TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 357 of 1207
TM 9-2320-361-20
3-29. SECONDARY AND FINAL FUEL FILTERS TESTING AND MAINTENANCE
This task covers:
a. Testing Fuel Pressure
e. Cleaning and Inspection
b. Draining
f. Fuel Filters Installation
c. Fuel Filter Head, Secondary, and
g. Fuel Filter Head, Secondary, and
Final Fuel Filters Removal
Final Fuel Filters Installation
d. Fuel Filters Removal
h. Bleeding Air
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-361-10
TEST EQUIPMENT
TM 9-2320-361-20P
Fuel pressure gage, NSN 4910-00-225-8673
EQUIPMENT CONDITION
MATERIALS/PARTS
Parking brake set (TM 9-2320-361-10).
Hood raised and secured (TM 9-2320-361-10).
Three lockwashers
Four washers
GENERAL SAFETY INSTRUCTIONS
Six gaskets
Diesel fuel is flammable. Do not perform fuel
Two filter elements
system procedures near flames.
Two cotter pins
Keep fire extinguisher nearby when using
Rag (Appendix C, Item 21)
drycleaning solvent.
Drycleaning solvent (Appendix C, Item 26)
a. Testing Fuel Pressure
WARNIN G
Diesel fuel is flammable. Do not perform fuel system procedures
near open flame. Injury or death to personnel may result.
NOTE
Fuel filters may have either one or two bleeder valves. Remove only
one bleeder valve for testing fuel pressure.
1. Remove bleeder valve (1) or (4) from top of fuel filter head (5).
2. Install adapter (3) and fuel pressure gage (2).
CAUTION
Do not start engine. Starting engine may damage fuel pressure gage.
3. Turn accessory switch to ON position (TM 9-2320-361-10) to start fuel pump.
4. Read pressure on fuel pressure gage (2). If pressure reads at least 2 psi (13.8 kPa), condition of all
fuel filters is satisfactory. If not, turn accessory switch to OFF position (TM 9-2320-361-10) and
inspect for damaged fuel supply tubes (9) and, if necessary, replace primary fuel filter (para. 3-28). If
pressure is still not at least 2 psi (13.8 kPa), continue with task b. to replace secondary and final
fuel filter.
3-54
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