Chamberlain 1270LMC Attach the T-railto the Header Bracket

Installation Step 3

Attach the T-rail to the Header Bracket

Header Wall

Header

Bracket

Belt 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 belt pulley bracket against the header bracket.

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

•Insert a ring fastener to secure.

Ring Fastener

Header Bracket

Clevis Pin

5/16"x2-3/4 "

Garage

Door

Hardware Shown Actual Size

Belt Pulley Bracket

T-rail

Temporary

Support

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

Contents

Page CONTENTS PAGE Assembly Section - Pages 6 – Installation Section - Pages 8 – Adjustment Section - Pages 24 – Page Sectional Door Installation One-PieceDoor Installation One-PieceDoor without Track One-PieceDoor with Track Installation Hardware Safety Reversing Sensor Attach the T-railto the Opener Set the Belt Tension Attach the Belt Cap Retainer Determine Header Bracket Location ONE-PIECEDoor Without Track Install the Header Bracket Attach the T-railto the Header Bracket Position the Opener Hang the Opener Install the Multi-Function Door Control Panel Install the Lights and the Lenses Attach the Manual Release Rope and Handle Electrical Connections Figure 1: Install the Safety Reversing Sensor Trouble Shooting Fasten Door Bracket All ONE-PIECEDoor Installation Procedure Connect Door Arm to Trolley All ONE-PIECEDoors Assemble the Door Arm: Adjustment Procedures for One-PieceDoors Open Door Adjustment: Decrease UP limit Adjust the UP and DOWN Limits Adjust the Force Test the Protector System® Test the Safety Reverse System Limit and force adjustment controls Maintenance Schedule Operation of the Door Controls To Add A Remote To Erase All Remote Control Codes All the codes the opener has learned will be erased Code programming instructions are also located on the opener panel Situation Probable Cause & Solution The opener doesn't operate from either the Door Control or the remote control: Opener operates from the remote, but not from Door Control: The door operates from the Door Control, but not from the remote control: (continued) Rail Assembly Parts Installation Parts Opener Assembly Parts Model 1702LMC Outside Quick Release: Remote Control: Outside Keylock: "Smart" Remote Control: 8 foot Complete Rail: Access Door/Outside Quick Release Accessory Garage Door Manual Release Rope & Handle Opener Terminals Receiver and Remote Controls LIFT-MASTERGARAGE DOOR OPENER FIVE-YEARLIMITED WARRANTY