LiftMaster 3950 Jackshaft Operator for Rolling Sheet Doors Installation

Liftmaster 3950 for Rolling Sheet Doors Installation
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The LiftMaster 3950 Jackshaft Operator is designed for rolling sheet doors intended for commercial use only and ideal for self-storage facilities. The maximum door size doesn’t exceed 12 ft. tall and 14 ft. wide. Additionally, the door must not exceed 168 sq. ft. and cannot surpass 650 lbs. The maximum suggested and recommended duty cycle for this door is ten cycles per hour. As for its features, the operator includes two door sprockets for dead and live shafted doors, a six-foot power cord, push button limit settings, and a smooth starting and stopping motor.

Aside from knowing the features and specifications of the product, you should also know how to install this in your place. For that, here is a step by step installation guide.


1. First thing to do when you install the operator is to assemble the parts. And to do that, you have to attach the drive sprocket on either the left or right side of the operator depending on your installation. The drive sprocket has three holes for the alignment with the door sprocket.
To do this, you need to insert the drive sprocket into the output shaft. Align the center holes next in the drive sprocket with the hole in the output shaft and insert bolts into them. Tighten the bolts using your fingers.
2. Attach the mounting brackets next. The operator can be mounted to the wall using the mounting brackets provided. Position two mounting brackets on each side of the operator and then, fasten them to the operator using the self-threading screws (8) provided.

Liftmaster 3950 Jackshaft Operator for Rolling Sheet Doors


The following installation instructions are general. You can refer to your door manufacturer for specific directions for your door.

1. Install the door sprocket. This step differs between live shaft type of door and the dead shaft type.

a. For the live shaft type, slide the door sprocket first onto the end of the door shaft. And then, mark and drill a hole through the door shaft. Lastly, attach the door sprocket to the door shaft using the through bolt and nylock nut. Take note that the drive shaft must extend 1-1/2” beyond the door support bracket.

b. For dead shaft type, slide the door sprocket onto the end of the door shaft first. Slide the through bolts and flat washers into the door sprocket next with tubular spacers and then attach it to the door drum. Finally, secure the sprocket to the drum.

2. Mount the operator to the wall with the mounting brackets provided.

  • Fasten the operator to the mounting surface using appropriate hardware. Anchors must be fastened to structural members only. Use concrete anchors for masonry construction.

First, raise the operator to an approximate position, ensure the drive sprocket is aligned with the door sprocket. Next, wrap the chain around the door and drive sprockets. Connect the ends of the chain using the master link provided. You can raise or lower the operator until the chain isn’t tight. Make sure the operator output shaft is parallel to the door shaft and the sprockets are aligned. Secure the operator to the wall with an appropriate hardware. Lastly, tighten the drive sprocket bolts using a 5/32” Allen wrench.

3. Attach the emergency release rope and handle by threading one end of the rope through the hole in the top of the red handle so the “NOTICE” signage reads right.

Secure it with an overhand knot at least an inch from the end of the rope to prevent slipping.

And then, thread the other end through the loop in the emergency release cable. Adjust the length of the rope.

4. Install the single button control station. First, you have to remove the control station cover. Afterwards, fasten the control station to the wall at least 5 ft. above the ground. Ensure the installation surface must be smooth and flat. Next, select the appropriate knockout and run the wires towards the operator. Connect the wires to control the station and replace the control station cover. Fasten the warning placards on the wall.

5. Electrical requirements. In order to avoid or reduce the risk of electric shock, the operator has a grounding type plug with a third grounding pin. The plug will only fit into a grounding type outlet. If permanent wiring is required, refer to your technician for installation.

6. Lastly for the installation process is to install the protector system. The safety reversing sensor must be connected and aligned properly before the door operator will move in the down direction. This is a must-have device and must not be disabled. Install the sensor in a position not exceeding 6” above the ground.

These are the simplified form of the installation guide of LiftMaster 3950 Jackshaft Operator. If you want to read on for the adjustment, operation, programming, and repairing procedures, you can look for it on your search engine.

Now that you have an operator, you will need an accessory of your choice to control the opening and closing of your garage door. However, this article will specifically talk about the top 3 remote openers which are compatible with the Model 3950 operator.

1. LiftMaster 371LM Garage Door Opener 315 MHz

LiftMaster 371LM Garage Door Opener

This garage door opener works with programmable codes using purple LED light with over a billion codes with rotating technology. This accessory’s package includes a visor clip or key ring with a lithium battery of 5 years battery life. It also offers Enhanced Radio Technology for increased transmission and detection of communication signals.

2. LiftMaster 372LM Garage Door Opener 315 MHz

Liftmaster 372LM garage door opener

This remote-control feature two buttons controlling two garage doors as well as turning lights on/off. A different code is sent to the device every time you use it. It uses a 315 MHz frequency, over a hundred billion codes rotating technology. It also features ERT and is inclusive of a visor clip and lithium battery with a five-year battery life.

3. LiftMasterr 373LM Garage Door Opener

Liftmaster 373LM garage door opener

The LiftMaster 373LM Garage Door Opener is a three-button visor size remote that works for the new 2005 to 2014 garage doors by LiftMaster. It has a single button used as a transmitter using code rotating technology. This code rotating technology is safe to use since it has no capability of interfering with the military. It also has inclusions of a 5-year 3V lithium battery, and a directional visor clip.

Overall, the Liftmaster 3950 Jackshaft Operator is a great choice when in need of a remote-controlled commercial garage door. It is compatible with various remote controls and it can be easily installed in your place so long you have the appropriate tools and you follow the instructions accurately, and safely. When installing the operator, practice safety warnings. Follow these safety instructions from your manual to prevent injuries.

Related post:
LiftMaster Gate and Door Operators Product Information

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