Sears 39.18205SR - 1/2 HP Owner's Manual page 19

ASSEMBLE DOOR ARM: Fasten straight and
curved door arm sections together to their longest
possible. With door closed, connect straight door arm
section to door bracket with a clevis pin. Secure with
a ring fastener.
Before connecting door arm to trolley, limits of travel must be adjusted on one-piece doors. Limit adjustment
screws are located on left side panel as shown in illustration on page 20. Follow procedures below.
Door Arm
Bracket
Closed
OPEN DOOR ADJUSTMENT
Decrease UP limit. Turn UP limit adjustment screw
counterclockwise 4 complete turns.
Press Wall Push Button. Trolley will travel to full open
position.
Manually raise door arm to open position (parallel to
floor) and lift door arm to trolley. The arm should
touch trolley just in back of door arm connector hole
as shown in solid line drawing. If arm does not
extend far enough, adjust limit further. One full turn
equals 2" of door travel.
CONNECT DOOR ARM TO TROLLEY:
remaining clevis pin. Secure with ring fastener. NOTE: It may be necessary to lift door slightly to make
connection.
Run opener through a complete travel cycle. If door has a slight 'backward' slant in full open position, decrease
UP limits until door is parallel to floor.
ALL ONE-PIECE DOORS
Fully Closed
Door Arm
Open Door
Door
ADJUSTMENT PROCEDURES
Door
Bracket
Clevis Pin
Trolley
Door Arm
Connector Hole
Door Arm Bracket
Decrease DOWN limit. Turn DOWN limit adjustment
screw clockwise 8 complete turns.
Press Wall Push Button. Trolley will travel to full
closed position.
Manually close door and lift door arm to trolley. The
arm should touch trolley just ahead of door arm
connector hole as shown in dotted line drawing. If
arm is behind the connector hole, adjust limit further.
One full turn equals 2" of door travel.
With door closed, join curved arm to connector hole in trolley with
19
Ring
Lock
Fastener
Washers
5/16"
Straight
Door Arm
Screws
5/16"-18x7/8"
Fully Open
Trolley
Door Arm
Connector Hole
Door Arm
CLOSED DOOR ADJUSTMENT
Nuts
5/16"-18
Curved
Door Arm