MECHANICAL SYSTEMS TROUBLESHOOTING

TM 9-2320-361-24-1

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FIELD TROUBLESHOOTING

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)

MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT

NOTE

Refer to the general troubleshooting instructions in

Introduction to Troubleshooting (WP 0004 00) prior to

performing any mechanical troubleshooting.

Table 1. Engine Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Verify proper voltage is present

If voltage is not present, refer to

1. ENGINE WILL NOT

at starter (WP 0012 00, table 2,

WP 0012 00, table 2, malfunction 1.

CRANK

malfunction 2, test 3).

1. If starter teeth are damaged,

2. Remove starter (WP 0088 00)

replace starter (WP 0088 00).

and visually check starter drive,

ring gear, and flywheel for

2. If ring gear is damaged, replace

broken or missing teeth.

flywheel (WP 0029 00).

WARNING

Ensure fuel shutoff valve is off and

remove throttle cable before

cranking engine. Failure to do so

may result in injury to personnel.

If engine is seized, replace engine

3. Check for seized engine or fluid-

(WP 0046 00).

locked pistons. Remove radiator

and rotate engine at vibration

damper bolt two full revolutions

with starter removed.

1. If water pump drive pulley will

4. Check water pump, and belt-

not turn, replace water pump

driven accessories. Remove all

(WP 0082 00).

belts (WP 0084 00 and

WP 0182 00). Manually turn

2. If any drive pulley accessory will

drive pulley of each accessory

not turn, replace accessory

and water pump.

(WP 0085 00, and WP 0180 00).

5. Check air induction system for

If air cleaner cover is restricted or

presence of water or restrictions.

contaminated with water, replace

Remove air cleaner cover

element (WP 0052 00).

(WP 0052 00).

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