Craftsman 139.53674SRT2 Owner's Manual

GARAGE DOOR OPENEROwner’sManualModel No.139.53661SRT3139.53671SRT3139.53672SRT3139.53673SRT3139.53674SRT2139.53677SRT3For Residential UseOnly Caution:

Assembly Step 4Install the Chain/Cable &Attach the Sprocket CoverSprocketCoverMountingPlateFront Tab SlotBack Tab SlotTop of OpenerOpener Sprocket

• Spin the inner nut and lock washer down thethreaded shaft, away from the trolley.• To tighten the chain, turn outer nut in the directionshown. As yo

• Open your door to the highestpoint of travel as shown. Drawan intersecting horizontal lineon the header wall 2" abovethe high point. This heigh

DoorHighest Pointof TravelHeaderWallPivotDistanceHeader WallVerticalCenterlineVerticalCenterline ofGarage Door2x4– Unfinished – CeilingStructural Supp

Lag Screws5/16"x9x1-5/8"HighestPoint of Travel(of Garage Door)VerticalCenterLineHeaderWallGarageDoorUPCEILING MOUNT ONLYWallMounting HolesOp

HeaderBracketCablePulleyBracketTemporarySupportHeader WallGarageDoorT-railClevis Pin5/16"x2-3/4 "Ring FastenerHeader BracketCablePulleyBrack

Installation Step 4Position the OpenerFollow instructions which apply to your doortype as illustrated.To prevent damage to steel, aluminum,fiberglass

Installation Step 5Hang the OpenerTwo representative installations are shown.Yours may be different. Hanging brackets shouldbe angled, Figure 1, to pr

Installation Step 6Install the Door Control 18PREMIUM CONTROLCONSOLESTANDARD CONTROLCONSOLELockLightPush ButtonLightedPush ButtonDOOR CONTROL BUTTONAn

Lens GuideLens Slot75 Watt Max.Light BulbLens TabLight LensInstall the lights• Install a 75 watt maximum light bulb in the socket.The light will turn

Start by reviewing these important safety alert symbols2Contents PageA review of safety alert symbols...2You'll nee

To reduce the risk of electric shock, your garagedoor opener has a grounding type plug with a thirdgrounding pin. This plug will onlyfit into a ground

The safety reversing sensor mustbe connectedand aligned correctly before the garage dooropener will move in the down direction. This is arequired safe

#14-10x1-1/2" HHLag Screw#10-32x3/8"Screw1/4"-20Lock Nut#10x32Lock NutStaples1/4"-20x1/2"Carriage BoltsInstallation Step 10In

Invisible Light BeamProtection AreaSensorSensorConnect Wire toOpener TerminalsBell WireBell WireFinishedCeilingOPENER TERMINAL SCREWSSensorConnections

Installation Step 11Fasten Door Bracket Follow instructions which apply to your doortype as illustrated below or on page 25.To prevent damage to steel

Horizontal and verticalreinforcement is needed forlightweight garage doors(fiberglass, aluminum, steel, door with glass panel, etc.).(Not Provided)Hea

Installation Step 12 Connect Door Arm to TrolleyFollow instructions which apply to your doortype as illustrated below and on page 27.Make sure garage

All ONE-PIECE DoorsNuts5/16"-18LockWashers5/16"RingFastenerStraightArmScrews5/16"-18x7/8DoorBracketClevis Pin5/16"x1-1/4"Curv

Adjustment Step 1Adjust the UP and DOWN LimitsDo not make any limit adjustments until thesafety reversing sensors are completelyinstalled.28Limit adju

Adjustment Step 2Adjust the ForceToo much force on the door will interfere withthe proper operation of the safety reversesystem. The door might not re

PliersWire CuttersClaw HammerHack SawScrewdriverAdjustable End Wrench1/2" and 7/16" Socketsand WrenchDrillTape Measure21StepladderPencil3/16

Adjustment Step 4Test the Safety Reverse SystemTest:• Place a one-inch board (or a 2x4 laid flat) on thefloor, centered under the garage door.• Operat

Once a MonthManually operate door. If it is unbalanced orbinding, call for professional garage door service.Check to be sure door opens & closes f

To open the doormanually:The door should be fullyclosed if possible. Pulldown on the redemergency releasehandle and lift the doormanually. To reconne

SRT (learn)ButtonIndicatorLightBACKPANELKGKG1397513975123SECURITY✚Garage Door OpenerCode programming instructions arealso located on the opener panel.

1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light,check the fuse box or the circuit breaker. (Some outlets

Having a Problem? (continued)Situation Probable Cause & SolutionThe door reverses forno apparent reasonand opener lightsdon't blink:1. Is som

9NOTICE78UPCEILING MOUNT ONLY101920161718142LOCKLIGHT1311131215654TO GARAGE DOOR13456742RAIL GREASENO. 83A4Repair PartsRail Assembly PartsInstallation

Repair PartsOpener Assembly Parts1210811131415161943DNUPBrownWire(Down)ContactLIMIT SWITCHASSEMBLYGreyWireYellowWire(Up)ContactCenter LimitContactDriv

Sears offers many useful accessories for your garage door opener. They are illustrated below withSears model numbers and descriptions.139.53684139.536

IndexAccess Door/Outside Key Release Accessory...4, 5Chain

4Safety Reversing SensorHorizontal and vertical reinforcementis needed for lightweight garage doors(fiberglass, steel, aluminum, door with glass panel

SEARS WARRANTYFULL 90-DAY WARRANTY ON GARAGE DOOR OPENERFor 90 days from the date of purchase, Sears will repair this Garage Door Opener, free of char

Safety Reversing SensorFINISHED CEILINGSupport bracket& fasteninghardware is required.See page 17.Slack in chain tensionis normal whengarage door

6Straight DoorArm SectionCurved DoorArm SectionSafety LabelsandLiteratureCablePulley BracketChain and Cablein Dispensing CartonHeader BracketUPCEILING

7Lock Washer5/16" (4)Nut 5/16"-18 (6)Clevis Pin5/16"x2-3/4" (1)NOTICEHandleInsulatedStaples (10)Assembly Hardware Installation Ha

8Assembly Step 1Assemble the T-rail & Attach the Cable Pulley Bracket• Align the 3 T-rail sections on a flat surface exactlyas shown. The end sect

Assembly Step 2Install the Trolley on the T-rail• Place the opener on packing material to protectthe cover. For convenience, put a support underthe ca