Craftsman 139.53978SRT owner manual Install the Chain/Cable Attach the Sprocket Cover

Page 10

Assembly Step 4

Install the Chain/Cable

and Attach the Sprocket Cover

1.Pull the cable around the idler pulley and toward the trolley.

2.Connect the cable loop to the retaining slot on the trolley, as shown:

•From below, push pins of master link bar up through cable loop and trolley slot.

•Push master link cap over pins and past pin notches.

•Slide clip-on spring over cap and onto pin notches until both pins are securely locked in place.

3.With the trolley against the pliers, dispense the remainder of the cable/chain along the rail toward the powerhead and around the sprocket. The sprocket teeth must engage the chain.

4.Check to make sure the chain is not twisted, then connect it to the threaded shaft with the remaining master link.

5.Thread the inner nut and lock washer onto the the trolley shaft.

6.Insert the trolley threaded shaft through the hole in the trolley. Be sure the chain is not twisted.

7.Loosely thread the outer nut onto the trolley shaft.

8.Remove the locking pliers.

9.Align the tabs on the sprocket cover with the slots

in the mounting plate. Squeeze cover and insert tabs in slots.

Master Unk

Cable

Idler

Cable

Dispensing Carton

Leave Chainand Cable

Inside D_spensing

Carton to PreventKinking.

Keep Chain and Cable

Taut When Dispensing

Master Link

Master

Clip-OnSpdng

.Unk Cap

Master

 

 

.- Unk Cap

 

 

 

Trolley

Pin

 

Threaded

Notch

 

Shaft _

Master

 

Round

Unk Bar

 

 

lotted

Hole

 

I Hole

iI

q

Master

Sprocket _

Opener

i_Unk

Bar

Cover

Sprocket

 

 

 

Front

Back

 

Tab

Slot

Tab Slot

Mounting

10

Page 9 Page 11
Image 10
Page 9 Page 11
Contents Garage Door Opener Start by reviewing these important safety alert symbols Instructions. Read the instructions carefullyYoull Need Tools Based on your particular requirements, there are SafetyClosed Position One-Piece Door without Track One-Piece Door with TrackClosed Position Carton Inventory SectionSafety Reversing Sensor @ @Assembly Section Pages 8 Assembly StepFasten the Rail to the Opener Install the Idler PulleyHardware Shown Actual Size Install the Chain/Cable Attach the Sprocket Cover Master Link Clip-OnSpdng Unk CapTighten Chain = Lo Tro,.yDetermine Header Bracket Location Installation Section Pages 12 Installation StepProceed to , One-piece door without track Jamb hardware ExampleWall Header Bracket Installation Install the Header BracketCeiling Header Bracket Installation Attach the Rail to the Header Bracket Insert a ring fastener to securePosition the Opener With the door fully open and parallel to the floorInstallation Step Hang the OpenerSerious injury or death Install the Door ControlSlide down to secure. Adjust screw for snug fit Shown Actual Size UihJIlnJIlilililil IlilnInstall the lens Install the Light and the LensInstall the light Attach the Emergency Release Rope and HandleElectrical Requirements Permanent Widng ConnectionsRightWrong Safety Reversing System Important Information about Safety Reversing SensorBe sure power to the opener is disconnected Sensor Safety ReversingInstalling the Brackets Garage door track installation preferredAligning the Safety Sensors Mounting and Wiring the Safety SensorsTrouble Shooting the Safety Sensors IIIIIlllillllILllllllllllllllll Fasten Door BracketIIIIIII11111111LLLIIIIIlI NutRBok Connect Door Arm to TrolleyAbove holes Adjustment Procedures for One-Piece Doors Adjust the UP and Down Limits Adjustment Section Pages 28 Adjustment StepHow and When to Adjust the Limits Adjustment Step If the door does not close completelyAdjust the Force How and When to Adjust the ForcesImportant safety check Test The Safety Reversing SensorTest the Safety Reverse System Press the remote control push button to open the doorTo reduce the risk of severe injury or death to persons MaintenanceSchedule Operation of the Door Control see Operation of Your OpenerManual disconnect Position If you do not have a Premium Control Console Receiver and Remote Control ProgrammingIf you have a Premium Control Console SECURITY,IHaving a Problem? Situation Probable Cause and SolutionOpener lights blink for 5 seconds Situation Probable Cause SolutionDoor opens but Doesnt turn offRail Assembly Parts Repair PartsInstallation Parts Opener Assembly Parts Br co.tact ASSEMe,vFor Sectional Doors Onl AccessoriesOnly through Sears Parts & Service With the door closedIndex Sears Warranty For in-homemajor brand repair servicePara 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.
Top Page Image Contents