Additional items you may need, Tools needed, Preparation – Chamberlain 248730 User Manual
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Additional Items You May Need:
Survey your garage area to see if you will need any of the following items:
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(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.
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SUPPORT BRACKET AND FASTENING HARDWARE
Must be used if you have a finished ceiling in your garage.
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EXTENSION BRACKETS (MODEL 41A5281) OR WOOD BLOCKS
Depending upon garage construction, extension brackets or wood blocks may be needed to
install the safety reversing sensor.
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FASTENING HARDWARE
Alternate floor mounting of the safety reversing sensor will require hardware not provided.
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OUTSIDE QUICK RELEASE (MODEL 7702CB)
Required for a garage with NO access door.
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DOOR REINFORCEMENT
Required if you have a lightweight steel, aluminum, fiberglass or glass panel door.
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RAIL EXTENSION KIT
Required if your garage door is more than 7 feet (2.13 m) high.
Tools Needed
2
1
3/16
7/16
1/2
5/32
5/16
5/8
9/16
1/4
7/16
Preparation