Craftsman 139.53978SRT owner manual Fasten the Rail to the Opener, Install the Idler Pulley

Page 9

Assembly Step 2

I

Fasten the Rail to the Opener

I

 

•Insert a 1/4"-20xl -3/4bolt into the cover protection bolt hole on the back end of the rail as shown. Tighten securely with a 1/4"-20 lock nut.

•Remove the two screws from the top of the opener.

•Place the U bracket, flat side down, on the opener and align the bracket holes with the screw holes.

Fasten with the previously removed screws.

•Attach spreaders to the U bracket by snapping them into place.

•Align the rail assembly with the top of the opener. Slide the rail end onto the U-bracket, all the way

to the stops that protrude on the top and sides of the bracket.

Hardware Shown Actual Size

Bolt 1/4"-20x 1-3/4

1/4"-20

To fasten rail, use only those screws mounted in the top of the opener. Any other screws will cause serious damage to the opener.

Screws •

Opener

 

Sprocket

"U" Bracket

Cover

So_ Ho_

SLIDE RAILTO STOP_

into Back Slets.

then Snap Tab

ON TOP AND SIDES

OF BRACKET

Into Front Slot

 

Lock Nut

 

Assembly Step 3

Install the Idler Pulley

Chain and

Cabte

•Lay the chain/cable beside the rail, as shown. Grasp the end with the cable loop and pass approximately 12" of cable through the window. Allow it to hang until Assembly Step 5.

•Remove the tape from the idler pulley. The inside center should be pre-greased. If dry, regrease to ensure proper operation.

•Place the idler pulley into the window as shown.

•Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock washer and nut underneath the rail until the lock washer is

compressed.

Rotate the pulley to be sure it spins freely. Insert a 1/4"-20xl-3/4 bolt into the trolley stop hole in the front of the rail as shown. Tighten securely with a 1/4"-20 lock nut.

Hardware Shown Actual Size

Trolley

rease

Inside Pulley

Idler

Stop Hole

'

Pulley

Idler Pulley

_

Idler Bolt

Bolt 1/4'-20x1-3/4

Lock Nut 1/4"-20

Nut 3/8'

Lock Washer 318"

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Contents Garage Door Opener Instructions. Read the instructions carefully Start by reviewing these important safety alert symbolsYoull Need Tools Safety Based on your particular requirements, there areClosed Position One-Piece Door with Track One-Piece Door without TrackClosed Position Section Carton Inventory@ @ Safety Reversing SensorAssembly Step Assembly Section Pages 8Install the Idler Pulley Fasten the Rail to the OpenerHardware Shown Actual Size Master Link Clip-OnSpdng Unk Cap Install the Chain/Cable Attach the Sprocket Cover= Lo Tro,.y Tighten ChainInstallation Section Pages 12 Installation Step Determine Header Bracket LocationProceed to , Example One-piece door without track Jamb hardwareInstall the Header Bracket Wall Header Bracket InstallationCeiling 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 HandlePermanent Widng Connections Electrical RequirementsRightWrong 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 preferredMounting and Wiring the Safety Sensors Aligning the Safety SensorsTrouble Shooting the Safety Sensors Fasten Door Bracket IIIIIlllillllILllllllllllllllllNut IIIIIII11111111LLLIIIIIlIConnect Door Arm to Trolley RBokAbove holes 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 doorMaintenance To reduce the risk of severe injury or death to personsSchedule Operation of Your Opener Operation of the Door Control seeManual disconnect Position 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 offRepair Parts Rail Assembly PartsInstallation Parts Br co.tact ASSEMe,v Opener Assembly PartsOnly through Sears Parts & Service AccessoriesFor Sectional Doors Onl With the door closedIndex For in-homemajor brand repair service Sears WarrantyPara ordenar piezas con entrega a domicilio

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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