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 132 of 1176
TM 9-2320-361-24-1
0008 00
0008 00-4
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. ENGINE CRANKS
BUT WILL NOT START
(Contd)
2. If wet compression readings
increase 50 psi (345 kPa) or more,
piston rings or cylinder bores may
be worn. Replace engine
(WP 0046 00).
4. ENGINE STARTS BUT
STOPS WHEN
ACCELERATOR IS
OPERATED
1. Check fuel leakage at inlet side of
fuel supply pump (mounted on
fuel injection pump).
2. Check fuel delivery system for
defective components.
Refer to WP 0008 00, table 2,
malfunction 1, step 4. Replace
defective components.
Refer to WP 0008 00, table 2,
malfunction 1. Replace defective
components.
5. ENGINE STOPS
WHEN
ACCELERATOR IS
RETURNED TO IDLE
POSITION
Check fuel delivery system.
Refer to WP 0008 00, table 2,
malfunction 1. Replace defective
components.
6. POOR
ACCELERATION
AND/OR LACK OF
POWER
1. Check vehicle clutch system for
slippage.
2. Check fuel delivery system for
defective parts.
3. Check fuel injection pump timing
is set within specifications
(WP 0069 00).
4. Check turbocharger operation.
Remove plug from top of inlet
manifold. Install low pressure
gauge with adapter into plug
opening. Start engine and
accelerate engine to full throttle
and immediately decelerate.
Observe pressure gauge readings.
5. Check turbocharger outlet, hose,
intake manifold elbow and gasket
for leaks (WP 0057 00).
Refer to WP 0008 00, table 4,
malfunction 2. Replace defective
components.
Refer to WP 0008 00, table 2,
malfunction 1, steps 1–5. Replace
defective parts.
If fuel injection pump timing is
incorrect, adjust (WP 0069 00).
If no gauge movement or only a
small pressure increase by gauge is
evident, replace turbocharger
(WP 0057 00).
1. Tighten base screw and clamps.
Replace missing components.
2. If no improvement during test
run, remove and inspect
turbocharger hose, intake
manifold elbow, and gaskets for
defects. Replace defective
components (WP 0057 00).
Table 1. Engine Troubleshooting Procedures (Contd).
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