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 101 of 1176
TM 9-2320-361-24-1
0006 00
0006 00-5
MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. POOR ACCELERATION
AND/OR LACK OF
POWER (Contd)
8. Check turbocharger hoses and
intake manifold elbow for leaks.
9. Inspect around cylinder head for
evidence of a blown head gasket
(e.g., air bubbles, oil, coolant, etc.).
10. Inspect radiator cap for milky
film.
11. Inspect fuel shutoff for proper
adjustment (WP 0071 00).
1. Tighten base screws and clamps.
Replace any missing screws or
clamps (WP 0051 00).
2. If there is no improvement
during test run, turbocharger
malfunction is indicated; replace
turbocharger (WP 0057 00).
Replace head gasket (WP 0027 00).
If radiator cap has milky film on or
around it, check cylinder heads and
gaskets for defects (WP 0027 00).
Adjust fuel shutoff to proper
position (WP 0071 00).
8. ENGINE SURGES
1. Check fuel system for
contamination and restrictions.
2. Inspect throttle linkage for
proper operation and adjustment
3. Check in-tank fuel pump
operation (WP 0061 00).
Refer to WP 0006 00, table 1,
malfunction 2, step 2.
If linkage does not operate properly,
adjust or replace as necessary
(WP 0070 00).
If fuel pressure is uneven or below
specifications, replace in-tank fuel
pump (WP 0061 00).
9. EXCESSIVE OIL LOSS OR
CONSUMPTION DURING
NORMAL OPERATION
1. Check oil level for overfilling
(TM 9-2320-361-10).
2. Check for external oil leaks at oil
pan, drainplug, oil filter, oil filter
housing, oil cooler, oil dipstick
tube, rocker arm cover, oil feed
lines, and turbocharger.
3. Inspect radiator cap for milky
film.
4. Verify engine idle speed is set
within specifications
(WP 0070 00).
5. Check oil pressure gauge for
proper operation (WP 0014 00,
table 1, malfunction 4).
If oil level is too high, drain the
crankcase to safe operating level
(WP 0020 00).
Tighten any loose connections or
loose screws that may cause leaks.
If radiator cap has milky film on or
around it, check cylinder heads and
gaskets for defects (WP 0027 00).
If engine idle speed is incorrect,
adjust (WP 0070 00).
1. Replace inoperative oil pressure
gauge (WP 0095 00).
2. If oil pressure gauge has
maximum reading of 60 psi
(413kPa) and needle peaks at 60
psi (413kPa), replace with new
oil pressure gauge (range 0–120
Table 1. Engine Troubleshooting Procedures (Contd).
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