LiftMaster 3255 3255 Manual - Page 10

Installation Step 3

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Header Wall Header Bracket Chain Pulley Bracket 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. Garage Door Ring Fastener Rail Header Bracket Clevis Pin 5/16"x2-3/4" Chain Pulley Bracket Rail Temporary Support HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" 10 Ring Fastener

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10
Clevis Pin
5/16"x2-3/4"
Ring Fastener
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.
HARDWARE SHOWN ACTUAL SIZE
Header Bracket
Chain Pulley
Bracket
Temporary
Support
Header Wall
Garage
Door
Rail
Clevis Pin
5/16"x2-3/4"
Ring Fastener
Header Bracket
Chain
Pulley
Bracket
Rail