
3
1
Maintenance
Chapter 6
5)
CHECKING PULLEYS:
Roll the belt off and look at both pulleys. If the pulley has grooves in it or
is no longer smooth, it needs replacement. A loose or slipping belt will reduce fan performance up
to 60% and cause premature belt failure.
6
)
BELT TIGHTENING:
To adjust the belt tensioner to the proper setting, loosen 10 mm bolt (using
17mm
spanner
) to allow tensioner arm to rotate. Turn
spanner
clockwise until
the single mark on
base of the belt tensioner is aligned with mark 2 on the tensioner arm. Hold
tensioner at this
setting and tighten the 10mm bolt to 54 Nm.
Smooth
Pulley
Grooved
Pulley
WARNING
!
Do not power wash
electrical devices.
WARNING
!
Moving parts, disconnect
power before servicing.
Alignment Mark
on Base
Mark 2 on Ten-
sioner Arm
10mm
Bolt
Hex on tensioner