Craftsman 1/2 HP GARAGE DOOR OPENER 139.53978SRT User Manual

Owner’s ManualCRHFTSMBN*1/2 HPGARAGE DOOR OPENERFor Residential Use OnlyModel No:139.53978SRTCAUTION:Read and follow all safety rules and operating in

Assembly Step 4Install the Chain/Cable and Attach the Sprocket Cover1. Pull the cable around the idler pulley and toward the trolley.2. Connect the

Assembly Step 5Tighten hie Chain• Spin the inner nut and lock washer down the threaded shaft, away from the trolley.• To tighten the chain, turn outer

Installation Section: Pages 12-27Installation Step 1Determine Header Bracket LocationInstallation procedures vary according to garage door types. Foll

Read the Safety Instructions on page 12. They also apply to doors without tracks.• Close the door and mark the inside vertical centerline of your gara

Installation Step 2InstaU the Header BracketYou can attach the header bracket either to the wall above the garage door, or to the celling. Follow the

Installation Step 3Attach the Rail to the Header BracketHeader WallHeader BracketNOTE: (Optional) W ith an existing Craftsman installation, you may re

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

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

Installation Step 6Instan the Door ControlLocate the door control within sight of the door at a minim um height of 5 feet where small children cannot

6. Attach the User Safety Instruction label to the wall near the door control, and frie Maintenance Instruction label in a prominent location on the

Contents PageA review of safety alert symbols...2You'll need toots...3Safety informa

Installation Step 9Electrical RequirementsTo reduce the risk of electric shock, your garage door opener has a grounding type plug with a third groundi

The Safety Reversing SystemIMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSORThe safety reversing sensor must\i& connected and aligned correc

Figure 2 door track mount (Right side)INSTALLING THE BRACKETSBe sure power to the opener is disconnected.Install and align the brackets so the sensors

MOUNTING AND WIRING THE SAFETY SENSORS• Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor. Use wing nuts to fasten sensor

Installation Step 11Fasten Door BracketFollow instructions which apply to your door type as illustrated below or on page 25.To prevent damage to s

Please read and comply with the warnings and reinforcement instructions on page 24. They apply to one-piece doors aiso.Header Wall• Center

Installation Step 12Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on page 27...

Assemble the Door Arm:• Fasten the straight and curved door arm sections together to the longest possible length {with a 2 or 3 hole overiap).• With t

Adjustment Section: Pages 28 - 30Adjustment Step 1Adjust the UP and DOWN Limits Do not make any limit adjustments until the safety reversing sensors a

Adjustment Step 2Adjust the ForceForce adjustment controls are located on the back panel of the opener. Force adjustment settings regulate the amount

You'll Need ToolsDuring assembly, installation and adjustment of the opener, instructions will call for hand tools shown below.Locking pliersHack

Adjustment Step 3Test The Safety Reversing Sensor• Press the remote control push button to open the door.• Place the opener carton in the path of the

IMPORTANT SAFETY INSTRUCTIONSTo reduce the risk of severe injury or death to persons:1. READ AND FOLLOW ALL INSTRUCTIONS.2. Do not permit children eit

Operation of Your OpenerActivate the opener with any of the following:• The Remote Control: Hold push button down until the door starts to move.• The

Receiver and Remote Control ProgrammingSECUliri'Y^'To comply with FCC rules, adjustment or modifications o( this receiver and/or

Having a Problem?SituationProbable Cause and SolutionThe opener doesn t operate from either the Door Controlar the remote control:1. Does the

Having a Problem? (continued)SituationProbable Cause & SolutionThe door opens but won't dose:1. If the opener lights blink, check the safety

Repair PartsRail Assembly PartsKEYNO.PARTNO.DESCRIPTION11A995Master link kit241C5141-1Complete trolley assembly3183C158-3Rail - front (header) section

Repair PartsOpener Assembly PartsDriveGearCenter Limit Contact(Up)ContactKEY PART NO. NO.1 31D3802 41C4220A4567891041A281741B424541A4352175B88108D5

AccessoriesSears offers many useful accessories for your garage door opener. They are illustrated below with Sears model numbers and des

IndexAccess Door/Outside Key Release Accessory...

Before you begin, survey your garage area to see whether any of the conditions beiow appiy to your installation. 'Horizontal and v

For in-home major brand repair service:Call 24 hours a day, 7 days a week 1-800-4-MY-HOME^“ (1 -800-469-4663)Para pedir servicio de reparación a domic

Before you begin, survey your garage area to see whether any of the conditions beiow apply to your installation.One-Piece Door without TrackFINISHED C

Carton InventoryYour garage door opener is packaged in two cartons which contain parts illustrated below. Accessories will depend on model purchased.

Separate all hardware from the packages in the rail carton and the opener carton, as shown below, for the assembly and installation proc

Assembly Section: Pages 8-11To avoid installation difficulties, do not run the garage door opener until instructed to do so.Assembly Step 1Assemble th

Assembly Step 2Fasten the Rail to the OpenerInsert a 1/4"-20x1 -3/4 bolt into the cover protection bolt hole on the back end of the rail as shown