Chamberlain LJ8950W Manual page 11

Installation
2
Mount the Door Operator (continued)
MOUNT THE DOOR OPERATOR AND ATTACH THE CHAIN
1. Raise the door operator to approximate mounting position. Align the drive sprocket
with the door sprocket.
NOTE: The drive sprocket can be mounted in one of three positions to aid in the
alignment of the drive sprocket with the door sprocket.
2. Wrap the chain around the door sprocket and drive sprocket.
3. Connect the ends of the chain using the master link.
4. Raise or lower the door operator until the chain is taut but not tight. Make sure the
door operator motor shaft is parallel to the door shaft.
5. Fasten the operator to the mounting surface with the appropriate hardware
(not provided).
6. Tighten the drive sprocket bolts using a 5/32" Allen wrench.
Mounting Hardware
(not provided)
LIVE SHAFT DOOR
Chain
Tighten drive
sprocket
11
If the operator is mounted below 8 ft.
(2.5 m), chain guard model 3950CGJ must
be installed to protect against possible
injury, see accessories page 30.
Mounting Hardware
(not provided)
DEAD SHAFT DOOR
Chain