ASSEMBLY STEP 5

Set the Tensionand Install the SprocketCover

1.By hand, thread the spring trolley nut on the threaded shaft until it is finger tight against the trolley. Do not use any tools.

2.Removethe screwdriver.

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

4.Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end wrench about a quarter turn until the spring releasesand snaps the nut ring against the trolley. This sets the spring to optimum belt tension.

5.Position the sprocket cover over the garagedoor opener sprocket and attach with 8x3/8" hex screws.

Youhave now finished assemblingyour garage door opener. Please read the following warningsbeforeproceedingto the installation section.

Nut Ring

Nut Ring

Hex Screws

i.,_

1FTER-1/4"

HARDWARESHOWN ACTUALSIZE

(3.18 cm)

 

Sprocket

 

Hex Screw 8x3/8"

Spring/Trolley Nut

INSTALLATION

IMPORTANTINSTALLATIONINSTRUCTIONS

To reducethe risk of SEVEREINJURYor DEATH:

1.READAND FOLLOWALL INSTALLATIONWARNINGSAND INSTRUCTIONS.

2.Install garage door opener ONLY on properly balancedand lubricated garagedoor. An improperly balanceddoor may NOTreversewhen required and could result in SEVERE INJURY or DEATH.

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

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

5.Install garage door opener 7 feet (2.1 m) or more above floor.

6.Mount the emergency releasewithin reach, but at least 6 feet

(1.83 m) above the floor and avoiding contact with vehicles to avoid accidental release.

7.NEVERconnect garage door opener to 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 garagedoor control:

•within sight of the garagedoor.

•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 labelon wall next to garage door control.

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

12.Upon completion of installation, test safety reversal system. Door MUST reverseon contact with a

1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor.

13.To avoid SERIOUSPERSONALINJURYor DEATHfrom electrocution, disconnect ALL electric and battery power BEFOREperforming ANY service or maintenance.

14.DO NOTenablethe Timer-to-Close functionality if operating either one-piece or swinging garagedoors. To be enabled ONLYwhen operating a sectional door.

11

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Craftsman 139.3043 owner manual Importantinstallationinstructions, Set the Tensionand Install the SprocketCover
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139.3043 specifications

The Craftsman 139.3043 garage door opener stands out as a robust and reliable solution for homeowners looking to enhance the functionality and security of their garage spaces. This model is designed with the latest technologies and features, making it one of the preferred choices in the market.

One of the key features of the Craftsman 139.3043 is its powerful motor, which provides a smooth and quiet operation. With a lifting capacity that accommodates most standard residential garage doors, this opener ensures that users can operate their doors seamlessly without unnecessary noise. The blend of power and quiet functionality enhances the overall user experience, making it ideal for homes with bedrooms or living areas adjacent to the garage.

The opener also boasts a durable rail system, designed for easy installation and longevity. The straightforward design simplifies the installation process, enabling a typical DIY enthusiast to set it up without the need for professional assistance. Additionally, the sturdy construction of the rail system ensures that it can withstand the rigors of daily use.

Safety and security are paramount with the Craftsman 139.3043. It incorporates advanced safety features, such as the automatic reverse function, which prevents accidents by reversing the door's motion when an obstacle is detected. This feature adds peace of mind for families with children and pets. Furthermore, the built-in security technology includes a rolling code system that changes the access code each time the remote is used, thus protecting against potential unauthorized access.

The Craftsman 139.3043 is equipped with remote control capabilities, allowing users to open and close their garage doors from a distance. The remote is designed to be user-friendly, with buttons that are easy to operate. Additionally, many models include a smartphone app integration, empowering users to control their garage door via their mobile devices, providing convenience and modern accessibility.

Another notable characteristic is the vibrant LED lighting that illuminates the garage space when the door is in use. This not only enhances visibility but also contributes to the overall safety of the area, preventing accidents in dimly lit environments.

In summary, the Craftsman 139.3043 garage door opener combines power, ease of use, advanced safety features, and modern technology. Its reliable performance and user-friendly elements make it a top choice for homeowners seeking an effective solution to their garage door needs.
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