TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 120 of 1176
TM 9-2320-361-24-1 0006 00 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).