TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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TM 9-2320-280-20-2 8-30 Change 3 8-9. TIRE BALANCING Personnel Required One mechanic One assistant Manual References TM 9-2320-280-24P Equipment Condition Wheel removed (para. 8-3). This task covers: Balancing NOTE • Wheel and tire must be clean and free of foreign material. • Wheel must be centered on balancer utilizing lug nut mounting holes. 1. Mount tire (1) and wheel (2) on balancer, curb side up. 2. Locate and mark light spot (5) on tire (1). NOTE • If more than 29 oz. of weight is required to balance tire, wheel and runflat must be disassembled and tire rotated 180° on wheel. • Tires can be balanced using either adhesive backed or clip on type weights. Follow steps 3 through 10 if using adhesive backed weights, or steps 11 through 15 for clip on type weights. 3. Add 6 oz. of weight (4) to center of light spot (5) between wheel (2) and clamp ring (3) until weight required to balance tire (1) is met or exceeded. Do not permanently attach weights (4) at this time. 4. If weight requirement is exceeded, evenly remove weights (4) in 1/2 oz. increments from each side of light spot (5) until tire (1) and wheel (2) are properly balanced. 5. Record amount of weights (4) used, and remove tire (1) and wheel (2) from balancer. 6. Working from light spot (5) on front side of tire (1), mark rear side of tire (1) and inside of wheel (2) for light spot (5) identification. 7. Temporarily attach weights (4) with tape to inside of wheel (2), in a radial direction, following weight placement diagram. 8. Repeat step 1 and add or subtract weights (4) until tire (1) is properly balanced. NOTE Wheel must be smooth and clean before attaching wheel weights. 9. Remove adhesive backing from weights (4) and attach to inside of wheel (2) following weight placement diagram. 10. Repeat step 1 to ensure tire (1) is properly balanced. 11. Place a 6 oz. weight (6) on edge of wheel (2) with clip (7) centered on light spot (5). Do not permanently attach weight (6) at this time. 12. Check wheel (2) and tire (1) for proper balance. If necessary, add weights (6), or replace 6 oz. weight (6) with a lighter weight (6), making sure weight clips (7) are centered on light spot (5) and weight (6) are not permanently attached. Balancing INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, item 1) Test Equipment Bubble balancer (Appendix B, Item 130) Materials/Parts Wheel balance weights (as required) (Appendix G, Item 2) Chalk (Appendix C, Item 15)