHOOTING

TM 9-2320-386-24-1-1

0010 00

UNIT TROUBLESHOOTING PROCEDURES

EXTENDED SERVICE PROGRAM (ESP)

TRUCK, CARGO, 2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

M35A3, W/O WINCH (NSN 2320-01-383-2047); W/WINCH (NSN 2320-01-383-3850);

M35A3C, W/O WINCH (NSN 2320-01-383-2050); W/WINCH (NSN 2320-01-383-2049);

M36A3, W/O WINCH (NSN 2320-01-383-2048); W/WINCH (NSN 2320-01-383-2046).

MECHANICAL TROUBLESHOOTING

GENERAL

NOTE

If malfunction corrective action does not correct malfunction,

notify direct support maintenance.

a. This work package provides information to diagnose and correct malfunctions of the mechanical

system at the unit maintenance level.

b. This work package cannot list all mechanical malfunctions that may occur. If a malfunction occurs

that is not listed, notify direct support maintenance.

Unit Mechanical Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE

NOTE

Engine should be test run after each completed action.

1. ENGINE WILL NOT CRANK

Step 1. Check that transmission is in neutral position.

Place in NEUTRAL position if transmission is engaged.

Step 2. Check starting system (Electrical Troubleshooting, WP 0011 00).

Step 3. Check belt-driven engine accessories for seizure.

a. Remove fan and water pump drivebelts (WPs 0081 00 and 0084 00).

b. Manually turn drive pulley of each accessory.

c. Replace component if any accessory drive pulley will not turn.

Step 4. Check air compressor for seizure.

a. Remove air compressor (WP 0169 00), and manually turn drive gear.

Replace air compressor if drive gear does not turn (WP 0169 00).

b. If engine will not crank, notify direct support maintenance.

Step 5. Check engine for fluid-locked pistons.

Remove exhaust and intake tubes from turbocharger. If water is present, notify direct

support maintenance.