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 0008 00 0008 00-23 MECHANICAL SYSTEMS TROUBLESHOOTING - DIRECT SUPPORT (Contd) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. DIFFERENTIAL NOISY 1. Check transfer case operation and noise. (Refer to WP 0008 00, table 6, malfunction 4.) 2. Check differential operation. Remove differential drive propeller shafts (WP 0139 00). Raise wheels and manually turn wheels and observe differential operation. If tires still do not rotate, replace differential assembly (WP 0454 00). 2. DIFFERENTIAL CLUNKS DURING TURNS OR INITIAL TAKEOFF Check differential internal operation. Remove differential and disassemble. Repair or replace as necessary (WP 0454 00 and WP 0455 00). 3. DIFFERENTIAL LEAKS OIL 1. Check differential shaft seals condition. Inspect for presence of gear oil at gaskets and companion flange areas. 2. Check axle housing condition. Inspect axle housing for external evidence of gear oil. 1. If oil is present, replace seals and gaskets (WP 0149 00). 2. If seals replacement does not correct problem and leak continues, remove differential and repair (WP 0454 00 and WP 0455 00). 1. If axle housing has pinhole leaks, repair or replace axle housing (WP 0148 00 and WP 0151 00). 2. If axle housing is cracked or damaged, replace (WP 0148 00 and WP 0151 00). 4. ABNORMAL TIRE WEAR (FRONT AXLE) Check steering knuckle sleeve bushings condition and end play. 1. If steering knuckle sleeve bushings are defective, replace (WP 0150 00). 2. If steering knuckle end play is excessive, adjust (replace with correct shim) (WP 0150 00). 3. If steering knuckle end play remains excessive, replace sleeves or axle housing (WP 0148 00 and WP 0150 00). 5. ABNORMAL TIRE WEAR (REAR AXLE) Check rear end frame and suspension alignment (WP 0206 00). If alignment is incorrect, adjust (WP 0206 00). Table 7. Differential Troubleshooting Procedures.