MAINTENANCE
Page 139
Refer to ASET™ AC ENGINE DRIVE BELT
SPECIFICATIONS section for belt sizing and part
numbers.
Refer to ASET™ AC SCHEMATIC and
ROUTING DIAGRAMS section for accessory
drive belt routings.
The tensioner for the crankshaft-to-fan drive hub
is mounted to the timing gear cover. This
tensioner spring loads in a counterclockwise
direction to apply load to the belt. The accessory
drive belt tensioner is mounted on the new water
pump assembly. There are two possible
mounting locations for this tensioner depending
on the chassis model and if equipped with an air
conditioner. The tensioner spring-loading
direction (clockwise with A/C or counterclockwise
non-A/C) for applying load to the belt is
determined by the mounting location.
Automatically Tensioned System
INSTALLATION
Swing the tensioner to the fully sprung position
and, without force, place the belt over the pulleys.
Do not allow the tensioner to snap against its
stops. Do not pry the belt over a pulley.
TENSIONING
No tensioning adjustment is required. Once the
tensioner is released against the belt, the belt is
tightened to optimum tension automatically at all
speeds and loads.
MAINTENANCE
The condition of the belt and tensioner should be
checked when performing preventive
maintenance inspections A, B, C and D as
outlined in the Maintenance and Lubrication
manual, TS494. Belt tension levels need not be
checked as long as the tensioner is in good
condition and there is no evidence of a loose belt.
5-111.bk Page 139 Monday, July 10, 2006 2:26 PM
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