TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0006 00 0006 00-21 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.