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 143 of 1176
TM 9-2320-361-24-1
0008 00
0008 00-15
MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. NO FUEL AT FUEL
INJECTORS (Contd)
NOTE
Air entering fuel delivery lines may
block fuel flow. Air can enter lines
when fittings are loose or lines or
fittings are defective. This is
indicated by leaking fuel.
2. Check operation of fuel injector
nozzle. Remove fuel injector
(WP 0067 00) and bench test fuel
injector nozzle
(TM 9-2815-210-34-1 and -2).
3. Check fuel delivery lines mounted
on, and from, fuel injection pump
(WP 0068 00).
4. Check fuel supply pump operation
(TM 9-2910-226-34).
a. Clean dirt, grease, and paint
from fuel delivery line fitting at
the final fuel filters, which are
mounted in fuel supply pump.
b. Operate in-tank fuel pump and
crank engine.
c. Observe the green port of fuel
supply pump.
5. Check fuel injection pump delivery
operation.
a. Loosen one injector line nut in
hydraulic head.
b. Operate in-tank fuel pump and
crank engine.
c. Observe location of loose
injector line nut in hydraulic
head.
1. If fuel injector nozzle operation is
incorrect, clean, adjust, and retest
(TM 9-2815-210-34-1 and -2).
2. If fuel injector nozzles are
internally defective, replace
(WP 0067 00).
If fuel delivery lines are leaking or
restricted, tighten lines or fittings,
repair fuel delivery lines, or replace
fittings (WP 0068 00). Bleed air from
fuel injection system (WP 0064 00).
If no fuel flows from outlet port of
fuel supply pump, replace fuel supply
pump (TM 9-2910-226-34).
If some traces of fuel, or no fuel
pressure is evident, replace fuel
injection pump (WP 0069 00).
Table 2. Fuel System Troubleshooting Procedures (Contd).
Back to Top
