Operation and maintenance manual

Drive Belt, Cooling Fan QSB4.5 and QSB6.7
Page A-14 Section A - Adjustment, Repair, and Replacement
Drive Belt, Cooling Fan
General Information
Due to the number of drive belt arrangements, this
procedure does not cover all available cooling fan drive
belt routing.
To make sure the cooling fan drive belt is routed correctly
upon installation, make a diagram of the cooling fan belt
routing prior to removing the belt as shown in the
illustration.
The cooling fan belt routing typically consists of the
following components, but may not include all of them:
1 Crankshaft pulley/vibration damper
2 Fan pulley
3 Water pump pulley
4 Refrigerant compressor pulley
5 Alternator pulley
6 Tensioner idler pulley.
NOTE: Some engine driven belts are installed/supplied by
the vehicle's original equipment manufacturer (OEM). See
the OEM service manual for removal and installation
instructions.
Preparatory Steps
WARNING
Batteries can emit explosive gases. To reduce the
possibility of personal injury, always ventilate the
compartment before servicing the batteries. To
reduce the possibility of arcing, remove the negative
(-) battery cable first and attach the negative (-)
battery cable last.
• Disconnect the batteries. Refer to the OEM service
manual.
Remove
CAUTION
The belt tensioner is spring-loaded and must be
pivoted away from the drive belt. Pivoting in the
wrong direction can result in damage to the belt
tensioner.
The belt tensioner winds in the direction that the spring
tang is bent over the tensioner body. To loosen the
tension on the belt, rotate the tensioner to wind the spring
tighter.