Sears 139.18847 Installation Step 3

Header

Bracket

Cable

Pulley

Bracket

Temporary

Support

Header Wall

Garage

Door

The Chamberlain Group, Inc.

Attach Tee Rail to Header Bracket

2/4/92 - 4/9/92

T-rail

Clevis Pin

5/16"x2-3/4"

Ring Fastener

Header Bracket

Cable

Pulley

Bracket

T-rail

• Position the opener on the garage floor below the

header bracket. Use packing material as a

protective base.

If the door spring is in the way you'll need help.

Have someone hold the opener securely on a

temporary support to allow the T-rail to clear the

spring.

• Position the cable pulley bracket against the header

bracket.

• Align the bracket holes and join with a clevis pin as

shown.

• Insert a ring fastener to secure.

Installation Step 3

Attach the T-rail to the Header Bracket

Clevis Pin

5/16"x2-3/4" Ring Fastener

Axe de chape de 5/16 de pox2-3/4 po Anneau d'arrêt

Hardware Shown Actual Size

Contents

Main GARAGE DOOR OPENER 1/2 HP OWNERS MANUAL Model No. 139.18847 139.18857 For Residential Use Only Page You'll Need Tools Ropes left on a garage door could cause someone to become entangled and killed. SECTIONAL Door Installation If your door has extension springs, the opener must be installed in the center of the door. One-Piece Door with Track One-Piece Door with Track Installation (Cable - Canada) 3/3/93 One-Piece Door without Track ONE-PIECE Door Installation TO GARAGE DOOR Opener Carton Inventory NOTICE Assembly Hardware Kit 41A3534 Installation Hardware Kit 41A3475-4 Safety Reversing Sensor Installation Hardware Kit 41A4116 Assembly Step 1 To avoid installation difficulties, do not run the garage door opener until instructed to do so. Right Wrong Assemble the T-rail & Attach the Cable Pulley Bracket Assembly Section: Pages 8 11 Assembly Step 2 Install the Trolley on the T-rail Remember to use only these screws! Step 2 Install Trolley & Attach Chain Retainer Bracket Sears Chassis 4/12/92 Assembly Step 3 Assembly Step 4 Install the Chain/Cable & Attach the Sprocket Cover do not re-adjust the chain. ALWAYS Assembly Step 5 IMPORTANT INST ALLATION INSTRUCTIONS To reduce the risk of severe injury or death to persons: An improperly balanced door may not reverse and could result in severe injury or death. Ropes connected to a garage door can cause entanglement and death. Proceed to Step 2, page 14. SECTIONAL Door and ONE-PIECE Door With Track Installation Section: Pages 12 27 Installation Step 1 Determine Header Bracket Location The door might not reverse when required, and could cause serious injury or death. 1/30/92 - 4/7/92 Proceed to Step 2, page 14. 1/30/92 - 4/7/92 ONE-PIECE Door Without Track Read the Safety instructions on page 12. They also apply to doors without tracks. Fasten the Header Bracket to the Wall Hardware Shown Actual Size Installation Step 2 Install the Header Bracket Attach Tee Rail to Header Bracket 2/4/92 - 4/9/92 Installation Step 3 Attach the T-rail to the Header Bracket Installation Step 4 Position the Opener SECTIONAL Door & ONE-PIECE Door with Track You will need help at this point if the ladder is not tall enough. ONE-PIECE Door without Track Installation Step 5 Hang the Opener each The opener could fall and injure someone if it is not properly secured. Liftmaster Combination 5/23/92 Installation Step 6 Install the Door Control (For standard installation only) The garage door could close and cause serious injury or death. but where the garage door is visible. Installation Step 7 Install the Light and the Lens Do NOT connect the power and operate the opener at this time. close open Installation Step 9 Electrical Requirements and To prevent electrocution NOT The Safety Reversing System Information you'll need before you begin the installation of the safety reversing sensor. Installation Step 10 Install the Safety Reversing Sensor Figure 4 Figure 5 but not exceeding 6". Safety Sensor Page 2 Safety Sensor Disk #1 (Yellow) 11/5/91 - 4/9/92 Attaching Sensor to "C" Wrap and Wires to Operator 11/14/91 - 1/15/92 receiving eye glows steadily sending eye glows steadily, Installation Step 11 Fasten Door Bracket Note correct UP placement, as stamped inside the bracket. Door Bracket-Sectional 6/96 SECTIONAL Door Installation Procedure Fasten Door Bracket and Plate One-Piece Door Installation 2/4/92 - 4/7/92 All ONE-PIECE Door Installation Procedure Installation Step 12 Connect Door Arm to Trolley Hole Alignment Alternative 5/16"x1-1/4" clevis pin. above Can/DoorArmToTrolley 1 pc All ONE-PIECE Doors Adjustment Procedures for One-Piece Doors Adjustment Step 1 Adjust the UP and DOWN Limits down reverses up Adjustment Step 2 Adjust the Force up stops nuisance reversals Adjustment Step 4 Test the Safety Reverse System stops The door must reverse on striking the obstruction. Test Safety Reverse System SEARS Care of Your Opener IMPORTANT SAFETY INSTRUCTIONS MUST Maintenance Schedule Failure to properly adjust the opener may result in severe injury or death. Operation of Your Opener stop Operation of the Door Controls Adjust Force - SEARS The garage door could close and cause serious injury or death. Receiver and Remote Control Programming Having a Problem? Situation Probable Cause and Solution Having a Problem? (continued) Situation Probable Cause & Solution Page Repair Parts Accessories Required For Sectional Doors Only Accessories Art - SEARS 92 Side to Side 3/3/92 Index OWNERS MANUAL Model No. 139.18847 139.18857 GARAGE DOOR OPENER