Chamberlain BG770 Installation Manual

CALCULATE ARM LENGTH
To calculate the arm length:
Subtract the height of the output shaft and concrete pad (40")
from the height to ceiling.
EXAMPLE:
If height to ceiling is 8'3" (99"), calculation is as follows:
99" (height to ceiling) - 40" (height of the output shaft and
concrete pad) = 59"
Lower arm should be 59".
INSTALLATION
1
Drill 1/2" diameter hole 4-1/2" up from the center of the output
shaft and 4-1/2" back from the center of the output shaft
(Figure 1).
2
Attach gate arm (lower) to arm hub fl ange (Figure 2).
5.88
8.88
4.5
Output
Shaft
Figure 1
4.5
PART #
01-G0711
07-8043
10-8041
12-8041
12-8049
82-HN38-20
82-HN50-22
65-1201-L
65-1202-L
82-HN50-52
84-LH-50
84-RH-50
84-RH-52
84-WH-38
85-FW-50
85-LS-50
11-8045
* Supplied with "Articulated Wood Arm" Kit, part # G651210
* Not supplied with "Articulated Wood Arm Hardware Kit", part # G651210K
Service
Access
Door
Barrier Gate Enclosure
Gate Arm Hub
Lower Arm
Gate Bracket
Hex Bolt,
1/2"-13 x 2-1/4"
1
ARTICULATED ARM
GATE OPERATORS
MODEL BG770
CARTON INVENTORY
ITEM
Installation Instructions
1" O.D. x 1/2" I.D. x 1-1/2"L Spacer
Hinge Plate
3/4" O.D. x 3/8" I.D. x 7/8"L Spacer
Female Rod End
3/8"-16 x 1-1/2"L Hex Bolt
1/2"-13 x 1-3/4"L Hex Bolt
Lower Arm*
Extension (Upper) Arm*
1/2"-13 x 3-1/4"L Hex Bolt
1/2"-13 Nylock Nut
1/2"-13 Hex Nut
1/2"-20 Hex Nut
3/8"-16 Serrated Hex Nut
1/2" Flatwasher
1/2" Lockwasher
Linkage Rod*
Lockwasher,
1/2" Hex Nut
Typical (X4)
QTY
1
1
2
2
2
5
1
1
1
1
1
1
2
5
4
3
1
Figure 2