Craftsman 139.53939D Owner's Manual page 26

ALL0NE-PIECEDOORS
1. Assemblethe DoorArm:
IMPORTANT:Thegroove on the straight door arm MUST face
away from the curved door arm (Figure 5).
• Fastenthe straight and curved door arm sections together to
the longest possible length (with a 2 or 3 hole overlap).
• Make sure the garage door is fully closed. Connect the straight
door arm section to the door bracket with the 5/16"x1-1/4"
clevis pin.
• Secure with a ring fastener.
• Pull the emergency release handle, disconnecting the outer
trolley from the inner trolley by pulling straight down on the
emergency releasehandle and sliding the outer trolley back
toward the motor unit.
• Connect the curved door arm section to the trolley using the
5/16"x1-1/4" clevis pin and ring fastener.
NOTE:Adjusting the limits on the foflowing page:
• The trolley will automatically connect. If not, review the trolley
lockout feature on page 32.
• When setting the up limit on the foflowing page, the door
should not have a "backward" slant when fully open as
illustrated below. A slight backward slant will cause
unnecessarybucking and/or jerking operation as the door is
being opened or closed from the fully open position.
Figure 5
Groove
Facing
Out
Door
CORRECT INCORRECT
Door Arm
Figure6
Inner Trolley
Inner Trolley
Open Door
(Incorrect)
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