Assemble the Door Arm:

 

• Fasten the straight and curved door arm sections

Door

together to the longest possible length (with a 2 or

 

Ring

Lock

Nuts

3 hole overlap).

With the door closed, connect the straight door arm

section

to the door bracket with the 5/16"x1-1/4"

Cle_i,Pin

clevis pin.

sit6.xt.t/4"

• Secure

with a ring fastener.

 

Washers 5/16"-18

5/16"

Straight

Arm

Curved

Door Arm

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 28. Follow adjustment procedures below.

Fully Closed

Trolley

Fully Open

Trolley

Door Arm

Door Arm

Door Arm

Connector Hole

m

I

,...........

JL_

Closed

 

 

 

Door Arm

I

Door

Open Door

Door

with

 

 

 

Backward

Slant

 

I

 

 

 

Adjustment Procedures for One-PieceDoors

Open Door Adjustment:

Decrease UP limit

Turn the UP limit adjustment screw counter- clockwise 5-1/2 turns.

Press the Door Control push bar or 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" of trolley travel.

Closed Door Adjustment:

Decrease DOWN limit

Turn the DOWN limit adjustment screw clockwise 5 complete turns.

Press the Door Control push bar or 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" of trolley travel.

Connect the 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.

Secure with 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.

27

Page 27
Image 27
Craftsman 139.53645SRT3, 139.53834SRT3, 139.53646SRT2 Adjustment Procedures for One-PieceDoors, Assemble the Door Arm

139.53648SRT2, 139.53645SRT3, 139.53834SRT3, 139.53335SRT3, 139.53646SRT2 specifications

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