Chamberlain 2500B - Manual (Page 11)

Header Bracket
Belt Pulley Bracket
Opener Carton or
Temporary
Support
Header Wall
Garage
Door
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Torsion
Spring
Rail
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Header Bracket
Belt Pulley
Bracket
Foam Packaging
Rail
11
HARDWARE SHOWN ACTUAL SIZE
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.