LiftMaster BG770 Industrial-Duty Single Arm Barrier Gate Operator - Manual (Page 8)

8
I N S T A L L A T I O N
ARM ATTACHMENT
For easier access during installation, the top cover of the unit may
be opened by removing the two wing nuts from underneath,
inside the cabinet.
MODEL BG770: STANDARD ARM
Attach arm to the arm hub flange (Figure 5).
MODEL BG770: OPTIONAL ARM
Attach arm to the arm hub flange (Figure 6).
DETAIL B
DETAIL A
When following the procedure below, the motor belt will turn
and the drive shaft will move during some of the steps. Keep
hands and tools out of the gate cabinet and away from the
belt and drive shaft or SERIOUS INJURY may result. Be sure
to DISCONNECT power while installing the arm attachment.
WARNING
Figure 6
Figure 5
(2) Flat Washers
Hex Nut Hex Bolt
(2) Flat Washers
Hex Bolt
1/2"-13 x 2-1/4"
Lock Washer and
1/2"-13 Hex Nut
Flat Washer
Hex Bolt
Flat Washer
Threaded Spacer
Flat Washer
Hex Bolt
Flat Washer
Hex Nut
Hex Nut
Threaded Rod
Gate Arm
Hub Flange
See Detail B
See Detail A
(4) Hex Bolts
Extension Arm
S Screw
Lift Arm