3. Connectthe Door Arm To The Trolley - Craftsman 139.53903DM Owner's Manual

ALLONE-PIECEDOORS
1. Assemblethe door arm, Figure 4:
• Fastenthe straight and curved door arm sections together to
the longest possible length (with a 2 or 3 hole overlap).
• With the door closed, connect the straight door arm section
to the door bracket with the 5/16"x1-1/4" clevis pin.
• Securewith a ring fastener.
2. Adjustmentprocedures,Figure 5:
• On one-piece doors, before connecting the door arm to the
trolley, the travel limits must be adjusted. Limit adjustment
screws are located on the left side panel as shown on page
27. Follow adjustment procedures below.
• Open door adjustment:decrease UP travel limit
- Turn the UP limit adjustment screw counter-clockwise
4 turns.
- Press the Door Control push button. The trolley will travel to
the fully open position.
- Manually raise the door to the open position (parallel to the
floor), and lift the door arm to the trolley. The arm should
touch the trolley just in back of the door arm connector
hole. Refer to the fully open trolley/door arm positions in the
illustration. If the arm does not extend far enough, adjust
the limit further. One full turn equals 2-1/2" (6.4 cm) of
trolley travel.
• Closeddoor adjustment:decrease DOWNtravel limit
- Turn the DOWNlimit adjustment screw clockwise
4 complete turns.
Door
Bracket _ _ ,,,_...,,._ j_ Ring
_"__.__ _'_ Fastener
_- _ _-_._"___1 N uts
|_ __--_ Lock 5/16"-18
__ _4,.__ Washers I _'_
I _ _.__--_ 5/16" I I _ _1
ClevisPin
Straight / be I I /I
Bolts 1:_;_ /
5/_'6_.18x7/8 ,, _ "__qCurved
Figure 4
Door Arm
Press the Door Control push button. The trolley will travel to
the fully closed position.
- Manually close the door and lift the door arm to the trolley.
The arm should touch the trolley just ahead of the door arm
connector hole. Refer to the fully closed trolley/door arm
positions in the illustration. If the arm is behind the
connector hole, adjust the limit further. One full turn equals
2-1/2" (6.4 cm) of trolley travel.
3. Connectthe door arm to the trolley:
• Close the door and join the curved arm to the connector hole
in the trolley with the remaining clevis pin. It may be
necessary to lift the door slightly to make the connection.
• Securewith a ring fastener.
• Run the opener through a complete travel cycle. If the door
has a slight "backward" slant in full open position as shown in
the illustration, decrease the UP limit until the door is parallel
to the floor.
NOTE: Whensetting the up limit on the following page, the door
should not havea "backward" slant when fully open as illustrated
below. A slight backward slant will cause unnecessary bucking
and/or jerking operation as the door is being opened or closed
from the fully open position.
Figure5
Inner Trolley
Inner Trolley
Outer Trolley
Open Door
(Incorrect)
26