Attach The T-Rail To Header Bracket - Chamberlain 1280 Owner's Manual

Installation Step 3
Attach the T-rail to the Header Bracket
Header Wall
Header
Bracket
Belt Pulley
Bracket
Garage
Door
T-rail
Hardware Shown Actual Size
Clevis Pin
5/16" x 2-3/4"
• Position the opener on the garage floor below the
The Chamberlain Group, Inc.
header bracket. Use packing material as a
Liftmaster Synchro Drive
protective base.
Attach Tee Rail to Header Brack
If the door spring is in the way you'll need help.
Have someone hold the opener securely on a
5/16/92
temporary support to allow the T-rail to clear the
spring.
• Position the belt pulley bracket against the header
bracket.
• Align the bracket holes and join with a clevis pin as
shown.
• Insert a ring fastener to secure.
Header Bracket
Clevis Pin
5/16"x2-3/4 "
Belt Pulley
Bracket
11
Ring Fastener
T-rail
Temporary
Support
Ring Fastener