Attach The Rail To The Header Bracket - Chamberlain LiftMaster Security+ 311 Owner's Manual

Header Wall
Header Bracket
Idler Pulley Bracket
Garage
Door
HARDWARE SHOWN ACTUAL SIZE
Clevis Pin
5/16"x2-3/4"
INSTALLATION STEP 3
Attach the Rail to the Header
Bracket
• Position the opener on the garage floor below the
header bracket. Use packing material as a
protective base. NOTE: 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 rail to clear the spring.
• Position the rail 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"
Ring Fastener
15
Ring Fastener
Idler
Pulley
Bracket
Rail