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
