TM-9-2320-361-24-1

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2

AUGUST 2006

TM-9-2320-361-24-1 - Page 129 of 1176

TM 9-2320-361-24-1

0008 00

0008 00-1

FIELD TROUBLESHOOTING

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

MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT

NOTE

Test run engine after each completed action.

Table 1. Engine Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ENGINE WILL NOT

CRANK

Inspect fuel injection pump for

seizure.

1. Remove drive gear access cover

(WP 0069 00).

2. Remove injection pump drive gear

(WP 0069 00).

3. Manually turn injection pump

shaft at center hub screw.

WARNING

• Ensure fuel shutoff valve is off

and remove throttle cable before

cranking engine. Failure to do so

may result in injury to personnel.

• All personnel must stand away

from engine during crank test.

Wear eye protection during crank

test. Failure to stand clear and

wear eye protection may cause

injury or death to personnel.

4. Check engine cylinders for fluid

locked pistons. Remove all fuel

injector nozzles (WP 0067 00).

Crank engine with starter.

If shaft will not rotate, replace

(WP 0069 00) or repair fuel injection

pump (WP 0446 00).

1. If crankshaft turns freely, identify

any fluid levels expelled from

cylinders. If fluid sample is

identified as coolant, proceed to

step 11.

2. If fluid sample is identified as fuel,

refer to

WP 0008 00, table 2,

malfunction 4.