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 117 of 1176
TM 9-2320-361-24-1
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MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. PTO INOPERATIVE
(TRANSMISSION-
DRIVEN)
Check PTO. Engage power takeoff
and visually confirm output
propeller shaft rotation.
1. If propeller shaft is noisy, inspect
propeller shaft and universal
joints. If propeller shaft is bent
or universal joints have play,
repair or replace (WP 0346 00).
2. If propeller shaft is not rotating,
inspect control linkage. Adjust
control linkage and replace
defective parts (WP 0347 00).
3. If problem still exists, replace
PTO (WP 0349 00).
4. PTO INOPERATIVE
(TRANSFER-DRIVEN)
Check PTO. Engage and visually
confirm output propeller shaft
rotation.
1. If propeller shaft is noisy, inspect
propeller shaft and universal
joints. If propeller shaft is bent
or universal joints have play,
repair or replace (WP 0139 00).
2. If propeller shaft is not rotating,
inspect control linkage. Adjust
control linkage and replace
defective parts (WP 0133 00).
3. If problem still exists, replace
PTO (WP 0348 00).
Table 17. Power Takeoff (PTO) Troubleshooting Procedures (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. SPEEDOMETER OR
TACHOMETER BOUNCES,
NOISY, OR INOPERATIVE
1. Inspect speedometer or
tachometer drive shaft for
binding and kinks.
2. Remove speedometer or
tachometer (WP 0096 00) and
check speedometer or tachometer
cable operation.
3. Check drive unit on transfer
case.
If drive shaft is bent or kinked,
replace (WP 0097 00, WP 0098 00,
or WP 0099 00.)
If cable is operating properly,
replace speedometer or tachometer
(WP 0096 00).
If drive unit is damaged, replace
(WP 0097 00, WP 0099 00).
2. AIR PRESSURE GAUGE
INOPERATIVE
Check air pressure with a known
working air pressure gauge.
If test gauge works properly,
replace inoperative air pressure
gauge (WP 0094 00).
Table 18. Non-Electrical Gauges Troubleshooting Procedures.
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