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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel
  6. 20000 lbs GTW
Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 20K
Demco

Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 20K

Part Number: DM5541
$426.73
Brake Actuator
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Designed for fabricating a complete trailer brake actuator to your specifications, this unassembled, unprimed surge-type actuator comes without a coupler or channel. Features a durable composite master cylinder. Includes breakaway. 1-800-940-8924 to order Demco brake actuator part number DM5541 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 20K. Brake Actuator reviews from real customers.
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  • Reviews (3)
  • Q & A (0)
  • Videos (1)

Demco Brake Actuator - DM5541

  • Surge Brake Actuator
  • Drum Brakes
  • Channel
  • 20000 lbs GTW
  • Weld-On
  • Farm Trailer
  • Construction Trailer
  • No Lockout
  • Demco
  • 3 Inch Channel Tongue

Designed for fabricating a complete trailer brake actuator to your specifications, this unassembled, unprimed surge-type actuator comes without a coupler or channel. Features a durable composite master cylinder. Includes breakaway.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
    • Add on or fabricate a coupler to create a custom actuator that fits your needs
  • Unassembled and unprimed for quick and easy welding
    • Welding while unassembled prevents damage to internal components
  • 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
  • Breakaway lever activates your trailer's brakes if the trailer disconnects from the tow vehicle
    • Snap hook on safety cable ensures secure connection to lever
  • Acetal copolymer lining provides smooth operation as actuator telescopes in and out
  • Heavy-duty steel construction
  • Weld-on installation
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Gross towing weight: 20,000 lbs
  • Maximum tongue weight: 2,000 lbs
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA20
  • 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.


Unassembled and Unprimed

Because welding can cause damage to the internal components, this actuator comes unassembled and unprimed for your convenience. No need to waste time taking apart an actuator or risk losing important parts. Once you have the actuator welded in place, prime and paint it to match your application.




5541 Demco Hydraulic Brake Unassembled Actuator - Drum - Raw - 20K

Installation Details DM5541 Installation instructions


California residents: click here


Video of Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 20K

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




Video Transcript for Built to Launch, Built to Last: Demco Breaks Down Their Surge Brake Actuators

Hello, neighbors, it's Brad here from etrailer and today I'm in Boyden, Iowa at the Demco headquarters and manufacturing facility where we got to see Demco products made. And these are all products that I handle on a daily basis when doing flat tows, fifth wheels, or even couplers. They cover so many different towing products and they have plenty of experts here to break down some of their products a little bit more to give you some understanding as well as allow me to ask those questions on products that I handle every day. So, Carter, what do we have here So, this is DA86 brake actuator model. This one is designed for disc brakes. We do also offer for drum brakes, as well, depending on what your trailer actually has on itself.

The nice thing about our actuators, they are all hydraulic-based, so they are all inertia-based. As you back up with the trailer, the brakes are applied as you back up and then going forward, obviously, when you come to a stop, the inertia on the inner slide tube itself will engage this as it's necessary. That will allow the brake fluid inside of the master cylinder reservoir here to go throughout the brakes. Brad So, what's the typical application for this So, this one here, this would be on smaller utility trailers, marine trailers, boat trailers. Obviously, with that as well, the plated finish here, a lot of marine applications will use that to prevent rusting.

That's kind of the main user for this. This is a light duty, so this is actually rated at 8,600 pounds. We do offer anything from 7,000 up to 20,000-pound actuators. So if I'm adding this to a trailer or replacing an old one, what's installation look like Yeah, so this one itself is a standard three-hole application. A lot of OEMs out there, trailer manufacturers out there, will have this standard three-bolt system on it.

We do have weld-on features, as well. A-frame options, definitely depends on what your trailer has as far as the application goes. We do kind of pride ourselves on flexibility with mounting applications, as well. So, it's designed to mount on a standard three-inch tongue, that's kind of industry standard out in the market. Basically, with this one, obviously, you'll have those three bolts that will allow you to take your existing one off, put this one on and away you go.

This red tab is catching my attention. I'm assuming that this is a lockout It is, you are correct, yes. So, most disc brake actuators will come standard with an electric lockout on the backside. Usually you have either a bypass solenoid or an inline solenoid that will just have two wires connecting to it. One's a power, one is a ground source. If there is a case where the ground is not proper, the solenoid isn't functioning like it's designed to, this is where this manual lockout comes into play. The nice thing with that, basically, all you would have to do in a standard situation, it would be down like that, flip the tab up. As soon as you back up, that does not allow for this inner slide tube to move in and apply those brakes. And then as soon as you pull forward with this, this tab would actually fall out of the way, that'll allow you to go in a normal state. Brad So, a nice little backup plan in case electronics aren't working, which I can imagine marine applications is probably one of those Right, yes, absolutely. So, obviously you wanna get your boat in the water. Best way to do that is to, obviously, backup with that. You don't wanna have the brakes apply when you do that. Obviously, it is a frustrating situation when the solenoid isn't working like it's designed to. So that's definitely a nice feature that that manual lockout comes into play. We got to see this manufactured today. Family-owned company here in Iowa, made in the US, so a great product. Carter, thank you for taking the time to show us your surge actuator. Yeah, thanks for stopping over. Appreciate it.

Ratings & Reviews

4.7

3 reviews
Designed for fabricating a complete trailer brake actuator to your specifications, this unassembled, unprimed surge-type actuator comes without a coupler or channel. Features a durable composite master cylinder. Includes breakaway.

by:



by:



by:

Super easy installl into existing box. For me there was no welding. All parts were perfect fits and


3
3

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Dustin K
Video Edited:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Written by:
Amanda M

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