LiftMaster LA400DC Primary Replacement Arm with 6ft. Cable Attached | 24VDC


Brand: LiftMaster

Original Price: $619.98
Price: $469.47
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    Description Top of Page

24VDC Residential Linear Actuator Primary Arm

Replacement LA400DC Primary Arm for LiftMaster LA400DC.

ONLY includes the arm (with 6ft. cord attached), not the control box. 

The manufacturer suggests that the product be professionally installed


The LiftMaster / Chamberlain LA400 Gate Opener is a residential and light commercial linear actuator.

  • Gate Materials: Wood, Steel, Aluminum, Vinyl, Chain Link, and others.
  • Weight and length: Up to 16' in length OR 850 lbs.
  • Max degree of opening: 100°
  • Gate Post or Column size (pull to open ): Max 7" x 7" post or gate mounted 4" from the rear face of a column.
  • Push to Open: Yes, setback above does not apply (Not Included)
  • Solar Compatible: Yes
  • Power: 120V Single Phase (Standard control box).
  • Power Wire: 120Vac
  • Power Wire: 24Vac Transformer
  • Operating Temperature: -4°F (-20°C) to 140°F (60°C)

GateCrafters.com offers more expert assistance than anyone.
If you need help deciding if this gate opener has the abilities that are right for your gate we have live application specialists available 9am - 9 pm EST 7 days a week or try our exclusive gate opener recommendation tool 24 hours/day.

    Compatibility Top of Page

    Features Top of Page

  • LARGE, 24V MOTOR - It is one of the largest swing gate motors available for any residential estate gate opener. It is capable of handling driveway security gates up to 850 lbs., which is more than many heavily ornamented electric gates weigh.

  • CONTROL BOARD, EASY READ DIAGNOSTICS - The LED light diagnostic on the control board permits easy diagnostics of problems or missing connections. This allows efficient repair and swift continuation of normal electric gate operation.

  • SOFT START/SOFT STOP - Soft start/soft stop is a feature in which the control board, during the set up process, learns where the opening and closing points are for the swing of the gate. Then during normal operation the gate operator automatically slows the motion of the gate to smoothly meet with the gates destination point. This reduces stress on the gate and operator for extended functionality.

  • BI-PART LATCH - Designed to allow one gate leaf to begin opening or closing independently for those gates that have overlapping leaves.

  • ADJUSTABLE CLOSING TIMER - Set your gate to close between 0 and 120 seconds after reaching the full open position.
  • ELECTRONIC LIMIT SWITCHES - Set the limit switches with just the push of a button for accurate, easy setup.

  • ON BOARD RADIO RECEIVER - It is compatible with a number of wireless remotes and allows operation of a number of devices with one remote - such as the garage door and the gate opener.

  • INPUT TERMINALS - For convenient addition of accessories requiring like loops, sensing devices and controlling devices.

  • QUICK. SAFE AND SECURE MANUAL RELEASE - The LA-400 operator comes with a manual release key that can be used should the power fail and the backup battery is not charged. This ensures that the driveway gate can be opened without damaging or disconnecting any components.

  • HIGHEST LEVEL OF SAFETY - This operator is designed with separate force adjustments for obstructions. If the gate meets an obstruction while it is opening it will reverse to close, and if it is closing it will reverse to open. Additionally, the LA-400 is UL 325 Listed.

  • INCREASED CONVENIENCE - The built in MyQ system will allow you to open your gate right from your smartphone.

  • SOLAR-READY ULTRA-RELIABLE SYSTEM - Simple solar conversion delivers power when you need it most and is extremely power efficient at all other times to maximize solar performance.

  • WIRELESS DUAL-GATE COMMUNICATION - Eliminates expensive conduit costs and unsightly driveway scars.

  • PROGRAMMABLE AUXILIARY RELAYS - Easily add additional features, such as warning lights/alarms.

  • ANTI-TAILGATE - Prevents unauthorized access. Gate will pause when closing as vehicle pulls onto interrupt loop or breaks photo beam. Once vehicle backs up, gate will continue to close.

  • HOMELINK® COMPATIBLE - Version 4 and higher.

  • COMMERCIAL-DUTY CAST ALUMINUM HOUSING WITH HEAVY-DUTY DC MOTOR - Powerful enough to perform in the most demanding applications

  • KEYED MANUAL DISCONNECT - when unlocked, allows gate to be operated manually.

  • INHERENT REVERSING SENSOR - detects obstructions or increased loads. Reverses gate when closing or stops/reverses the gate when opening.

  • FIRE DEPARTMENT COMPLIANCE - allows gate to auto open upon loss of AC power or battery depletion

  • SURGE SUPPRESSION - provides industrial surge and lightning protection against strikes up to 50 feet away.

  • PARTY PASS - allows for the gates to be held open for an extended period of time, ideal for parties.
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GateCrafters.com has the resources you need. How do you use your gate opener system once you get it? GateCrafters.com is the only retailer to give a real answer to this question. We have develop videos for installing many of our gate openers and products and write DIY focused manuals for most gate openers and have individual instructions for each accessory to be installed with each gate opener.
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    Specifications Top of Page

Dimensions: 4.5" (H) x 37.4 (L) x 4 (D)

Weight: 13.2 lbs. 

Arm extends up to 53.5"

    Included Top of Page

Includes the LA400DC Primary Replacement Arm (with a 6ft. cable attached)

No Control Box

    D⁣IY Installation Top of Page

<span data-src='/glossary_detail.aspx?id=10851' class='hovertxt'>DIY</span> Install

For over a decade GateCrafters.com has been the premier online retailer of gate openers and gate opener accessories. Because of our extensive technical and installation knowledge, we are authorized to sell to the DIY market. You can access our trained technical staff 7 days a week from 9 am to 9 pm, EST. When you DIY install your gate opener system, you will save $1000s of dollars over the life of your gate opener. You will have working knowledge of your gate opener installation and how the gate opener works. This will make it easier for you to troubleshoot your system and perform routine maintenance, if needed in the future.

GateCrafters.com is the DIY factor.
GateCrafters.com further adds to most of our gate openers for easier DIY installation. We have developed exclusive components (example: easy adjustable mounting brackets), customized instructions, and offer a full spectrum of accessories to truly cover all aspects of the installation of your gate opener. In addition we have the largest staff of factory trained technicians in the US.

    DIY Additions Top of Page
  • Order specific customized accessory wiring instructions
  • 360 degree accessories - we can take you through exit, entry, safety, power, and all other minute details to create a fully rounded kit.
  • Free 24/7/365 Installation Support
  • Free 7 day/week Technical Support
  • Largest Number of Certified Techs in America
  • Free assistance to find the right gate opener for your gate
  • Free systems design assistance to match the right accessories to fit your needs.
  • Extremely competitive pricing
  • Free shipping on all accessories purchased with a gate opener
  • We stock replacement parts
  • Many brands of many types of accessories, enough to handle just about any operational situation you can imagine

GateCrafters.com has actual experience.
We have a testing area, we have factory and internal training courses, we build gates and have our own gates that are automated, we attended all industry trade shows in multiple countries and are a member of the AFA, and we pay visits to our chosen manufacturers' factories. All these factors are what have lead to us having so many exclusive additions. When you see and actually use as many products as we have you tend to have many ideas for minor changes that have major impacts. We acted on these ideas and have utilized them to help thousands of customers automate their gates.

    Tools & Supplies for Installation Top of Page

The following tools and supplies are suggested in the manufacturer manual for optimal installation. They are not provided by Gate Crafters, however, most tools are available at local hardware stores for purchase or rental.

Please refer to the Installation Manual for Tools Needed.

Depending on the type of gate, power supply and contributing environmental factors additional tools or supplies may be needed. Please review the product manual associated with this gate opener model for further details.

    Customer Testimonials Top of Page

Be the first to write a testimonial for this product. Please send them to Testimonials@GateCrafters.com.

    Product Media Top of Page


Manual: LiftMaster Model LA400PKGUL Product Guide
Manual: LiftMaster LA400UL Installation Manual
QB ID: LA400DC

   Dynmaic FAQ
What are the advantages of DC over AC?
With a DC opener you don’t need an electrician to install it, is it safer because it is low voltage, and power is more readily available through everyday outlets.
What is the range of use for the automatic driveway gate opening transmitters?

The range of use for the automatic driveway gate opener transmitters would vary for each automatic driveway gate opener installation; varying on model installed and external factors. 

The Estate Swing automatic driveway gate openers generally have a range of approximately 300 feet for the automatic driveway gate opener transmitters that comes with each system. .

The published range for GTO and Lift Master radio controls is 50-100 feet, and must be used in line-of-sight of the gate for safety purposes.

The Apollo automatic driveway gate openers generally have a range of approximately 300 feet for the automatic driveway gate opener transmitters that comes with each system (when bought from GateCrafters.com).

How should I run my wire to my automatic gate lock?
It runs from your control panel. What we suggest is running it along a vertical bar on the gate. You can use zip ties to hold it to the back, matching the color of the zip ties to that of your gate.
Which automatic driveway gate opener to use with a wood gate?

Privacy fences usually don't work well with swing automatic driveway gate openers because the solid surface acts as a "sail" in the wind. 

This adds strain to the motor of the automatic driveway gate opener and generally trips safety sensors that are a part of all automatic driveway gate opener systems. Either you can use an automatic slide driveway gate opener or you would have to manually operate a swing driveway gate opener in windy conditions. It would also be recommended to use an automatic driveway gate lock to lock your driveway gate shut in the closed position. This takes pressure off of the automatic driveway gate opener’s arm when the wind pushes against the driveway gate.

The easiest automatic driveway gate opener to manually operate would be the Estate Swing E-S 1600/1602 automatic driveway gate opener. The Estate Swing E-S 1600/1602 automatic driveway gate opener has a key release on the top that releases the gears and allows the driveway gate to be moved manually without having to remove the automatic driveway gate opener.

Is my credit card safe?
We use SSL to protect your information when you send your credit card information to us. SSL is widely used by e-commerce web sites to protect information from being tapped. We don't save your credit card information on our web site. So nobody can steal it from us. Part of your credit card information is stored in VeriSign's system. There are two advantages. First, VeriSign is the leading company in web security. They have experts and state of art technology to protect your information. Second, even we cannot see your complete credit card number. That adds more security to your credit card information.
I could not add products into shopping cart. Why?
If you cannot add any product into shopping cart, that is because you disabled cookies in your browser. Almost all shopping carts use cookies. Ours does too. If you added some products in and they disappeared, that is because you haven't interact with web site for a fairly long time and the cookies expired. Expiration is for your privacy and safety.
What should I do if my SL1000 is slightly off after concreting it in place?
You can make slight adjustments by taking it off it posts when you remove the bolts. Slide in slivers of wood between the frame and the posts and reattach the bolts. This will make it adjustable to the slight change you need.
What shipping methods do you use?
We offer any method of your choice. Typically we ship all driveway gates via Fed-Ex Freight. We combine the use of UPS, USPS and Fed-EX ground services as our standard shipping method.
What are your gates made out of?
We use a ultra high grade aluminum alloy material in the construction of our driveway gates. This allows for high durability and strength in an ultra light gate.
Do I need to lubricate my gate opener arm?
We do suggest lubricating your arm once per month with a silicon spray. This will assure your arm opens smoothly and reaches its maximum lifetime.
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