Craftsman 139.53677SRT1, 139.53671SRT1 Adjustment Step, How and When to Adjust the Forces

Models: 139.53674SRT 139.53677SRT1 139.53661SRT1 139.53671SRT1

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Adjustment Step 2

Adjustment Step 2

Adjust the Force

Force adjustment controls are located on the back _anel of the opener. Force adjustment settings regulate the amount of power required to open and close the door.

The door will stop in the up direction if anything interferes with its travel The door will reverse in the down direction if anything interferes with its travel (including binding or unbalanced doors).

If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. Weather conditions can affect the door movement, so occasional adjustment may be needed.

The maximum force adjustment range is 260 degrees, about 3/4 of a complete turn. Do not force controls

beyond that point. Turn force adjustment controls with a screwdriver.

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WARNING

I

Too much force on the door will interfere with

the proper operation of the safety reverse system. The door might not reverse properly

when required and could seriously injure or kill someone under iL Do not increase the force

beyond the minimum amount required to close the door. Do not use the force adjustments to

compensate for a binding or sticking garage door. Test the safety reverse system following all adjustments to force levels. See page 30.

Backpanel of

dooropener "Force

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How and When to Adjust the Forces

Test the DOWN (close) force

Grasp the door bottom when the door is about halfway through DOWN (close) travel. The door should reverse. Reversal halfway through down travel does not guarantee reversal on a one-inch obstruction. See page 30. If the door is hard to hold or doesn'treverse, decrease the DOWN (close) force by turning the control counterclockwise.

Make 10 degree turn adjustments until the door reverses normally. After each adjustment, run the opener through a complete cycle.

Test the UP (open) force

Grasp the door bottom when the door is about halfway through UP (open) travel. The door should stop. If the door is hard to hold or doesn'tstop,

decrease UP (open) force by tuming the control counterclockwise.

Make 10 degree turn adjustments until the door stops easily. After each adjustment, run the opener through a complete travel cycle.

If the door doesn't open at least 5 feet

Increase UP (Open) force by turning the control clockwise. Make 10 degree turn adjustments until door opens completely. Re-adjust the UP limit if necessary. After each adjustment, run the opener through a complete travel cycle.

If the door reverses during the down (close) cycle and the opener lights aren't flashing

Increase DOWN (close) force by turning the control clockwise. Make 10 degree turn adjustments until the door completes a close cycle. After each adjustment, run the opener through a complete travel cycle. Do not increase the force beyond the minimum amount required to close the door.

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Craftsman 139.53677SRT1, 139.53671SRT1, 139.53674SRT, 139.53661SRT1 Adjustment Step, How and When to Adjust the Forces