Chamberlain 2000SDR 1/2 HP - Manual (Page 11)

Header Bracket
Rail Bracket
Foam Packaging
Opener Carton or
Temporary
Support
Header Wall
Garage
Door
Rail
Clevis Pin
5/16" x 2-3/4" Ring Fastener
Clevis Pin
5/16"x2-3/4 "
Ring Fastener
Header Bracket
Rail
Bracket
Rail
• 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 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.
11
Installation Step 3
Attach the Rail to the Header Bracket
Hardware Shown Actual Size