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

  TM-9-2320-361-20 - Page 133 of 1207

TM 9-2320-361-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Step 3.
Step 4.
Step 5.
Check delivery pump strainer for restrictions.
a. If restricted, clean or replace delivery pump strainer (para. 12-40).
NOTE
If no. 2 diesel fuel is being used and ambient air temperature is 32°F (0°C), the
outlet pressure could be as low as 5 psi (34.5 kPa) (TM 9-2320-361-10 for fuel
filter separator inlet and outlet pressure differences).
b. If fuel system is clean and pressure is low, replace delivery pump (para. 12-33).
Check PTO speed control linkage for proper operation and adjustment (para. 13-20).
Check discharge valve control levers operation.
a. If control levers operation is defective, remove and inspect (para. 12-20).
b. If control lever assembly components are defective, replace (para. 12-20).
Check transfer case power takeoff operation,
If transfer case power takeoff is not operating, perform malfunction 59.
END OF TESTING!
75. FUEL DOES NOT PUMP OR PUMPS FUEL SLOWLY FROM SELECTED TANK, AND FUEL DRAINS SLOWLY
FROM SELECTED TANK USING GRAVITY PROCEDURES
Step 1. Check discharge control cables for proper lubrication (LO 9-2320-209-12-1).
Step 2. Check discharge control cable for breaks or kinks.
If discharge control cable is broken or kinked, replace (para. 12-20).
Step 3. Check discharge control cable for proper adjustment.
If control cable needs adjustment, remove slack in cable (para. 12-20).
Step 4. Inspect discharge valve tubes for bent, crushed, broken, or leaking tubes.
Replace discharge valve tubes if bent, crushed, broken, or leaking (para. 12-21).
Step 5. Inspect discharge valves for proper operation.
If discharge valves are broken or inoperative, replace (para. 12-18 or 12-19).
END OF TESTING!
76. FUEL TANK COMPARTMENTS CANNOT BE SUCTION FILLED
Step 1. Check delivery pump propeller shaft for broken universal joints or broken shaft.
a. If shaft is broken, replace (para. 12-49 or 12-51).
b. If universal joints are broken, replace (para. 7-4).
Step 2. Perform fuel filter separator check (TM 9-2320-361-10).
If fuel filter separator is restricted, replace (para. 12-39).
Step 3. Check delivery pump strainer for restrictions.
a. If strainer is restricted, clean or replace (para. 12-40).
NOTE
If no. 2 diesel fuel is being used and ambient air temperature is 32°F (0°C), the
outlet pressure could be as low as 5 psi (34.5 kPa) (TM 9-2320-361-10 for fuel
filter separator inlet and outlet pressure differences).
b. If fuel system is clean and pressure is low, replace delivery pump (para. 12-33).
2-48


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