Craftsman 139.53491SRT User Manual

1/2 HP
GARAGE DOOR OPENER
OWNER’S
MANUAL
Model No.
139.53491SRT
For Residential Use
Only
Caution:
Read and follow all
safety rules and
operating instructions
before first use of this
product.
Fasten the manual
near the garage door
after installation.
The Chamberlain Group, Inc.
Liftmaster Model Screw Drive
# 114A1794
Cover Illustration
5/3/94 - 6/14/94 - 10/18/94
Complies with UL 325
regulations effective
January 1, 1993
®
®
®
®
■ Safety Precautions
■ Assembly
■ Installation
■ Adjustment
■ Care and Maintenance
■ Operation
■ Troubleshooting
■ Parts List
®
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

Craftsman 139.53491SRT Specifications

General

Type	Chain Drive
Horsepower	1/2 HP
Remote Control	Yes
Frequency	60 Hz
Battery Backup	No
Max Door Height	7 ft
Voltage	120V

Summary

Safety Information and Initial Checks

Safety Precautions and Information

Essential safety rules and precautions before operating the opener.

Test Your Door for Balance

Assembly Process

Assemble the Rail

Fasten Rail to Power Unit & Install Trolley

Important Installation Safety Instructions

Installation Steps

Determine Header Bracket Location

Install Header Bracket

Attach Rail to Header Bracket

Safety Reversing Sensor

Install Safety Reversing Sensor

Detailed steps for mounting and aligning the safety reversing sensor eyes.

Position the Opener

Hang the Opener

Install Door Control and Wiring

Fasten Door Bracket (Sectional)

Fasten Door Bracket (One-Piece)

Connect Door Arm (Sectional)

Assemble and Connect Door Arm (One-Piece)

Adjustment Procedures

Adjust UP and DOWN Limits

Procedure for setting the travel limits for opening and closing the garage door.

Adjust Force Settings

Test Safety Reversing Sensor

Test Safety Reverse System

Opener Care and Maintenance

Important Safety Instructions

Critical safety warnings for general operation and maintenance.

Opener Operation

Lights and Door Controls

Receiver and Remote Control Programming

Troubleshooting Guide