TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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3-81. SERPENTINE DRIVEBELT MAINTENANCE (Cont’d) TM 9-2320-387-24-1 3-142.2 Change 1 c. Alignment CAUTION Serpentine belt failure (abnormal wear or belt dislodgement) can be caused by misalignment of pulleys, improper installation or foreign objects introduced into belt path. Damage to equipment may result. NOTE Ensure tab of pulley alignment tool seats flush against back side of crankshaft pulley. 1. Position tab (1) of pulley alignment tool (5) behind crankshaft pulley (6) and straight edge portion (4) of pulley alignment tool (5) across power steering pump pulley (2) and alternator pulley (3). Tab (1) on pulley alignment tool (5) should seat flush against back side of crankshaft pulley (6). Straight edge portion (4) of pulley alignment tool (5) should seat flush against power steering pump pulley (2) and alternator pulley (3). If pulley alignment is not flush, rotate engine and recheck alignment in several locations. Proceed to step 3 if pulleys are out of alignment. 2. Position straight edge portion (4) of pulley alignment tool (5) against idler pulleys (7) and check for bent mounting bracket (8). If mounting bracket (8) is bent, refer to para. 3-82 for replacement. NOTE If any adjustments are made while performing steps 3 through 8, start engine and check for proper tracking of belt. 3. Check all pulleys (2), (3), (6), (7), and (12) for mud or foreign objects lodged in grooves. NOTE Power steering pump pulley must be flush with end of power steering pump shaft. 4. Check power steering pump pulley (2) for proper installation. Refer to para. 8-23. 5. Check power steering pump (11) and power steering/alternator mounting bracket (10) for proper installation and security of mounting hardware. Refer to paras. 4-3 and 8-23. 6. Check alternator pulley (3) for proper installation. Refer to para. 4-2. 7. Check alternator (9) for proper installation and security of mounting hardware. Refer to para. 4-5 8. Check idler pulleys (7) and mounting bracket (8) for proper installation and security of mounting hardware. Refer to para. 3-82. 9. Repeat steps 1 and 2 to verify alignment. POWER STEERING PUMP PULLEY ALTERNATOR PULLEY PULLEY ALIGNMENT TOOL TAB CRANKSHAFT PULLEY