Chamberlain CSO 1/2HP - Manual (Page 13)

Header
Bracket
Chain
Pulley
Bracket
Temporary
Support
Header Wall
Garage
Door
Rail
INCREASE
DOWN
TRAVEL
UP
Clevis Pin
5/16"x2-3/4 "
Ring Fastener
Header Bracket
Chain
Pulley
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 chain pulley bracket against the header
bracket.
• Align the bracket holes and join with a clevis pin as
shown.
• Insert a ring fastener to secure.
13
Installation Step 3
Attach the Rail to the Header Bracket
Clevis Pin
5/16" x 2-3/4" Ring Fastener
Hardware Shown Actual Size