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TM-9-2320-361-24-1 Page 110

TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks

Page 110 of 1176


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MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. DIFFERENTIAL NOISY 1. Check to see if front wheel drive is engaged. 2. Check lubrication level in axle housing differential (WP 0020 00). 3. Check for loose inner wheel adapter nuts or loose lugnuts. 4. Check for loose or damaged wheel bearings. Raise wheel off ground. Use prybar to check for excessive play. 5. Check differential operation. Remove differential propeller shaft(s) (WP 0139 00). Raise wheels (TM 9-2320-361-10), manually turn wheels, and observe differential operation. Disengage front wheel drive when traveling on hard, flat surfaces. If low, fill to proper oil level (WP 0020 00). 1. If inner wheel adapter nuts are loose, tighten 400–425 lb-ft (542–576 N•m). 2. If lugnuts are loose, tighten 325–355 lb-ft (441–481 N•m). 1. Adjust wheel bearings if loose (WP 0189 00). 2. If damaged, replace wheel bearings (WP 0187 00 or WP 0188 00). 1. If tires will not rotate, check brakeshoe condition and operation (WP 0167 00). 2. Remove brake drums (WP 0187 00 and WP 0188 00). If brake system components are defective, repair or replace as necessary (WP 0167 00 –WP 0176 00). 3. If tires still will not rotate, replace differential (WP 0454 00). 4. If tire rotation drags at some points during full rotation, remove and inspect axle shafts (WP 0142 00 or WP 0147 00). 5. If axle shafts are defective, replace (WP 0142 00 or WP 0147 00). TM 9-2320-361-24-1 0006 00 0006 00-14 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) Table 11. Differential Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION PROPELLER SHAFT VIBRATION 1. Inspect propeller shaft for foreign material or damage. 2. Inspect propeller shaft for loose screws. 3. Check universal joints for play or looseness. If rust is visible around U-joint, disassemble and inspect (WP 0141 00). 4. Remove U-joint, disassemble, and inspect (WP 0141 00). Clean foreign material from propeller shaft, or replace if damaged (WP 0139 00). If any screws are loose, tighten (WP 0139 00). Repair or replace U-joint (WP 0141 00). Replace U-joint if damaged (WP 0141 00). Table 10. Propeller Shaft Troubleshooting Procedures.