ASSEMBLY STEP 5

Set the Tension

•Insert a screwdriver tip into one of the nut ring slots and brace it firmly against the trolley.

•Place a 7/16" open end wrench on the square end. Rotate the nut about 1/4 turn until the spring releases and snaps the nut ring against the trolley.

This sets the spring to optimum belt tension.

You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section.

Slot

uare End

 

Trolley

Square

 

End

Nut Rin(

 

INSTALLATION

IMPORTANT INSTALLATION INSTRUCTIONS

To reduce the risk of SEVERE INJURY or DEATH:

1.READAND FOLLOWALL INSTALLATIONWARNINGSAND INSTRUCTIONS.

2.Install garagedoor opener ONLYon properly balanced and lubricated garagedoor. An improperly balanceddoor may not reversewhen required and could result in SEVEREINJURYor

DEATH.

3.ALL repairs to cables, spring assembliesand other hardware MUST be made by a trained door systems technician BEFORE installing opener.

4.DisableALL locks and removeALL ropes connected to garagedoor BEFOREinstalling openerto avoid entanglement.

5.Install garagedoor opener 7 feet (2.13 m) or more above floor.

6.Mount emergency releasehandle6 feet (1.83 m) above floor.

7.NEVERconnect garage door openerto power source until instructed to do so.

8.NEVERwear watches, rings or loose clothing while installing or servicing opener.They could be caught in garage door or opener mechanisms.

9.Install wall-mounted garage door control:

•within sight of the garage door.

•out of reach of children at minimum height of 5 feet

(1.5 m).

•away from ALL moving parts of the door.

10.Placeentrapment warning label on wall next to garage door control.

11.Placemanual release/safetyreversetest label in plain view on inside of garage door.

12.Upon completion of installation, test safety reversalsystem. Door MUST reverseon contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor.

11

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Sears 139.53915D owner manual Assembly Step, Readand Followall Installationwarningsand Instructions, Death
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139.53915D specifications

The Sears 139.53915D is a significant addition to the lineup of garage door openers, blending both functionality and modern technology to enhance user convenience. This model is designed to accommodate residential garage doors, forming a reliable solution for homeowners who prioritize safety, security, and ease of use.

One of the standout features of the 139.53915D is its powerful motor, capable of handling heavy garage doors with ease. With its 1/2 horsepower motor, it ensures a smooth and swift opening and closing mechanism, allowing for quick access while still maintaining durability. This strength is particularly beneficial for larger or heavier doors that require more power for reliable operation.

The opener utilizes a chain drive system, renowned for its durability and strength. Chain drive systems are highly effective in providing reliable performance, making them a popular choice for various households. Despite this robust mechanism, the opener remains relatively quiet during operation, minimizing disruptions in the home environment.

A key characteristic of the Sears 139.53915D is its security features. It is equipped with rolling code technology, which generates a new code every time the remote control is used. This significantly enhances security by preventing unauthorized access and ensuring that only designated users can operate the garage door.

Additionally, the model features a safety reverse system, which automatically reverses the door's direction if it encounters an obstruction while closing. This not only protects vehicles and other possessions but also safeguards pets and children—an essential component for family households.

Installation of the Sears 139.53915D is designed to be straightforward, with comprehensive instructions that facilitate an efficient setup process. For those who prefer a seamless experience, the opener is compatible with several accessories, including smart home technologies. This compatibility allows users to integrate their garage door opener into a broader home automation system, providing added convenience and control through smartphone apps or smart devices.

In summary, the Sears 139.53915D garage door opener is a robust, reliable choice for homeowners seeking an efficient and secure opening mechanism. Its combination of a powerful motor, durable chain drive system, advanced security features, and ease of installation make it a formidable option in the market for garage door solutions.
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