Attach The T-Rail To Header Bracket; Position The Opener - Craftsman 139.53664SRT Owner's Manual

Installation Step 3
Attach the T-rail to the Header Bracket
• 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 T-rail to clear the
spring.
• Position the belt pulley 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
15