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 131 of 1176
TM 9-2320-361-24-1
0008 00
0008 00-3
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE WILL NOT
CRANK (Contd)
12. Test run engine.
13. Test run engine.
1. If engine operates with unusual
sounds or vibration, refer to WP
0008 00, table 1, malfunction 16
and 17.
2. If engine exhaust color remains
white during test run, remove
cylinder heads and gaskets and
inspect for damage. Replace
defective parts (WP 0027 00).
If engine exhaust color remains
white during test run, replace engine
(WP 0046 00).
2. STARTER CRANKS
ENGINE SLOWLY
1. Check electrical system for proper
voltages (WP 0012 00, table 2,
malfunction 2).
2. Check fuel injection pump for
seizure (WP 0008 00, table 1,
malfunction 1, step 1).
3. Check internal engine components
for seizure (WP 0008 00
malfunction 1, step 4).
Replace defective components as
necessary.
Replace fuel injection pump if
necessary (WP 0069 00).
Replace engine if necessary
(WP 0046 00).
3. ENGINE CRANKS
BUT WILL NOT START
1. Check fuel delivery system
(WP 0008 00, table 2,
malfunctions 1 through 3).
2. Visually check valve train
operation and that valve lash is
within specifications
(WP 0031 00).
3. Check engine cylinders for low
compression readings
(WP 0008 00, table 1,
malfunction 11).
Replace defective components as
necessary.
1. If valve train is not operating
properly, check camshaft and
crankshaft gears for damaged or
missing teeth. Remove timing
cover (WP 0032 00) and replace
both gears (TM 9-2815-210-34-2-1)
if either gear is damaged.
2. If valve lash is not within
specifications adjust valve lash
(WP 0031 00).
3. If valve lash cannot be adjusted
within specifications, check valve
train components for wear or
defects (WP 0031 00). Replace
worn or defective components.
1. If compression readings are low or
zero, perform wet compression
test (WP 0008 00, table 1,
malfunction 11).
Table 1. Engine Troubleshooting Procedures (Contd).
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