Greenheck RDU/RBU/RBUMO (455700) - Manual (Page 6)

Propeller Upblast Roof Fans 6
6
Propeller Upblast Roof Fans
Adjust Tension - Remove Motor
(Images 3, 4 and 5)
Once the prop is removed you can gain access
to the motor and drives. There are 4 bolts on
the motor plate that need to be loosened to
allow the belt tension to be adjusted.
For motor removal, it is recommended that you
remove the motor plate and motor at the same
time. Large motors will require a lift to secure
the motor while removing the fasteners and to
lift the motor plate assembly out of the unit.
Image 3: Loosen bolts - adjust motor plate
Image 4: Adjust motor plate
Image 5: Adjust belt tension
Prop Removal
(Image 1 and 2)
Loosen the set screw located on the side of the
bushing. Remove the 3 top bolts on the bushing that
fasten to the prop. Insert 2 of these bolts into the two
threaded holes on the bushing to separate the bushing
and the wheel. Make sure the prop is supported so that
it is not damaged on the support angles. May need to
use a gear puller to assist in this process.
Image 1
Image 2
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