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 124 of 1176
TM 9-2320-361-24-1
0006 00
0006 00-28
MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)
Table 21. Personnel Fuel Burning Heating Troubleshooting Procedures (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. HEATER WILL NOT
OPERATE
WARNING
• Diesel fuel is flammable. Do not
perform troubleshooting checks
near open flame, sparks, or
electricity. Injury or death to
personnel may result.
• Compressed air source must not
exceed 30 psi (207 kPa). Wear
eyeshields when cleaning with
compressed air. Failure to wear
eyeshields may result in injury to
personnel.
1. Refer to Heating System
Troubleshooting Procedures in
WP 0015 00, malfunction 3.
2. Make sure fuel shutoff valve is in
full ON position.
3. Check heater fuel filter for
contamination (WP 0354 00).
4. Check fuel lines for breaks,
bends, kinks, or leaking joints.
5. Check fuel pump discharge.
6. Inspect exhaust system for
restrictions.
7. Check for proper operation of
defroster and heat diverter
control cables
(TM 9-2320-361-10).
If fuel shutoff valve is damaged (or
stuck in OFF or partial ON
position), replace fuel shutoff valve
(WP 0377 00).
If water or contamination is
present, clean and flush entire fuel
system. Dry with compressed air.
If broken, kinked, or leaky joints
are found in fuel lines, replace
(WP 0376 00 and WP 0383 00).
1. Remove fuel line from fuel pump
output (WP 0353 00).
2. Use a clean container for fuel
discharge recovery.
3. Position heater control box to
RUN position.
4. If fuel pump fails to pump an
adequate amount of fuel, 1/2 pint
(0.24 liter) in 30 seconds, replace
(WP 0353 00).
If exhaust pipe is restricted or
damaged, repair or replace
(WP 0355 00).
1. If vent or control cables are
broken, replace (WP 0248 00 and
WP 0249 00).
2. If fuel burning heater still fails to
operate, replace fuel burning
heater (WP 0351 00).
END OF WORK PACKAGE
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