Craftsman 139.53978SRT owner manual How and When to Adjust the Forces

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Adjustment Step 2

I

Adjust the Force

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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.

Adjustment Label

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 it. 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.

Back panelof

doorop_n6r

Force

Adjustment

Control

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 two-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.

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 stleast5 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'tflashing

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 turning the control counterclockwise.

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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Contents Garage Door Opener Instructions. Read the instructions carefully Start by reviewing these important safety alert symbolsYoull Need Tools Closed Position SafetyBased on your particular requirements, there are Closed Position One-Piece Door with TrackOne-Piece Door without Track Section Carton Inventory@ @ Safety Reversing SensorAssembly Step Assembly Section Pages 8Hardware Shown Actual Size Install the Idler PulleyFasten the Rail to the Opener Master Link Clip-OnSpdng Unk Cap Install the Chain/Cable Attach the Sprocket Cover= Lo Tro,.y Tighten ChainProceed to , Installation Section Pages 12 Installation StepDetermine Header Bracket Location Example One-piece door without track Jamb hardwareCeiling Header Bracket Installation Install the Header BracketWall Header Bracket Installation Insert a ring fastener to secure Attach the Rail to the Header BracketWith the door fully open and parallel to the floor Position the OpenerHang the Opener Installation StepSlide down to secure. Adjust screw for snug fit Install the Door ControlSerious injury or death Shown Actual Size UihJIlnJIlilililil IlilnInstall the light Install the Light and the LensInstall the lens Attach the Emergency Release Rope and HandleRightWrong Permanent Widng ConnectionsElectrical Requirements Important Information about Safety Reversing Sensor Safety Reversing SystemInstalling the Brackets Sensor Safety ReversingBe sure power to the opener is disconnected Garage door track installation preferredTrouble Shooting the Safety Sensors Mounting and Wiring the Safety SensorsAligning the Safety Sensors Fasten Door Bracket IIIIIlllillllILllllllllllllllllNut IIIIIII11111111LLLIIIIIlIAbove holes Connect Door Arm to TrolleyRBok Adjustment Procedures for One-Piece Doors How and When to Adjust the Limits Adjustment Section Pages 28 Adjustment StepAdjust the UP and Down Limits Adjustment Step If the door does not close completelyHow and When to Adjust the Forces Adjust the ForceTest the Safety Reverse System Test The Safety Reversing SensorImportant safety check Press the remote control push button to open the doorSchedule MaintenanceTo reduce the risk of severe injury or death to persons Manual disconnect Position Operation of Your OpenerOperation of the Door Control see If you have a Premium Control Console Receiver and Remote Control ProgrammingIf you do not have a Premium Control Console SECURITY,ISituation Probable Cause and Solution Having a Problem?Door opens but Situation Probable Cause SolutionOpener lights blink for 5 seconds Doesnt turn offInstallation Parts Repair PartsRail Assembly Parts Br co.tact ASSEMe,v Opener Assembly PartsOnly through Sears Parts & Service AccessoriesFor Sectional Doors Onl With the door closedIndex Para ordenar piezas con entrega a domicilio For in-homemajor brand repair serviceSears Warranty

139.53978SRT specifications

The Craftsman 139.53978SRT is an advanced garage door opener that combines reliability, performance, and ease of use. Designed to cater to the needs of modern homeowners, this model stands out with its robust features and technological innovations.

One of the key highlights of the Craftsman 139.53978SRT is its powerful motor, delivering a peak horsepower equivalent to ensure smooth and efficient operation. This allows it to effortlessly lift even the heaviest of garage doors, making it suitable for various types of residential garage doors. The quiet operation of this opener is another major advantage, allowing for a peaceful environment in and around the garage.

Another notable feature is the smart technology integration. The Craftsman 139.53978SRT is compatible with a range of smart home systems, allowing users to control their garage door remotely via a smartphone app. This feature not only adds convenience but also enhances security, as users can receive alerts and notifications about the status of their garage door, ensuring peace of mind.

Security is a priority with this model, which comes equipped with rolling code technology. This mechanism generates a new code each time the remote is used, preventing unauthorized access and ensuring that your garage remains secure from intruders. Additionally, the enhanced safety features include safety sensors that detect obstacles, automatically reversing the door's movement if something is detected, thereby preventing accidents.

Installation and setup are straightforward, thanks to the user-friendly design of the Craftsman 139.53978SRT. The unit includes detailed instructions and all necessary hardware for installation. Many users can set it up within a few hours without the need for professional assistance.

With a durable construction, the Craftsman 139.53978SRT is built to last. It has a sleek design that complements various home aesthetics while withstanding wear and tear from daily use. Maintenance is minimal, with easy access to essential components for servicing.

In summary, the Craftsman 139.53978SRT offers a perfect blend of power, technology, and security features. Its user-friendly design, combined with smart technology compatibility and robust safety measures, makes it an ideal choice for homeowners seeking a reliable garage door opener. Whether you’re looking to upgrade an old system or install a new one, this model is sure to meet your requirements and enhance the functionality of your garage.
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