Installation step 3 – Craftsman 1/2 HP GARAGE DOOR OPENER 139.53978SRT User Manual
Page 15
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Installation Step 3
Attach the Rail to the Header Bracket
Header Wall
Header Bracket
NOTE: (Optional) W ith an existing Craftsm an
installation, you m ay re-use the old header bracket
with the two plastic spacers included in the hardware
bag. Place the spacers inside the bracket on each
side of the rail, as illustrated.
• Position the opener on the garage floor below the
header bracket. Use packing materia! as a
protective base.
if the door spring is in the way you'li need help.
Have someone hold the opener securely on a
temporary support to allow the rail to clear the
spring.
• Position the front rail end within the header bracket
and join with a 5/16"x1-1/2" clevis pin as shown.
• Insert a ring fastener to secure.
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OPTION WITH
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INSTALLATION
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Hardware Shown Actual Size
Clevis Pin 5/16'x1-1/2"
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Ring fastener
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