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You may find it helpful to refer back to this page as you proceed with the installation of your opener.
Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with glass panels, etc.).
See page 20 for details.
Support bracket &
fastening hardware
is required.
See page 13.
— — — — — — — —
Door Center
Header Wall
Safety
Reversing
Sensor
Floor must be level
across width of door
FINISHED CEILING
Extension Spring
Torsion Spring
Access Door
OR
OR
One-Piece Door-Extension Spring
Header
Wall
Door
Track
Before you begin, survey your garage area to see whether any of the conditions below apply to
your installation.
SECTIONAL Door or
ONE-PIECE Door with Track Installation
Safety Reversing Sensor
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 13.
Safety
Reversing
Sensor
Header
Wall
Access Door
Gap between floor and bottom of
door must not exceed 1/4".
ONE-PIECE Door Without Track Installation
5
10
U
P
C
E
I
L
I
N
G
M
O
U
N
T
O
N
L
Y
12
11
6
5
N
O
TIC
E
7
9
LIGHT
LOCK
1
13
14
15
4
12VDC
3
2
8
1
The Chamberlain Group, Inc.
LM Screw Drive #114A1794
6/20/94
8
4
5
2 3
7
6
Rail Assembly Parts
Installation Parts
32
KEY PART
NO. NO. DESCRIPTION
1 41A4795 Hardware bag (Includes
sprocket coupling)
2 12B569-1 Left rail bracket
3 12B569-2 Right rail bracket
4 81C168 Rack
5 41C4677 Complete trolley
assembly
6 1D4828-1 One-piece T-rail
7 41A4836 Drive sprocket kit
8 25A18 Sprocket coupling
KEY PART
NO. NO. DESCRIPTION
1 41A4202A Multi-function door control panel
2 41A4166 Lighted door control button
3 10A14 12V battery
4 29C128 Transmitter visor clip
5 41A3984-7 Remote control case, cover & screw only (no
circuit board)
6 41A2828 Manual release rope & handle assy.
7 217A238 2-Conductor bell wire - white & white/red
8 41A5047 Door bracket w/clevis pin & fastener
9 41A4353 Header bracket w/clevis pin & fastener
10 41A4373A Safety sensor kit (receiving and sending eyes
with 3' 2-conductor bell wire attached)
11 178B35 Curved door arm section
12 178B34 Straight door arm section
13 12B483 C-wrap bracket
14 12B484 Square hole bracket
15 12B485 Slotted bracket
NOT SHOWN
41A4116 Safety sensor hardware
41A4675-4 Opener installation hardware bag
(includes hardware listed on page 3)
114A1794 Owner's manual
Repair Parts