TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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NOTE Have drainage container ready to catch oil. 1. Remove drainplug (4), and drain geared hub (1). Install drainplug (4) into geared hub (1). Tighten drainplug (4) to 8-13 lb-ft (11-18 N•m). 2. Remove four capscrews (7), washers (6), and steering arm cover (5) from geared hub (1). NOTE For new configuration, two locktabs must be bent away from retaining nut for removal. 3. Bend locktab (12) on key washer (9) away from retaining nut (10). 4. Using retaining nut wrench, remove retaining nut (10) and key washer (9) from spindle (8). Discard key washer (9). NOTE If four-slotted retaining nut TN-07 is present, it is recommended to replace it with eight-slotted retaining nut 12342680. 5. Apply grease to face of retaining nut (10) and install key washer (9) and retaining nut (10) on spindle (8). 6. Using retaining nut wrench, tighten retaining nut (10) to 35-45 lb-ft (47-61 N•m). 7. Rotate spindle (8) five full rotations clockwise and five full rotations counter clockwise to properly seat bearings. 8. Loosen retaining nut (10) until it is finger tight, then retighten nut to 23-27 lb-ft (31-37 N•m). WARNING Ensure locktab on key washer is bent completely into slot on retaining nut. Eight-slotted retaining nut provides additional security by enabling two locktabs on key washer to be bent into slots on retaining nut. Failure to do this may cause injury to personnel or damage to equipment. NOTE • For new configuration, two locktabs must be bent into slots on retaining nut. • It may be necessary to slightly loosen or tighten retaining nut to gain proper alignment with locktabs. 9. Determine which locktab (12) on key washer (9) aligns with slot (11) in retaining nut (10). Bend locktab (12) into slot (11) on retaining nut (10). Adjustment 6-14. GEARED HUB SPINDLE BEARING ADJUSTMENT This task covers: Adjustment INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Special Tools Wrench (Appendix B, Item 127) Materials/Parts Key washer (Appendix G, Item 65) Sealer (Appendix C, Item 39) Sealing compound (Appendix C, Item 45) Grease (Appendix C, Item 22) Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition Wheel removed (para. 8-3). General Safety Instructions Ensure locktab on key washer is bent completely into slot on retaining nut. TM 9-2320-280-20-2 6-38 Change 3