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 00-17 MECHANICAL SYSTEMS TROUBLESHOOTING - UNIT (Contd) Table 12. Wheels and Tires Troubleshooting Procedures (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 2. VEHICLE SHIMMY, WOBBLE, OR VIBRATION 1. Check for loose inner wheel adapter nuts or loose lugnuts (WP 0006 00, table 11, malfunction 1, step 3). 2. Check for dirt or mud buildup on wheel. 3. Check for bent or damaged wheel. 4. Check wheel bearings for proper adjustment and damage. Raise wheel off ground. Use prybar to check for excessive play. 5. Inspect steering knuckles for loose conditions. 6. Check drag link for defects (WP 0195 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). Clean dirt and mud from wheel. If bent or damaged, replace wheel (WP 0186 00). 1. Adjust wheel bearings (WP 0189 00). 2. If damaged, replace wheel bearings (WP 0187 00 or WP 0188 00). If damaged, replace steering knuckles (WP 0150 00). 1. If linkage parts are defective, replace (WP 0195 00). 2. Perform steering gear adjustment (WP 0193 00). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. EXCESSIVE PLAY IN STEERING 1. Check for correct tire pressure (TM 9-2320-361-10). 2. Check steering gear for secure mounting. 3. Inspect pitman arm, drag link, steering arm, steering knuckles, and tie-rod ends for looseness or damage. 4. Check wheel bearings for proper adjustment and damage. Raise wheel off ground. Use prybar to check for excessive play. 5. Adjust steering gear, refer to WP 0193 00. Adjust tire pressure, if necessary. If loose, tighten mounting screws 62–68 lb-ft (84–92 N•m). 1. Replace loose or damaged parts (WP 0191 00 – WP 0195 00). If steering arm or knuckle is damaged, replace (WP 0150 00). 2. Reset correct toe-in (WP 0190 00). 1. Adjust wheel bearings if necessary (WP 0189 00). 2. If damaged, replace wheel bearings (WP 0187 00). If play in steering continues, replace steering gear (WP 0192 00). 2. STEERING WHEEL HARD TO TURN 1. Inspect pitman arm, drag link, steering arm, steering knuckles, and tie-rod ends for binding, damage, or lack of lubrication. 1. Replace damaged parts (WP 0191 00 – WP 0195 00). If steering arm or knuckle is damaged, replace (WP 0150 00). 2. If binding, lubricate (WP 0020 00). Table 13. Steering Troubleshooting Procedures.