LiftMaster J door operator - Manual (Page 17)

17
HOIST AND JACKSHAFT
Typical installation - Hoist and Jackshaft
MOUNTING
INSTALL THE MANUAL DISCONNECT
1
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3
Place the door sprocket on the door shaft.
Fasten Door retaining bracket 4 feet above the fl oor.
Door retaining bracket
Door retaining bracket
Place the operator drive sprocket on the appropriate side of the
operator for your installation type.
Wrap the drive chain around the door sprocket and the drive
sprocket then secure with the master link.
4
Align the door and the drive sprockets. Insert keys and
fasten the sprockets with the set screws. NOTE: It is highly
recommended to add a thread adhesive to secure the set
screws in place.
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