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Liftmaster 2000SDR Manual

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ASSEMBLY STEP 3
Attach the Rail Brackets
7
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of severe injury or death to persons:
1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS
2. Install only on a properly balanced and lubricated garage door. An improperly balanced door may not
reverse and could result in severe injury or death. Repairs to cables, spring assemblies and other
hardware must be made by a professional service person before installing opener.
3. Disable all locks and remove all ropes connected to the garage door before installing the opener. Ropes
connected to a garage door can cause entanglement and death.
4. If possible, install door opener 7 feet or more above floor with the manual release handle mounted 6
feet above the floor.
5. Do not connect the opener to power source until instructed to do so.
6. Locate the Door Control within sight of the door at a minimum height of 5 feet where small children
cannot reach and away from all moving parts of the door.
7. Install the User Safety Instruction Label on the wall adjacent to the control button and the
Maintenance Instruction Label in a prominent location on the inside of the garage door.
8. Upon completion of the installation, the door must reverse when it comes in contact with a one-inch
high object or a 2x4 laid flat on the floor.
9. Do not wear watches, rings or loose clothing while installing or servicing an opener. Jewelry or loose
clothing can be caught in the mechanism of the garage door or the opener.
• Align rail brackets to end of rail assembly, as shown.
• Insert two 1/4"-20 x 5/8" hex screws and lock nuts.
Tighten securely with a 7/16" socket.
Rail
Brackets
Rail
1/4"-20
Lock Nuts
1/4"-20x5/8
Hex
Screws
WARNING
WARNING
You have now finished assembling your garage door opener. Please read the following warnings
before proceeding to the installation section:
1/4" - 20
Lock Nut
1/4" - 20 x 5/8"
Hex Screw
Hardware Shown Actual Size
… 7 …


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