ASSEMBLY STEP 1

Assemble the Rail & Install the Trolley

To avoid installation difficulties, do not run the garage door opener until instructed to do so,

The front rail has a cut out "window" at the door end (see illustration). The hole above this window Is larger on the top of the rail than on the bottom. A smaller hole 3-112" away is close to the rail edge. Rotate the back rail so it has a similar ho/e close to

the opposite edge, about 4-314" from the far end. A 3-piece rail uses two back rails.

1.Remove the straight door arm and clevis pin packaged inside the front rail and set aside for Installation Step 12.

2.Align the rail sections on a flat surface exactly as shown and slide the tapered ends into the larger

ones. Tabs along the side will lock into place.

3.Place the motor unit on packing material to protect the cover, and rest the back end of the rail on top.

For convenience, put a support under the front end of the rail.

4.As a temporary trolley stop, clamp a locking pliers onto the rail, 8" from the center of the idler pulley hole, as shown.

5.Check to be sure there are 4 black plastic wear pads inside the inner trolley. If they became loose during shipping, check all packing material. Snap them back into position as shown.

6.Connect the inner and outer trolleys as shown.

7.Slide the trolley assembly along the rail from the back end to the locked pliers.

Trolley

End

Back Rails

(TO MOTOR UNIT)

Inner TrolLey

Wear Pads

8

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Sears 139.53971SRT, 139.53960SRT, 139.53968SRT Assemble the Rail & Install the Trolley, Back Rails, To Motor Unit
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139.53960SRT, 139.53968SRT, 139.53971SRT specifications

Sears 139.53971SRT, 139.53968SRT, and 139.53960SRT are a series of garage door openers that have gained recognition for their reliability and advanced features. These models represent a shift towards smarter technology in home automation, providing homeowners with increased convenience, security, and control over their garage doors.

One of the standout features of these models is their Smart Technology integration. Each unit is equipped with the ability to connect to Wi-Fi, allowing users to control their garage doors remotely through a smartphone app. This means that you can open or close your garage door from anywhere, check its status, and receive notifications if the door is left open for an extended period. This feature enhances home security by providing real-time updates, giving users peace of mind when they are away from home.

The 139.53971SRT model is designed with a powerful motor that ensures smooth and quiet operation, making it suitable for homes with bedrooms adjacent to the garage. It features a built-in battery backup system, which is crucial during power outages, providing peace of mind that your garage door can still be operated.

Meanwhile, the 139.53968SRT and 139.53960SRT models come with a range of safety features such as the security keypad and 3-button remote control, which allow multiple users to gain access without the need for a physical key. The Smart Technology also incorporates advanced encryption protocols that help prevent unauthorized access, ensuring the garage remains secure.

Additionally, all three models are designed for easy installation and come with a variety of installation accessories. Their adaptability makes them compatible with a wide range of garage doors, enhancing their appeal for different homeowners.

In terms of longevity, the garage door openers are built with high-quality materials, promising durability and a longer lifespan. They also feature a noise-dampening design that minimizes operational sound, making them an excellent choice for residential applications.

Overall, the Sears 139.53971SRT, 139.53968SRT, and 139.53960SRT garage door openers combine modern technology with user-friendly features to offer a secure, efficient, and convenient garage solution for today's smart homes. Their innovative approach addresses the traditional needs of homeowners while embracing new technological advancements, making them a relevant choice in today's market.
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