Sears 139.53640SRT Adjustment Section Pages 28 Adjustment Step, 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 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 Wall Control push bar. 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.

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.

000

Left Side Panel

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LimitAdjustment

Screws

INCREASE

DOWNUP

TRAVEL TRAVEL

Adjustment Labet

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.

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.

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, 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 12and 13.

to Adjust the Limits

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 Sensor is obstructed. Remove the obstruction.

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.

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Contents Sears Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.AInstallation Section pages 11 Start by reviewing these important safety alert symbolsMechanical Electrical Youll Need Tools IArm One-Piece Door without Track One-Piece Door with TrackBefore you begin, survey your garage area to Closed PositionEndsections Opener Carton inventoryAssembly Hardware Installation HardwareSafety Reversing InstallationAssembly Section Pages 8 Assembly StepAssembly Step Install the Trolley on the T-railFasten the T-rail to the Opener Hardware Shown Actual SizeLinkBar Figure To make Sure the chain is notTwisted To attach the sprocket coverImportant Installation Instructions Tighten the Chain & CableProceed to , RememberOne-piecedoor without track jamb hardware One-piecedoor without track Pivot hardwareInstallation Step Install the Header BracketFasten the Header Bracket to the Wall Fasten the Header Bracket to the CeilingAttach the T-rail to the Header Bracket Tro, y Position the OpenerNstallation Step Two representative installations are shownHang the Opener Install the Deluxe Lighted Console Wall Control See Safety Reversing Sensor Instructions beginning onOutdoor Key Switch Accessory Connections Clearly, and there are no obstructions to door travelInstall the Lights and the Lenses Install the lightsInstall the lenses Attach Emergency Release Rope HandleWiring Electrical RequirementsConnections PermanentSafety Reversing System Facing the door from inside the garageInstall the Safety Reversing Sensor Alternate Floor MountTrouble Shooting Push Connector Wire Connector Until You hear a clickFasten Door Bracket Finished Ceiling Connect Door Arm to Trolley Hole Alignment AlternativeAdjustment Procedures for One-Piece Doors Assemble the Door ArmDecrease UP limit Connect the door arm to the trolleyAdjustment Section Pages 28 Adjustment Step Adjust the UP and Down LimitsTo Adjust the Limits How and WhenAdjust the Force To Adjust the ForcesTest the UP open force If the door doesnt open at least 5 feetTest the Safety Reverse System Test The Safety Reversing SensorImportant safety check Maintenance Remote control batteryDispose of your old battery properly Care of Your OpenerOperation of Your Opener Operation of the Deluxe Lighted Console Wall ControlReceiver and Remote Control Programming Mini 3-Function Remote ControlTo Add a Remote Control To Erase All Remote control CodesHaving a Problem? Situation Probable Cause and SolutionSituationProbable Cause & Solution Door opens butRepair Parts Installation PartsOpener Assembly Parts 1918Accessories Index For the repair or replacement parts you need For the location of a

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