9
Releasing & Engaging a Drum Motor
Equipped with a Manual Release Backstop (MRB) Device
NOTE: The drum motor is shipped with the Backstop device engaged.
To Release the Backstop Feature:
1.
Bring the drum motor to full stop and disconnect power .
2.
Remove the shaft cap located on the shaft end, opposite the junction
box or cable entry .
3.
Using a 10mm deep socket 1/4” drive and a ratchet; insert socket into
the shaft and turn clockwise until the end, approximately 15 turns and
allow motor to rotate freely in opposite direction .
4.
Remove socket and re-install the shaft cap .
The motor will operate in both directions .
To Engage the Backstop Feature - Repeat Steps 1 & 2:
3.
Using a 10mm deep socket 1/4” drive and a ratchet; insert socket into
the shaft and turn counter clockwise, approximately 15 turns .
NOTE
: Do not exert force to turn the socket as some movement for
the drum may be necessary to align the shaft to engage to its mating
part . Forcing the rotation of the socket may result in damage to inter-
nal components .
4.
Once re-engaged, remove the socket and re-install the shaft cap .
The motor will operate in only the direction indicated by the brass
arrow mounted on the side of the unit .
If you require assistance, contact VDG (Van der Graaf) Technical Support:
1 (866) 595-3292 or email: service@vandergraaf .com
