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 144 of 1176
TM 9-2320-361-24-1
0008 00
0008 00-16
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. LOW FUEL SUPPLY AT
INJECTOR NOZZLES
1. Check fuel injection pump timing
to engine (WP 0069 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.
2. Check fuel injection pump internal
timing.
a. Ensure fuel shutoff valve is off.
b. Remove radiator (WP 0077 00).
c. Slowly rotate crankshaft in
clockwise direction
(TM 9-2815-210-34-1). Stop
crankshaft rotation when correct
timing mark on crankshaft
damper is
2 in. (560.8 mm) before engine
timing pointer.
d. Place fuel shutoff cable in RUN
position and throttle lever in
FUEL LOAD position.
e. Remove plug from hydraulic head
delivery valve.
f. Remove valve spring and install
plug in delivery line.
g. Remove No.1 injector fuel
delivery line from No.1 injector.
h. Remove timing cover located on
fuel injector advance unit
(WP 0069 00).
i. Operate in-tank fuel pump.
j. Slowly turn engine crankshaft in
clockwise direction. Fuel flow
should be evident from No. 1
injector fuel delivery line until
damper timing mark aligns with
engine timing pointer.
If fuel injection pump timing to
engine is incorrect, adjust to
specifications (WP 0069 00).
If no fuel flows or fuel continues to
flow to No. 1 injector line when
advance unit hub timing mark is
1/16 in. (1.6 mm) from advance unit
timing pointer replace fuel injection
pump (WP 0069 00).
3. FUEL INJECTORS
INOPERATIVE
Perform WP 0008 00, table 2,
malfunction 1, test 1.
Replace defective components.
Table 2. Fuel System Troubleshooting Procedures (Contd).
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