Attach The T-Rail To Header Bracket - Chamberlain 1280-298LMC - 1/2 HP Owner's Manual

Installation Step 3
Attach the T-rail to the Header Bracket
Header Wall
Header
Bracket
Belt Pulley
Garage
Door
Bracket
T-rail
Hardware Shown Actual Size
Clevis Pin
5/16"x2-3/4"
• Position the opener on the garage floor below the
Liftmaster Synchro Drive
header bracket. Use packing material as a
protective base.
Tee Rail to Header Bracket
If the door spring is in the way you'll need help.
5/16/92
Have someone hold the opener securely on a
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
Ring Fastener
11
Ring Fastener
Bracket
T-rail
Temporary
Support
,