Header
Bracket
Belt Pulley
Bracket
Temporary
Support
Header Wall
Garage
Door
,
Liftmaster Synchro Drive
Tee Rail to Header Bracket
5/16/92
T-rail
Clevis Pin
5/16"x2-3/4 "
Ring Fastener
Header Bracket
Belt Pulley
Bracket
T-rail
INCREASE
DOWN
TRAVEL
INCREASE
UP
TRAVEL
• Position the opener on the garage floor below the
header bracket. Use packing material as a
protective base.
If the door spring is in the way you'll need help.
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.
15
Installation Step 3
Attach the T-rail to the Header Bracket
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Hardware Shown Actual Size