Chamberlain 547445 - Manuel (Page 14)

14
INSTALLATION STEP 3
Attach the Rail to the Header Bracket
1. Position the opener on the garage fl oor below the
header bracket. Use packing material as a protective
base. NOTE: If the door spring is in the way, you will
need help. Have someone hold the opener securely on a
temporary support to allow the rail to clear the spring.
2. Position the rail bracket against the header bracket.
3. Align the bracket holes and join with a clevis pin
as shown.
4. Insert a ring fastener to secure.
HARDWARE SHOWN ACTUAL SIZE
Clevis Pin 5/16"x1-1/2" Ring Fastener
Temporary
Support
Header Bracket
Idler Pulley
Header Wall
Header
Bracket
Mounting
Hole
Garage
Door