1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. 8000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Primed - 8" Adjustable Channel Up - 8,000 lbs

Demco Hydraulic Brake Actuator - Drum - Primed - 8" Adjustable Channel Up - 8,000 lbs

Item # DM8759942
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Brake Actuator
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DM8759942 - No Lockout Demco Surge Brake Actuator
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Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Adjustable up channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Weld-on application. Call 800-298-1624 to order Demco brake actuator part number DM8759942 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Hydraulic Brake Actuator - Drum - Primed - 8" Adjustable Channel Up - 8,000 lbs. Brake Actuator reviews from real customers.
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Demco Brake Actuator - DM8759942

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • 8000 lbs GTW
  • Weld-On
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Adjustable up channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Weld-on application.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Adjustable channel has 3 different mounting positions for coupler (sold separately)
    • Channel-up design allows for greater rise
  • Composite master cylinder is durable and efficient
    • Glass-reinforced nylon construction resists rust and corrosion
    • Large reservoir provides increased capacity for brake fluid
    • Automotive-style diaphragm cap creates completely enclosed system to help prevent contamination of fluid
  • Acetal copolymer lining provides smooth operation as actuator telescopes in and out
  • Breakaway included
  • Heavy-duty steel construction
  • Primed finish
  • Weld-on installation
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Channel width: approximately 3"
  • Channel height: 8"
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA91
  • 1-Year warranty


Note: Because this actuator does not include a reverse lockout, it is recommended that you equip your trailer with free-backing brakes so that you can drive in reverse without the actuator triggering your trailer's brakes.


When you apply the brakes in your tow vehicle, deceleration occurs and momentum pushes your trailer toward the rear of your vehicle. With surge brake systems, the hydraulic actuator is triggered as your trailer moves forward, once your tow vehicle starts to slow down. When this happens, the actuator contracts, applying force to its master cylinder. This in turn supplies the necessary hydraulic pressure to engage your trailer's brakes.


Adjustable Channel Design

The adjustable channel on this trailer brake actuator allows for ultimate versatility. Mount almost any type of coupler (sold separately) - from a standard ball coupler to a lunette ring or clevis attachment - to fit your specific application. In addition, the 3 mounting positions on the channel let you adjust the height of the coupler. Just place the coupler so that it matches the height of the ball mount or other hitch attachment on your tow vehicle and you will be able to tow your trailer levelly.


This actuator is great for low-riding trailers. This is because the adjustable channel is positioned so that the mounted coupler can sit above the actuator tube, allowing for a greater rise than with a standard center-mounted channel. As a result, you can line up your low trailer with your tow vehicle's hitch for a level setup. Alternatively, if you have a standard trailer paired with a lifted tow vehicle, then this channel-up design will help you achieve a level towing setup for this type of application as well.



8759942 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Up - 8,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Primed - 8" Adjustable Channel Up - 8,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Demco Brake Actuator - Surge Brake Actuator - DM8759942 Review

Speaker 1: Today we're going to be taking a look at the Demco Brake Actuator, Part Number DM8759942. This is a surge-type hydraulic actuator that activates your trailer's brakes when the tow vehicle slows down or stops. As the weight of your trailer pushes forward during braking, that will depress the actuator and activate your brakes making slowing down safer and easier.This actuator has a gross towing weight of 8,000 pounds, which is the maximum amount of weight that it can pull, and that includes the trailer and everything else you have loaded on it. And it has a maximum tongue weight of 800 pounds. That's the max amount that's pressing down at the coupler and channel here.This fits a standard 3-inch straight coupler, and it is a weld-on design. So you'd make your welds right here on either side.

It's made of a heavy duty steel and has a primed finish so it will need to be painted once it's mounted. It comes with a breakaway switch already installed. So you just clip this to your tow vehicle when you're ready to tow. In the event of an accidental disconnect, this will pull the switch and apply your trailer's brakes making it come to a full and complete stop.Now one thing to note with this actuator is that it does not include a reverse lockout. So it is recommended that you equip your trailer with free-backing brakes so that you can drive in reverse without the actuator triggering your brakes accidentally.

The channel-up design allows for greater rise, which is a nice feature if you have a trailer that has a lower height than your towing vehicle. And it has three different places to mount to your coupler, and the couplers are sold separately, but you can fine a wide variety available here at etrailer.com.Now, the master cylinder is glass-reinforced nylon to resist rust and corrosion, and the actuator has an acetal copolymer lining which provides smoother operation as it telescopes in and out. The large reservoir allows for a greater capacity of brake fluid. And to avoid any contamination, it has an automotive-style diaphragm cap that creates a completely enclosed system. So you don't have to worry about any air or other fluids getting into your system and causing damage to your brakes.This is made in the USA and comes with a one-year warranty.

And that will do it for our look at the Demco Brake Actuator, Part Number DM759942.

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Kathleen M
Video by:
Kathleen M
Employee Laura H
Updated by:
Laura H

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