Craftsman 1/2HP Garage Door Opener 139.53515SR - Manual (Page 16)

Installation
CTpp -in
Connect Door Arm to Trolley
^ Follow only those instructions which apply to your door type.
SECTIONAL DOOR INSTALLATION
Make sure garage door is closed tight. Pull the emergency release handle to disconnect the trolley. Manually move
outer trolley back to the center of inner trolley as shown in Figures A, B and C.
FIG A: Fasten straight door arm section
to outer trolley with a clevis pin. Secure
the connection wittra ring fastener.
Fasten curved section to door bracket in
the same way.
FIG B: Bring arm sections together. Find
two pairs of holes that line up and join
sections.
Select holes as far ^art as possible to
increase door arm rigidity.
Clevis Pin
FIG C: If holes in curved arm are ABOVE
holes in straight arm, disconnect straight
arm. Cut about 6* from the solid end.
Reconnect to trolley with CUT END
DOWN as shown.
Bring arm sections together. Find two
pairs of holes that line up and join with
screws, lock washers and nuts.
Emergency
Release
Handle
Screws
Sri6"-t8x7/8"
V
Screws
^ 5n6*-18x7/8"
-Cut This End
Proceed to Step 1, page 17. Trolley will rc'engage automatically when opener is operated.
ONE-PIECE DOOR INSTALLATION
ASSEMBLE DOOR ARM: Fasten straight and curved door
arm sections together to longest possible length. With door
closed, connect straight door arm section to door bracket
with a clevis pin. Secure with a ring fastener
Door
Bracket'
.fling
Fastener Nuts
sne’-is
Clevis Pin Straight '
Arm
Screws
5ri8'-18x7/8 -----
Curved
Door Arm
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 17. Follow procedures below.
OPEN DOOR ADJUSTMENT
Decrease UP limit. Turn UP limit adjustment screw counterclock­
wise 4 complete turns.
Press Wall Control push button. Trolley will travel to full open.
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
ADJUSTMENT PROCEDURES
CLOSED DOOR ADJUSTMENT
Decrease DOWN limit. Turn DOWN limit adjusinnent screw clock­
wise 8 complete turns.
Press Wall Control push button. Trolley will travel to full dosed.
Manually close door artd 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.
equals 2' of door travel.
CONNECT DOOR ARM TO TROLLEY: With door closed, join curved arm to connector hole in trolley with remaining clevis pin. Secure
with a 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 'downward* slant in full open position, decrease UP limits until door
is parallel to floor.
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