Manuals / Craftsman / Household Appliance / Garage Door Opener

Craftsman 139.53978SRT To reduce the risk of severe injury or death to persons, Maintenance

Models: 139.53978SRT

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IMPORTANT SAFETY INSTRUCTIONS

To reduce the risk of severe injury or death to persons:

1.READ AND FOLLOW ALL INSTRUCTIONS.

2.Do not permit children either to operate or to play with the opener. Keep remote control in a location inaccessible to children.

3.Operate opener only when the door is in full view and free from any obstruction. Keep the door in sight until it is completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.

4.Check safety reversal system monthly. See page 30. The garage door MUSTreverse on contact with a one-inch (or a 2x4 board laid

flat) object placed on the floor. If an adjustment is made to either the force or the limit of travel,

both adjustments may be needed and the safety reversal system must be checked. Failure to properly adjust the opener may result in severe injury or death.

5.If possible, use the emergency release only when the door is in a closed position. Caution should be taken whenever the disconnect cord is actuated with the door open. Weak or broken springs may cause the door to fall rapidly, causing injury or death to persons.

6.KEEP GARAGE DOORS PROPERLY BALANCED. See page 3. An improperly balanced door may not reverse when required and could result in severe injury or death,

Repairs to cables, spring assemblies and other hardware must be made by a professional garage door person.

7.Disconnect the electric power to the garage door opener before making any repairs or removing the covers.

8.SAVE THESE INSTRUCTIONS.

Care of Your Opener

Limit and force adjustment controls

Limit Controls

Force Controls

Adjustment Label

Adjustment Label

(Located on the left side panel)

(Located on the right side panel)

Weather conditions may cause some minor changes in door operation requiring some re- adjustments, particularly during the first year of operation.

Pages 28 and 29 refer to the limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully.

Repeat the safety reverse test (page 30) after any adjustment of limits or force.

The

remote control

 

The

lithium battery should

3-FUNCTION

Open this end

produce power for up to

first to avoid

cracking

5 years. To replace battery,

 

use the visor clip or screwdriver

 

blade to pry open the case, as

 

shown. ("Open" location is

 

stamped on back of transmitter case.) Insert battery positive side down.

Replace cover as follows. 3-Function remote: Insert the 3 tabs at the opposite end and snap shut. Dispose of old batteries properly.

Maintenance

Once a Month

Manually operate door. If it is unbalanced or binding, call for professional garage door service.

Check to be sure door opens & closes fully. Adjust limits and/or force if necessary.

(See pages 28 and 29.)

Repeat the safety reverse test. Make any necessary adjustments (See page 30).

Schedule

Twice a Year

Check chain tension. Disconnect trolley first. Adjust if necessary (See page 11).

Once a Year

Oil door rollers, bearings and hinges. The opener does not require additional lubrication. Do not grease the door tracks.

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Craftsman 139.53978SRT owner manual To reduce the risk of severe injury or death to persons, Maintenance, Schedule
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139.53978SRT specifications

The Craftsman 139.53978SRT is an advanced garage door opener that combines reliability, performance, and ease of use. Designed to cater to the needs of modern homeowners, this model stands out with its robust features and technological innovations.

One of the key highlights of the Craftsman 139.53978SRT is its powerful motor, delivering a peak horsepower equivalent to ensure smooth and efficient operation. This allows it to effortlessly lift even the heaviest of garage doors, making it suitable for various types of residential garage doors. The quiet operation of this opener is another major advantage, allowing for a peaceful environment in and around the garage.

Another notable feature is the smart technology integration. The Craftsman 139.53978SRT is compatible with a range of smart home systems, allowing users to control their garage door remotely via a smartphone app. This feature not only adds convenience but also enhances security, as users can receive alerts and notifications about the status of their garage door, ensuring peace of mind.

Security is a priority with this model, which comes equipped with rolling code technology. This mechanism generates a new code each time the remote is used, preventing unauthorized access and ensuring that your garage remains secure from intruders. Additionally, the enhanced safety features include safety sensors that detect obstacles, automatically reversing the door's movement if something is detected, thereby preventing accidents.

Installation and setup are straightforward, thanks to the user-friendly design of the Craftsman 139.53978SRT. The unit includes detailed instructions and all necessary hardware for installation. Many users can set it up within a few hours without the need for professional assistance.

With a durable construction, the Craftsman 139.53978SRT is built to last. It has a sleek design that complements various home aesthetics while withstanding wear and tear from daily use. Maintenance is minimal, with easy access to essential components for servicing.

In summary, the Craftsman 139.53978SRT offers a perfect blend of power, technology, and security features. Its user-friendly design, combined with smart technology compatibility and robust safety measures, makes it an ideal choice for homeowners seeking a reliable garage door opener. Whether you’re looking to upgrade an old system or install a new one, this model is sure to meet your requirements and enhance the functionality of your garage.