6.2. Renewing fan drive belt, checking
operation of belt monitor
64
– Remove one machine screw at belt pulley „1“.
– Press back tensioning pulley „2“ and lock it
with the machine screw provided.
– Unscrew and remove the belt pulley.
– Take off the Poly-V belt.
Note:
If any grooves on the belt pulley have broken off
or are bent, always renew the pulley.
Checking operation of belt monitor
Always check operation of the shutdown device
when the belt is renewed.
65
– Remove the machine screw to release the pis-
ton with tensioning pulley „1“.
– Spring pressure will force the piston with ten-
sioning pulley out of the housing.
– Angled lever „2“ rotates downwards and re-
leases shutdown pin „3“.
Important !
Shutdown pin „3“ must be forced out by spring
loading or else automatic shutdown will not take
place if the belt breaks.
Installing the fan drive belt
66
– Push in shutdown pin „1“.
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