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 134 of 1207

TM 9-2320-361-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WATER TANK (M50A2 AND M50A3)
77. WATER CANNOT BE PUMPED FROM BOTH TANKS
Step 1. Check delivery pump driveshaft and universal joints for breaks.
a. If driveshaft is broken, replace (para. 12-49, 12-50, 12-51, or 12-52).
b. If universal joints are broken, replace (para. 7-4).
Step 2. Check delivery pump drivechain and sprocket for breaks.
If delivery pump drivechain or sprocket is broken, replace (para. 12-33).
Step 3. Check transfer PTO for proper operation.
a. If transfer PTO is inoperative, check PTO linkage for proper operation and adjustment
(paras. 6-2 and 6-3).
b. If transfer PTO linkage is operating properly and transfer PTO is defective, notify your
supervisor.
Step 4. Check delivery pump strainer for contamination or restrictions.
a. If delivery pump strainer is restricted, clean or replace strainer (para. 12-40).
b. If water system is clean and delivery pump propeller is operating at correct speed,
replace delivery pump (para. 12-33).
END OF TESTING!
78. WATER CANNOT BE PUMPED OR PUMPS SLOWLY FROM SELECTED TANK, AND WATER 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 cables for breaks, bends, or kinks.
If discharge control cable is broken, bent, or kinked, replace (paras. 12-44 through 12-46).
Step 3. Check discharge control cable for improper adjustment.
If cable requires adjustment, remove slack in cable (para. 12-47).
Step 4. Inspect discharge valve tubes for bent, crushed, broken, or leaking tube.
If discharge valve tubes are bent, crushed, broken, or leaking, replace (para. 12-44 or
12-45).
Step 5. Inspect discharge valves for proper operation.
If discharge valves are broken or inoperative, replace (paras. 12-46).
END OF TESTING!
79. WATER PUMPS OUT OF BOTH TANKS SLOWER THAN NORMAL
Step 1. Check transfer PTO speed control linkage for proper operation and adjustment (para. 12-53).
Step 2. Remove suction strainer from suction hose and check for restrictions (para. 12-40).
If suction strainer is restricted, clean or replace (para. 12-40).
Step 3. Check delivery pump strainer for restrictions.
a. If delivery pump strainer is restricted, clean or replace (para. 12-40).
b. If water system is clean and water still pumps slowly, replace delivery pump (para. 12-33).
END OF TESTING!
2-49


Back to Top