Craftsman 139.53664SRT2 owner manual Adjustment Section Pages 28, Adjust the UP and Down Limits

Page 28

Adjustment Section: Pages 28 - 30

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 stopwhen 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 proceeding to Adjustment Step 2, Use a screwdriver to make limit

adjustments.

Improper adjustment of the travel limits 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. Test

the safety reverse system following all adjustments to the travel limits. See page 30.

Cover /

Protection

Bolt

Umit Adjustment

Screws

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Adjustment Label

How and When to Adjust the Limits

•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 the 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).

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 manual 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.

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Contents CRRFTSMIiN Start by Reviewing these Important Safety Alert Symbols MechanicalElectricaLYoull Need Tools Otherwise, the safety reverse system may not Closed PositionIt must close on the floor all the way across Work properly. See page 30. Floor or door shouldOne-Piece Door with Track One-P ece Door without TrackHardw&faSlsenlguired Carton Inventory Installation Hardware Safety Reversing Sensor Installation HardwareAssembly Section Pages 8 Assembly StepAssemble the T-rail Attach the Belt Pulley Bracket Hardware Shown Actual SizeInstall the Trolley on the T-rail Fasten the T-rail to the OpenerPlace Install the Belt Set Belt TensionCheck to make sure the belt is not twisted Attach the Belt Cap Retainer To attach the belt cap retainerInstallation Section Installation Step #youneed to install the header bracketPages 12 Proceed to ,One-piece door without track Jamb hardware ExampleInstall the Header Bracket Fasten the Header Bracket to the WallFasten the Header Bracket to the Ceiling DoorHardware Shown Actual SizeAttach the T-rail Header Bracket Shown Actual SizePosition the Opener Opener could fall and injure someone if it Hang the OpenerIs not properly secured. Fasten the opener Install the Premium Control Console Install the Lights Lenses Install the lenses32 explains how to use the door control Install the lightsCode, refer to the following procedure If permanent wiring is required by your localElectrical Requirements Safety Reversing System Facing the door from inside the garageInstall the Safety Reversing Sensor Sensors will face each other across the garage doorFinger tighten the lock nuts Alternate Floor MountAligning the Safety Sensors Trouble ShootingFasten Door Bracket Bracket Hodzontal and vertical reinforcement Screwsnot provided Connect Door Arm to Trolley Hole Alignment AlternativeFasten the straight and curved door arm sections Adjustment Procedures for One-Piece DoorsTogether to the longest possible length, with a 2 or Adjustment Section Pages 28 Adjust the UP and Down LimitsHow and When to Adjust the Limits If the door does not close completelyAdjustment Step Adjust the ForceHow and When to Adjust the Forces Test the Down close forceTest The Safety Reversing Sensor Test the Safety Reverse SystemImportant safety check AdjustmentMaintenance To reduce the risk of severeInjury or death to persons Care of Your OpenerOperation of Your Opener Operation of the Door ControlsIf you have a Premium Control Console Receiver and Remote Control ProgrammingIf you do not have a Premium Control Console Probable Cause and Solution Having a Problem?Situation Probable Cause & Solution Rail Assembly Parts Repair PartsInstallation Parts Repair Parts Opener Assembly PartsFor Sectional Doors On12 AccessoriesIf you do not have Premium Control Console Index 8OO-366-PART Product Type Part Number Model Description
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