Chamberlain PD432D 1/2 HP User Manual

14

• 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 header/rail bracket against the header

bracket.

• Align the bracket holes and join with a clevis pin

5/16"x2-3/4" as shown. Spacer can be installed on
either side of rail.

• Insert a ring fastener to secure.

Header Bracket 

Header/Rail Bracket

Opener Carton or 
Temporary 
Support 

 

Header Wall 

Garage 
Door 

Rail 

Clevis Pin 
5/16"x2-3/4" 

Ring Fastener 

Spacer

Header Bracket 

Header/Rail
Bracket

Rail 

Clevis Pin
5/16"x2-3/4"

Ring Fastener

Spacer