Chamberlain C253 User manual

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Contents
Preparation......................................2-5
Assembly .......................................6-10
Installation ..................................11-28
Install the Door Control............21-22
Install the Protector System......23-26
Connect Power.........................27-28
Adjustments.................................29-31
myQ® Smartphone Control.................32
Operation.....................................33-36
Features .......................................34
Using your Garage Door Opener.....35
Push Button Door Control..............35
Remote Control and
Keyless Entry................................35
Homelink® ...................................35
To Erase the Memory .....................36
To Open the Door Manually ...........36
Maintenance .....................................37
Troubleshooting...........................38-39
Accessories........................................40
Warranty...........................................41
Repair Parts .................................42-43
Owner’s Manual
C253
Chain Drive
Garage Door Opener
FOR RESIDENTIAL USE ONLY
PRE-PROGRAMMED REMOTE CONTROL
INCLUDED
www.chamberlain.com
www.mychamberlain.com
• Please read this manual and the enclosed safety materials carefully!
• Fasten the manual near the garage door after installation.
• Thedoor WILL NOT CLOSE unless the Protector System® is connected
and properly aligned.
• Periodic checks of the garage door opener are required to ensure
safe operation.
• The model number label is located on the front panel of your garage
door opener.
• This garage door opener is compatible with myQ® and
Security+b2.0® accessories.
• DO NOT install on a one-piece door if using devices or features
providing unattended close. Unattended devices and features are
to be used ONLY with sectional doors.
Garage Opener

2
Safety Symbol and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it is installed, operated,
maintained and tested in strict accordance with the instructions and warnings contained in this manual.
Mechanical
Electrical
When you see these Safety Symbols and Signal Words on
the following pages, they will alert you to the possibility of
serious injury or death if you do not comply with the
warnings that accompany them. The hazard may come
from something mechanical or from electric shock. Read
the warnings carefully.
When you see this Signal Word on the following pages, it
will alert you to the possibility of damage to your garage
door and/or the garage door opener if you do not comply
with the cautionary statements that accompany it. Read
them carefully.
WARNING: This product can expose you to chemicals including lead, which are known to the State of
California to cause cancer or birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov
Unattended Operation
The Timer-to-Close (TTC) feature, the myQ®Smartphone Control app, and myQ Garage Door and Gate Monitor are
examples of unattended close and are to be used ONLY with sectional doors. Any device or feature that allows the
door to close without being in the line of sight of the door is considered unattended close. The Timer-to-Close (TTC)
feature, the myQ Smartphone Control, and any other myQ devices are to be used ONLY with sectional doors.
Check the Door
To prevent possible SERIOUSINJURYor DEATH:
lALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An
unbalanced garage door may NOT reverse when required.
lNEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware,
ALLof which are under EXTREME tension.
lDisable ALLlocks and remove ALLropes connected to garage door BEFORE installation and operating
garage door opener to avoid entanglement.
lDO NOT install on a one-piece door if using devices or features providing unattended close. Unattended
devices and features are to be used ONLY with sectional doors.
To prevent damage to garage door and opener:
lALWAYS disable locks BEFORE installing and operating the opener.
lONLY operate garage door opener at 120V, 60Hz to avoid malfunction and damage.
Before you begin:
1. Disable locks and remove any ropes connected to the garage door.
2. Lift the door halfway up. Release the door. If balanced, it should stay in place,
supported entirely by its springs.
3. Raise and lower the door to check for binding or sticking. If your door binds,
sticks, or is out of balance, call a trained door systems technician.
4. Check the seal on the bottom of the door. Any gap between the floor and the
bottom of the door must not exceed 1/4" (6 mm). Otherwise, the safety reversal
system may not work properly.
5. The opener should be installed above the center of the door. If there is a torsion
spring or center bearing plate in the way of the header bracket, it may be
installed within 4feet (1.2 m) to the left or right of the door center. See page 12.
Torsion
Spring
Extension
Spring
OR
Preparation

3
Before You Connect with Your Smartphone
Monitor and control your garage door from anywhere using the myQ app. You will need a router with Wi-Fi and a
smartphone or other mobile device. Make sure your mobile device is connected to your Wi-Fi network. Hold your
mobile device in the place where your garage door opener will be installed and check the Wi-Fi signal strength.
Wi-Fi signal is weak.
The garage door opener will likely connect to your Wi-Fi
network. If not, try one of the options below.
No Wi-Fi signal. Try one of the following:
• Move your router closer to the garage door opener to
minimize interference from walls and other objects
• Buy a Wi-Fi range extender
• Buy a myQ Internet Gateway (828LG) see page 41
Check Signal Strength. If you see:
Wi-Fi signal is strong. You’re all set!
Install your new garage door opener.
See myQ Smartphone Control page 32 to connect your garage door opener to your Wi-Fi network.
Additional Items You May Need:
Survey your garage area to see if you will need any of the following items:
l(2) 2X4 Pieces of wood : May be used to fasten the header bracket to the structural supports. Also used to
position the garage door opener during installation and for testing the safety reversing sensors.
lSupport bracket and fastening hardware: Must be used if you have a finished ceiling in your garage.
lExtension brackets (MODEL 041A5281-1) or wood blocks: Depending upon garage construction,
extension brackets or wood blocks may be needed to install the safety reversing sensor.
lFastening hardware: Alternate floor mounting of the safety reversing sensor will require hardware not
provided.
lDoor reinforcement: Required if you have a lightweight steel, aluminum, fiberglass or glass panel door.
lRail extension kit: Required if your garage door is more than 7 feet (2.13 m) high.
Tools Needed
3/16
7/16
1/2
5/32
5/16
5/8
9/16
1/4
7/16
Preparation

4
Carton Inventory
Save the carton and packing material until the installation and adjustment is complete. Instructions for the accessories
will be attached to the accessory and are not included in this manual. The images throughout this manual are for
reference only and your product may look different.
Model Power Door Control Remote Control
C253 Med Lift Power System™ Push Button 3-button
A. Header bracket
B. Pulley
C. Door bracket
D. Curved door arm
E. Straight door arm (Packaged inside front rail section)
F. Trolley
NOTE: Be sure to assemble the trolley before sliding onto rail.
G. Emergency release rope and handle
H. Rail (1 front and 4 center sections)
I. Hanging brackets (2) (Packaged inside the front rail section)
J. Garage door opener (motor unit)
K. Chain spreader with screws
L. “U” bracket
M. Chain and cable
N. Door control
O. Remote control - Model 953ESTD
P. The Protector System
Safety reversing sensors with 2 conductor white and white/black wire attached: Sending Sensor (1),
Receiving Sensor (1), and Safety Sensor Brackets (2)
NOT SHOWN
White and red/white wire
Owner's manual
Hardware
N
A
B
C
H
K
J
O
I
D
E
F
G
L
M
P
Preparation

5
Hardware
ASSEMBLY INSTALLATION DOOR CONTROL
Insulated Staples
(Not Shown)
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
Bolt
Nut 3/8" Lock Washer 3/8"
Master Link (2)
Threaded
Shaft Clevis Pin 5/16"x1-1/2"
Ring
Fastener (3)
Hex Bolt 5/16"-18x7/8" (4)
Lock Washer
5/16"-18 (5)
Nut
5/16"-18 (6)
Self-Threading Screw
1/4"-14x5/8" (2)
Clevis Pin 5/16"x1" Clevis Pin 5/16"x1-1/4"
Carriage Bolt
1/4"-20x1/2" (2)
Wing Nut
1/4"-20 (2)
Lag Screw 5/16"-9x1-5/8" (4)
Screw
6ABx1" (2)
Screw
6ABx1-1/2" (2)
Drywall
Anchors (2)
Screw
6-32x1" (2)
Preparation

6
Assembly
STEP 1 Assemble the rail and install the trolley
To prevent INJURY from pinching, keep hands and fingers away from the joints while assembling the rail.
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
The front rail has a cut out “window” at the door end. The rail tab MUST be on top of the rail when assembled.
1. Remove the straight door arm and hanging bracket packaged inside the front rail and set aside for
Installation Step 5 and 9. NOTE: To prevent INJURY while unpacking the rail carefully remove the straight
door arm stored within the rail section.
2. Align the rail sections on a flat surface as shown and slide the tapered ends into the larger ones. Tabs
along the side will lock into place.
3. Place the motor unit on packing material to protect the cover, and rest the back end of the rail on top. For
convenience, put a support under the front end of the rail.
4. As a temporary stop, insert a screwdriver into the hole in the second rail section from the motor unit, as
shown.
5. Check to be sure there are 4 plastic wear pads inside the inner trolley. If they became loose during
shipping, check all packing material. Snap them back into position as shown.
6. Slide the trolley assembly toward the screwdriver as shown.
7. Slide the rail onto the “U” bracket, until it reaches all the stops on the top and sides of the “U” bracket.
Wear Pads
Front Rail Section
(TO DOOR)
“U” Bracket
(TO MOTOR UNIT)
Trolley
Rail Tab
On Top
Slide to stops
on top and sides
of “U” bracket
Screwdriver

7
Assembly
STEP 2 Fasten the rail to the motor unit
To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the
opener.
1. Insert a 1/4"-20 x 1-3/4" bolt into the cover protection bolt hole on the back end of the rail as shown. Tighten
securely with a 1/4"-20 lock nut. DO NOT overtighten.
2. Remove the bolts from the top of the motor unit.
3. Use the carton to support the front end of the rail.
4. Place the “U” bracket, flat side down onto the motor unit and align the bracket holes with the bolt holes.
5. Fasten the “U” bracket with the previously removed bolts; DO NOT use any power tools. The use of power
tools may permanently damage the garage door opener.
6. Attach chain spreader to the motor unit with two screws.
Bolt
1/4"-20x1-3/4"
Lock Nut
1/4"-20
HARDWARE
“U” Bracket
Hex Screws
8-32x7/16”
Cover
Protection
Bolt Hole
Bolt
1/4"-20 x 1-3/4"
Lock Nut
1/4"-20
Bolts (Mounted in the
garage door opener) Chain
Spreader

8
Assembly
STEP 3 Install the idler pulley
1. Lay the chain/cable beside the rail, as shown. Grasp the end of the cable and pass approximately 12" (30
cm) of cable through the window. Allow it to hang until Assembly Step4.
2. Remove the tape from the idler pulley. The inside center should be pre-greased. If dry, regrease to ensure
proper operation.
3. Place the idler pulley into the window as shown.
4. Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock washer and nut
underneath the rail until the lock washer is compressed.
5. Rotate the pulley to be sure it spins freely.
6. Locate the rail tab. The rail tab is near the idler pulley on the front rail section. Use a flat head screwdriver
and lift the rail tab until the tab is vertical (90º).
Rail
Idler Pulley
Grease Inside Pulley
Bolt
Chain/cable
Lock Washer
Nut
Bolt Nut 3/8" Lock Washer 3/8"
HARDWARE
Rail Tab

9
Assembly
STEP 4 Install the chain
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
lALWAYS keep hand clear of sprocket while operating opener.
lSecurely attach sprocket cover BEFORE operating.
1. Pull the cable around the idler pulley and toward the trolley.
2. Connect the cable to the retaining slot on the trolley, as shown. (Figure 1)
a. Push pins of master link bar through cable link and trolley slot.
b. Push master link cap over pins and past pin notches.
c. Slide the closed end of the clip-on spring over one of the pins. Push the open end of the clip-on
spring onto the other pin.
3. With the trolley against the screwdriver, dispense the remainder of the cable/chain along the rail toward the
motor unit around the sprocket and continuing to the trolley assembly. The sprocket teeth must engage the
chain. (Figure 2)
4. Check to make sure the chain is not twisted, then connect it to the threaded shaft with the remaining master
link.
5. Thread the inner nut and lock washer onto the trolley threaded shaft.
6. Insert the trolley threaded shaft through the hole in the trolley. Be sure the chain is not twisted. (Figure 3)
7. Loosely thread the outer nut onto the trolley threaded shaft.
8. Remove the screwdriver.
HARDWARE
Master
Link
Threaded Shaft
Figure 3
Threaded
Shaft
Outer
Nut
Inner
Nut
Lock
Washer
Master Link
Master
Link
Figure 2
Sprocket
Figure 1
a.
b.
c.

10
Assembly
STEP 5 Tighten the chain
1. Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley.
2. To tighten the chain, turn the outer nut in the direction shown.
3. When the chain is approximately 1/4" (6 mm) above the base of the rail at it's midpoint, retighten the inner
nut to secure the adjustment.
Sprocket noise can result if the chain is too loose. When installation is complete, you may notice some chain droop
with the door closed. This is normal. If the chain returns to the position shown when the door is open, do not re-adjust
the chain.
NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect the trolley before
adjusting the chain.
You have now finished assembling your garage door opener. Please read the following warnings before
proceeding to the installation section.
Outer
Nut
Lock
Washer
Trolley
Threaded
Shaft
Inner Nut
To Tighten
Inner Nut
To Tighten
Outer Nut
Mid length of RailBase of Rail
Chain
1/4" (6 mm)

11
Installation
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.
2. Install garage door opener ONLY on properly balanced and lubricated garage door. An improperly balanced
door may NOT reverse when required and could result in SEVERE INJURY or DEATH.
3. ALL repairs to cables, spring assemblies and other hardware MUST be made by a trained door systems
technician BEFORE installing opener.
4. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to avoid
entanglement.
5. Where possible, install the door opener 7 feet (2.13 m) or more above the floor.
6. Mount the emergency release within reach, but at least 6 feet (1.83 m) above the floor and avoiding contact
with vehicles to avoid accidental release.
7. NEVER connect garage door opener to power source until instructed to do so.
8. NEVER wear watches, rings or loose clothing while installing or servicing opener. They could be caught in
garage door or opener mechanisms.
9. Install wall-mounted garage door control:
lwithin sight of the garage door.
lout of reach of small children at a minimum height of 5feet (1.5m) above floors, landings, steps or any
other adjacent walking surface.
laway from ALL moving parts of the door.
10. Place entrapment warning label on wall next to garage door control in a prominent location.
11. Place emergency release/safety reverse test label in plain view on inside of garage door.
12. Upon completion of installation, test safety reversal system. Door MUST reverse on contact with a 1-1/2"
(3.8cm) high object (or a 2x4 laid flat) on the floor.
13. DO NOT install on a one-piece door if using devices or features providing unattended close. Unattended
devices and features are to be used ONLY with sectional doors.

12
Installation
STEP 1 Determine the header bracket location
To prevent possible SERIOUS INJURY or DEATH:
lHeader bracket MUST be RIGIDLY fastened to structural support on header wall or ceiling, otherwise
garage door might NOT reverse when required. DO NOT install header bracket over drywall.
lConcrete anchors MUST be used if mounting header bracket or 2x4 into masonry.
lNEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL
of which are under EXTREME tension.
lALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An
unbalanced garage door might NOT reverse when required.
Installation procedures vary according to garage door types. Follow the instructions which apply to your door.
1. Close the door and mark the inside vertical centerline of the garage door.
2. Extend the line onto the header wall above the door.You can fasten the header bracket within 4 feet (1.22 m)
of the left or right of the door center only if a torsion spring or center bearing plate is in the way; or you can
attach it to the ceiling (see page 13) when clearance is minimal. (It may be mounted on the wall upside
down if necessary, to gain approximately 1/2" (1 cm). If you need to install the header bracket on a 2x4 (on
wall or ceiling), use lag screws (not provided) to securely fasten the 2x4 to structural supports as shown
here and on page 13.
3. Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header
wall 2" (5 cm) above the high point:
l2" (5 cm) above the high point for sectional door and one-piece door with track.
l8" (20 cm) above the high point for one-piece door without track.
This height will provide travel clearance for the top edge of the door. NOTE: If the total number of inches exceeds the
height available in your garage, use the maximum height possible, or refer to page 13 for ceiling installation.
Header Wall Vertical Centerline of Garage Door
2x4 Structural
Supports
Level
(Optional)
Unfinished
Ceiling
2x4
OPTIONAL CEILING MOUNT
FOR HEADER BRACKET
Sectional door with curved track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door with horizontal track
Header Wall
Track
2" (5 cm)
Highest
Point of
Travel
Door
One-piece door without track:
jamb hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Jamb
Hardware
One-piece door without track:
pivot hardware
Header Wall
8" (20 cm)
Highest
Point of
Travel
Door
Pivot

13
Installation
STEP 2 Install the header bracket
You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions
which will work best for your particular requirements. Do not install the header bracket over drywall. If installing
into masonry, use concrete anchors (not provided).
Lag Screw 5/16"-9x1-5/8"
HARDWARE
OPTION A - WALL INSTALLATION
1. Center the bracket on the vertical centerline with the bottom edge of the bracket on the horizontal line as
shown (with the arrow pointing toward the ceiling).
2. Mark the vertical set of bracket holes. Drill 3/16" pilot holes and fasten the bracket securely to a structural
support with the hardware provided.
OPTION B - CEILING INSTALLATION
1. Extend the vertical centerline onto the ceiling as shown.
2. Center the bracket on the vertical mark, no more than 6" (15 cm) from the wall. Make sure the arrow is
pointing away from the wall. The bracket can be mounted flush against the ceiling when clearance is
minimal.
3. Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a structural support with the
hardware provided.
UP
Wall Mounting
Holes
WALL INSTALLATION
CEILING INSTALLATION
Optional Mounting
Holes
Vertical
Centerline of
Garage Door
Header Wall
Header
Bracket
2x4
Structural
Support
Door
Spring
Garage Door
Highest Point
of Garage
Door Travel
Horizontal
Line
Lag
Screw
UP
Header Wall
Ceiling Mounting
Holes
Finished Ceiling
Vertical
Centerline of
Garage Door
Header
Bracket
6" (15 cm)
Maximum
Door Spring
Garage Door
Lag Screw

14
Installation
STEP 3 Attach the rail to the header bracket
1. Position the opener on the garage floor below the header bracket. Use packing material as a protective
base.
NOTE: If the door spring is in the way, you will need help. Have someone hold the opener securely on a
temporary support to allow the rail to clear the spring.
2. Position the rail bracket against the header bracket.
3. Align the bracket holes and join with a clevis pin as shown.
4. Insert a ring fastener to secure.
HARDWARE
Clevis Pin
5/16"x1-1/2" Ring Fastener
Clevis Pin
Ring Fastener
STEP 4 Position the garage door opener
To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door.
1. Remove the packing material and lift the garage door opener onto a ladder.
2. Fully open the door and place a 2x4 (laid flat) under the rail. For one-piece doors without tracks, lay the
2x4 on it's side.
NOTE: A 2x4 is ideal for setting the distance between the rail and the door. If the ladder is not tall enough you will
need help at this point. If the door hits the trolley when it is raised, pull the trolley release arm down to disconnect the
inner and outer trolley. Slide the outer trolley toward the garage door opener. The trolley can remain disconnected
until instructed.
Connected Disconnected
One-piece door
without tracks
2x4 2x4
All other
door types

15
Installation
STEP 5 Hang the garage door opener
To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural
supports of the garage. Concrete anchors MUST be used if installing ANY brackets into masonry.
Hanging the garage door opener will vary depending on your garage. Below are three example installations. Your
installation may be different. For ALL installations the garage door opener MUST be connected to structural supports.
The instructions illustrate one of the examples below.
1. On finished ceilings, use the lag screws to attach a support bracket (not provided) to the structural
supports before installing the garage door opener.
2. Make sure the garage door opener is aligned with the header bracket. Measure the distance from each side
of the garage door opener to the support bracket.
3. Cut both pieces of the hanging bracket to required lengths.
4. Attach the end of each hanging bracket to the support bracket with appropriate hardware (not provided).
5. Attach the garage door opener to the hanging brackets with the hex bolts, lock washers, and nuts.
6. Remove the 2x4 and manually close the door. If the door hits the rail, raise the header bracket.
Finished Ceiling
Lag Screw
123
Not Provided
Not
Provided
Not Provided
4 5 6
Lag Screw
Finished Ceiling
EXAMPLES
Unfinished Ceiling
HARDWARE
Hex Bolt
5/16"- 18x7/8"
Nut
5/16"-18
Lock Washer
5/16"-18
Lag Screw
5/16"-9x1-5/8"
Hex Bolt
Nut
Lock
Washer

16
Installation
STEP 6 Install the light bulb
To prevent possible OVERHEATING of the endpanel or light socket:
lDO NOT use short neck or specialty light bulbs.
lDO NOT use halogen bulbs. Use ONLY incandescent.
To prevent damage to the opener:
lDO NOT use bulbs larger than 100W.
lONLY use A19 size bulbs.
1. Install a 100 watt maximum light bulb in the socket. Light bulb size should be A19, standard neck only. The
light will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the light
will turn OFF.
2. Insert bottom lens tabs into slots on chassis. Tilt towards chassis to engage top tabs, then drop down gently
into place (see illustration).
3. To remove, depress both top lens tabs. Tilt lens slightly outward and down, then pull out to clear bulb. Use
care to avoid snapping off bottom lens tabs.
NOTE: Use only standard light bulb. The use of short neck or speciality light bulbs may overheat the endpanel or light
socket.
STEP 7 Attach the emergency release rope and handle
To prevent possible SERIOUS INJURY or DEATH from a falling garage door:
lIf possible, use emergency release handle to disengage trolley ONLY when garage door is CLOSED. Weak
or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly.
lNEVER use emergency release handle unless garage doorway is clear of persons and obstructions.
lNEVER use handle to pull door open or closed. If rope knot becomes untied, you could fall.
1. Insert one end of the emergency release rope through the handle. Make sure that “NOTICE” is right side
up. Secure with an overhand knot at least 1" (2.5 cm) from the end of the rope to prevent slipping.
2. Insert the other end of the emergency release rope through the hole in the trolley release arm. Mount the
emergency release within reach, but at least 6 feet (1.83m) above floor, avoiding contact with vehicles to
prevent accidental release and secure with an overhand knot.
NOTE: If it is necessary to cut the emergency release rope, seal the cut end with a match or lighter to prevent
unraveling. Ensure the emergency release rope and handle are above the top of all vehicles to avoid entanglement.

17
Installation
STEP 8 Install the door bracket
Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of
door bracket. Contact the garage door manufacturer or installing dealer for opener reinforcement instructions or
reinforcement kit. Failure to reinforce the top section as required according to the door manufacturer may void the
door warranty.
A horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, aluminum, steel, doors with
glass panel, etc.) (not provided). A horizontal reinforcement brace should be long enough to be secured to two or three
vertical supports. A vertical reinforcement brace should cover the height of the top panel. Contact the garage door
manufacturer or installing dealer for opener reinforcement instructions or reinforcement kit.
NOTE: Many door reinforcement kits provide for direct attachment of the clevis pin and door arm. In this case you will
not need the door bracket; proceed to the next step.
OPTION A - SECTIONAL DOORS
1. Center door bracket on the previously marked vertical centerline used for header bracket installation. Note
correct UP placement, as stamped inside bracket.
2. Position top edge of the bracket 2"-4" (5-10cm) below top edge of the door, OR directly below any support
across top of door.
3. Mark, drill holes and install as follows, depending on your door’s construction.
Metal or light weight doors using vertical angle iron brace in the door panel support and the door bracket:
lDrill 3/16" fastening holes. Secure the door bracket using the two 1/4"-14x5/8" self-threading screws.
(Figure1)
lAlternately, use two 5/16"-18x2" bolts, lock washers and nuts (not provided). (Figure2)
Metal, insulated or light weight factory reinforced doors:
lDrill 3/16" fastening holes. Secure door bracket using self-threading screws. (Figure3)
Wood doors:
lUse top and bottom or side to side door bracket holes. Drill 5/16" holes through door and secure bracket
with 5/16"-18x2" carriage bolts, lock washers and nuts (not provided). (Figure4)
NOTE: The 1/4"-14x5/8" self-threading screws are not intended for use on wood doors.
FIGURE 1
FIGURE 3 FIGURE 4
FIGURE 2
Vertical
Reinforcement
Vertical
Centerline
of Garage Door
UP
Door Bracket
Vertical Reinforcement
Vertical Reinforcement
Horizontal Reinforcement
Vertical Centerline
of Garage Door
Hardware
(not provided)
Door Bracket
UP
Vertical
Centerline
of Garage Door
UP
Vertical Centerline of
Garage Door
Hardware
(not provided)
UP
Inside Edge of Door or
Reinforcement Board
Self-Threading Screw
Self-Threading
Screw
HARDWARE
Self-Threading Screw
1/4"-14x5/8"

18
Installation
STEP 8 Install the door bracket (continued)
OPTION B - ONE-PIECE DOORS
1. Center the door bracket on the top of the door, in line with the header bracket as shown.
2. Mark either the left and right, or the top and bottom holes.
Metal Doors:
lDrill 3/16" pilot holes and fasten the bracket with the self-threading screws provided.
Wood Doors:
lDrill 5/16" holes and use 5/16"-18x2" carriage bolts, lock washers and nuts (not provided) or 5/16"x1-1/2"
lag screws (not provided) depending on your installation needs.
NOTE: The door bracket may be installed on the top edge of the door if required for your installation. (Refer to the
dotted line optional placement drawing.)
For a door with no exposed
framing, or for the optional
installation, use lag screws
5/16"x1-1/2" (not provided)
to fasten the door bracket.
Vertical
Centerline
of Garage
Door
Optional
Placement
of Door
Bracket
Door Bracket
Header Bracket
Header Wall
2x4 Support (Finished Ceiling)
Door
Bracket
Top of Door
(Inside Garage)
Top Edge of
Door
Optional
Placement
Optional
Placement
Top Edge
of Door
Top of Door
(Inside Garage)
Door
Bracket
Hardware
(not provided)
Hardware
(not provided)
Metal Door Wood Door
Self-Threading Screw

19
Installation
STEP 9 Connect the door arm to the trolley
Installation will vary according to the garage door type. Follow the instructions which apply to your door.
OPTION A - SECTIONAL DOORS
IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm.
1. Close the door. Disconnect the trolley by pulling the emergency release handle.
2. Attach the straight door arm to the outer trolley using the clevis pin. Secure with the ring fastener.
3. Attach the curved door arm to the door bracket using the clevis pin. Secure with the ring fastener.
4. Bring arm sections together. Find two pairs of holes that line up and join sections. Select holes as far apart
as possible to increase door arm rigidity and attach using the bolts, nuts, and lock washers.
5. Pull the emergency release handle toward the garage door opener until the trolley release arm is
horizontal. The trolley will re-engage automatically when the garage door opener is activated.
NOTE: If the holes in the curved door arm and the straight door arm do not align, reverse the straight door arm, select
two holes (as far apart as possible) and attach using bolts, nuts, and lock washers. If the straight door arm is hanging
down too far, you may cut 6" (15 cm) from the solid end.
HARDWARE
Hex Bolt 5/16"-18x7/8"
Nut 5/16"-18
Lock Washer
5/16"-18
Clevis Pin 5/16"x1"Clevis Pin 5/16"x1-1/4"
Ring Fastener
Lock Washer
5/16"-18
Nut
5/16"-18
Hex Bolt
5/16"-18x7/8"
Clevis Pin
5/16"x1-1/4"
Ring Fastener
Clevis Pin
5/16"x1"
Straight
Door Arm
(Groove
facing out)
Curved
Door Arm

20
Installation
STEP 9 Connect the door arm to the trolley (continued)
OPTION B - ONE-PIECE DOORS
IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm.
1. Close the door. Disconnect the trolley by pulling the emergency release handle.
2. Fasten the straight door arm and the curved door arm together to the longest possible length (with a 2 or 3
hole overlap) using the bolts, nuts, and lock washers.
3. Attach the straight door arm to the door bracket using the clevis pin. Secure with the ring fastener.
4. Attach the curved door arm to the trolley using the clevis pin. Secure with the ring fastener.
5. Pull the emergency release handle toward the garage door opener until the trolley release arm is
horizontal.
HARDWARE
Hex Bolt 5/16"-18x7/8"
Nut 5/16"-18
Lock Washer
5/16" -18
Clevis Pin 5/16"x1"Clevis Pin 5/16"x1-1/4"
Ring Fastener
One-Piece Door without Track
One-Piece Door with Track
Ring Fastener
Ring Fastener
Ring Fastener
Nut
Nut
Ring Fastener
Lock Washer
Lock Washer
Clevis Pin 5/16"x1-1/4"
Clevis Pin
5/16"x1-1/4"
Hex Bolts
Hex Bolts
Clevis Pin
5/16"x1"
Clevis Pin
5/16"x1"
Straight Door Arm
(Groove facing out)
Curved Door Arm