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 120 of 1176
TM 9-2320-361-24-1
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0006 00-24
MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)
Table 20. Water Tank (M50A3) Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. WATER CANNOT BE
PUMPED FROM BOTH
TANKS
1. Check delivery pump drive shaft
and universal joints for breaks.
2. Check transfer PTO for proper
operation.
3. Check delivery pump strainer for
contamination or restrictions.
1. If drive shaft is broken, replace
(WP 0292 00 or WP 0293 00).
2. If universal joints are broken,
replace (WP 0141 00).
1. If transfer PTO is inoperative,
check PTO linkage for proper
operation and adjustment
(WP 0133 00).
2. If transfer PTO linkage is
operating properly and transfer
PTO is defective, replace PTO
(WP 0348 00).
1. If delivery pump strainer is
restricted, clean or replace
strainer (WP 0284 00).
2. If water system is clean and
delivery pump propeller is
operating at correct speed,
replace delivery pump
(WP 0280 00).
2. WATER CANNOT BE
PUMPED OR PUMPS
SLOWLY FROM SELECTED
TANK, AND WATER
DRAINS SLOWLY FROM
SELECTED TANK USING
GRAVITY PROCEDURES
1. Check discharge control cables
for proper lubrication
(WP 0020 00).
2. Check discharge control cables
for breaks, bends, or kinks.
3. Check discharge control cables
for improper adjustment.
4. Inspect discharge valve tubes for
bent, crushed, broken, or leaking
tubes.
5. Inspect discharge valves for
proper operation.
Lubricate control cables if
necessary.
If discharge control cables are
broken, bent, or kinked, replace
(WP 0290 00).
If cable requires adjustment,
remove slack in cable
(WP 0290 00).
If discharge valve tubes are bent,
crushed, broken, or leaking, replace
(WP 0289 00).
If discharge valves are broken or
inoperative, replace (WP 0289 00).
3. WATER PUMPS OUT OF
BOTH TANKS MORE
SLOWLY THAN NORMAL
1. Check transfer PTO speed
control linkage for proper
operation and adjustment
(WP 0294 00).
2. Remove delivery pump strainer
and check for restrictions (WP
0284 00).
Adjust transfer PTO speed control
linkage (WP 0294 00).
1. If delivery pump strainer is
restricted, clean or replace
(WP 0284 00).
2. If water system is clean and
water still pumps slowly, replace
delivery pump (WP 0280 00).
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