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24.7.6 CHECK FAN BELT TENSIONER
BEARING BELT AND FAN HUB.
•
Check fan belt
Remove the drive belt by lifting tensioner using a 3/8 inch square drive
wrench to release the tension.
Inspect the belt for damage.
Replace belt if any damage is found.
•
Check tensioner bearing
With the fan belt removed rotate fan hub.
The tensioner pulley should spin freely with no rough spots
defected under hand pressure.
•
Check the tensioner bearing.
•
Replace bearing if damaged.
•
Check fan hub. With the drive belt removed, rotate fan hub.
The fan hub should spin freely without excessive end play.
•
Check the fan hub bearing.
•
Replace bearing if damaged.
24.7.7 CHECK FAN BELT TENSION
•
Measure the belt deflection at the longest span of the belt.
•
Maximum deflection: 9.5-12,7 mm (3/8-1/2 inch)
If tension is low (deflection is outside range):
(see 24.7.6. "Check fan belt tensioner bearing, belt and fan hub.")
•
Check belt & replace if damaged
•
Check tensioner & replace if damaged
24. SERVICE PROCEDURE
3-67
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