Craftsman 139.53660SRT1, 139.53834SRT3 Adjustment Section Adjustment Step, Pages 28, How and When

Page 28

Adjustment Section:

Adjustment Step 1

Adjust the UP and DOWN Limits

Do not make any limit adjustments until the

safety reversing sensors are completely installed.

Limit adjustment settings regulate the points at which the door will stop when moving up or down.

The door will stop in the up direction if anything interferes with door travel. The door will reverse in

the down direction if anything interferes with the door travel (including binding or unbalanced doors).

To operate the opener, press the Door Control push button. Run the opener through a complete travel cycle.

•Does the door open and close completely?

•Does the door stay closed and not reverse unintentionally when fully closed?

If your door passes both of these tests, no limit adjustments are necessary unless the reversing test fails (See page 30).

Adjustment procedures are outlined below. Run the opener through a complete travel cycle after each adjustment.

Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off Simply wait 15 minutes and try again.

Read the procedures carefully before continuing on to Adjustment Step 2. Use a screwdriver to make limit adjustments.

Pages 28 - 30

 

 

Limit

 

 

Adjustment

 

 

Screws

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Left Side Panel

How and When

•If the door does not open completely but opens at leastfive feet:

Increase up travel. Turn the UP limit adjustment screw clockwise. One turn equals 2" of travel.

NOTE: To prevent the trolley from hitting the cover protection bolt, keep a minimum distance of 2-4"between the trolley and the bolt.

•If door does not open at least 5 feet:

Adjust the UP (open) force as explained in Adjustment Step 2.

• If the door does not close completely:

Increase down travel. Turn the DOWN limit adjustment screw counterclockwise. One turn equals 2" of travel.

if door still won'tclose completely and the trolley bumps into the pulley bracket (see page 4 or 5), try lengthening the door arm. (see page 26).

to Adjust the Limits

If you have adjusted the door arm to the maximum length and the door still will not close completely, lower the header bracket. See Installation Step 1, pages 12 and 13.

• If the opener reverses in fully closed position:

Decrease down travel. Turn the DOWN limit

adjustment screw clockwise. One turn equals 2" of travel.

•If the door reverses when closing and

there is no visible interference to travel cycle:

If the opener lights are flashing, the Safety Reversing Sensors are either not installed, misaligned, or obstructed. See Troubleshooting, page 23.

Test the door for binding: Pull the emergency release handle. Manually open and close the door. If the door is binding, call for garage door service. If the door is not binding or unbalanced, adjust the DOWN (close) force. See Adjustment Step 2.

28

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Contents Craftsman Start by reviewing these important safety alert symbols YoullNeed Tools Sectional Door Installation Closed PositionTO your Installation ONE-PIECE Door Installation One-PieceDoor Without TrackOne-Piece Door With Track Wit w edT o Carton InventorySafety Reversing Sensor Installation Installation HardwareHardware Assembly Section Pages 8 Assemble the T-rail & Attach Cable Pulley BracketOperation,noiseand/or RightWrong Hardware Shown Actual SizeInstall the Trolley on the T-rail Hardware ShownActual Size Fasten Raft to OpenerInstall the Chain/Cable Attach the Sprocket Cover Assembly StepMasterFigure Trolley before adjusting chain Tighten the Chain & CableIF1 --L--Ji AbovethedoorIll One-piece door without track Jamb hardware One-piece door without track Pivot hardwareFasten the Header Bracket to the Wall Install the Header BracketFasten the Header Bracket to the Ceiling Attach the T-rail to the Header Bracket Position the Opener Sectional Door & ONE-PIECE Door with TrackL!LI Hang the OpenerInstall the Door Control Do not connect to live electrical wiring. ConnectDoor Control Button Fasten securely with 6ABx1-1/2 screws Illllllllltllllllllllll32 explains how to use the door control Install the Light and the LensAttach the Emergency Release Rope and Handle Electrical Requirements Permanent Wiring ConnectionsRightWrong Safety Reversing System Facing the door from inside the garageInstall the Safety Reversing Sensor Right sides of the door Finger tighten the lock nutsShown Actual Size Alternate Wall MountTrouble Shooting IIIIIII!!11111!111 Fasten Door BracketII!!l!ll!!!lLllllllllllllllI!l!l!l Connect Door Arm to Trolley SEC!ONA DoorS OniyHole Alignment AlternativeAdjustment Procedures for One-PieceDoors Open Door Adjustment Decrease UP limitClosed Door Adjustment Decrease Down limit Assemble the Door ArmAdjustment Section Adjustment Step To Adjust the LimitsAdjust the UP and Down Limits Pages 28Adjust the Force How and When toAdjust the Forces Test the Down close forceAdjustment Step Test The Safety Reversing SensorTest the Safety Reverse System Must reverse on striking the obstructionMaintenance To reduce the risk of severe injury or death to personsCare of Your Opener ScheduleOperation of Your Opener Lockout positionReceiver and Remote Control Programming 53000SRT Series Garage Door OpenersProbable Cause and Solution Having a Problem?Situation Having a Problem? Probable Cause & SolutionRepair Parts Installation PartsOpener Assembly Parts Wie \FrAccessories Index For the repair or replacement parts you need For in-home major brand repair serviceGive the following information Product Type Part Number Model Number Part Description

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

The Craftsman 139.53660SRT1, 139.53646SRT2, 139.53335SRT3, 139.53834SRT3, and 139.53645SRT3 are a series of advanced garage door openers designed for homeowners looking to enhance convenience, security, and functionality in their daily lives. Each model is equipped with cutting-edge technologies that streamline garage access while ensuring safety and durability.

One of the standout features across these models is the use of a powerful motor system, providing reliable performance for heavy garage doors. The motor's horsepower rating varies across the models, but all ensure consistent lifting strength and rapid opening and closing speeds, catering to different door weights and sizes.

In terms of security, these Craftsman models incorporate advanced encryption technologies, making unauthorized access nearly impossible. The security features include rolling code technology, which changes the access code each time the remote is used, thus preventing cloning and ensuring that only authorized users can operate the door.

These openers also prioritize ease of use. With their compatible smartphone app integration, users can remotely control and monitor their garage doors. Whether they are at home or away, users can receive notifications, check the status of their doors, and even open or close them at the touch of a button, adding an extra layer of convenience.

The installation process is also user-friendly, with many of these models featuring an easy-to-follow instruction manual. Homeowners can typically complete the installation themselves, saving time and money compared to hiring a professional. The durable construction of these openers ensures that they withstand the test of time, with many units equipped with weather-resistant materials that protect against rust and corrosion.

In addition to their functional features, the aesthetic designs of the Craftsman series are noteworthy. They fit seamlessly into a variety of garage styles, with a sleek finish that enhances overall garage appeal.

Overall, the Craftsman 139.53660SRT1, 139.53646SRT2, 139.53335SRT3, 139.53834SRT3, and 139.53645SRT3 garage door openers represent a blend of functionality, security, and user convenience. Homeowners seeking reliable, smart, and efficient solutions for managing their garage doors will find these models highly effective, offering peace of mind and ease of use in their everyday lives.
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