Operation and maintenance manual

Drive Belt, Cooling Fan QSB4.5 and QSB6.7
Page A-16 Section A - Adjustment, Repair, and Replacement
Inspect all system pulleys for embedded debris:
• Rocks, stones
• Metal
• Belt material.
Remove the debris from the grooves of the pulley. If the
pulley has been deformed as a result of foreign material
embedment, the pulley MUST be replaced.
Install
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.
Route the drive belt on the engine using the belt diagram
created in the Remove section. Do not install the belt over
the water pump pulley at this time.
Pivot the tensioner in the direction of the spring tang and
install the drive belt, slipping the belt over the water pump
pulley last.
Slowly release the tensioner to apply tension to the drive
belt.
Check the alignment of the belt with the tensioner and the
rest of the front end accessory drive.
Finishing 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.
• Connect the batteries. Refer to the OEM service
manual.
• Operate the engine and check for belt squeal.
Excessive belt squeal indicates belt slippage.
• If belt squeal is present, check the routing of the belt to
make sure that the belt is installed correctly on each
pulley.