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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. 20000 lbs GTW
Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 8" Adjustable Channel Center - 20K

Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 8" Adjustable Channel Center - 20K

Item # DM6049
Our Price: $401.94
Brake Actuator
This item qualifies for Free Shipping
Shipping Weight: 61 lbs
Quantity: 
In Stock
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Surge-type actuator comes unassembled, unprimed, and ready for welding. Features a durable composite master cylinder. Adjustable channel center lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Includes breakaway. 1-800-496-5010 to order Demco brake actuator part number DM6049 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 - 8" Adjustable Channel Center - 20K. Brake Actuator reviews from real customers.
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Demco Brake Actuator - DM6049

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • 20000 lbs GTW
  • Weld-On
  • No Lockout
  • Fabrication Coupler
  • Demco

Surge-type actuator comes unassembled, unprimed, and ready for welding. Features a durable composite master cylinder. Adjustable channel center lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Includes breakaway.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Unassembled and unprimed for quick and easy welding
    • Welding while unassembled prevents damage to internal components
  • Adjustable channel has 3 different mounting positions for coupler (sold separately)
    • Channel-center design allows for greater drop
  • 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
  • Channel width: approximately 3"
  • Channel height: 8"
  • 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.


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 tall trailers. This is because the adjustable channel is positioned so that the mounted coupler can sit below the actuator tube, allowing for a greater drop than with a standard center-mounted channel. As a result, you can line up your tall trailer with your tow vehicle's hitch for a level setup.



6049 Demco Hydraulic Brake Unassembled Actuator - Drum - Raw - 8" Adjustable Channel Center - 20K

Installation Details DM6049 Installation instructions



Video of Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 8" Adjustable Channel Center - 20K

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




Video Transcript for Review of Demco Brake Actuator - Unassembled Surge Brake Actuator - DM6049

Hello, everybody, this is Jeff at etrailer.com. Today, I'm gonna take a look at this Demco Unassembled Hydraulic Drum Brake Actuator with the eight inch adjustable channel center position, and has a 20,000 pound gross towing weight capacity. Now this actuator will come unassembled and unprimed for your convenience. And basically because welding can cause damage to the internal components. There's no need to waste time having to take apart your actuator, or risk losing important parts. Once you have this actuator all welded in place, primed and painted to match your application, you can put it all back together.

Now, this is a hydraulic actuator. It'll activate your trailer's brakes when your tow vehicle slows or stops. Basically, what happens is when you apply the brakes in your tow vehicle deceleration occurs, and the momentum will push your trailer toward the rear of your vehicle. And with the surge brake system, the actuator is triggered as your trailer moves forward. Once your tow vehicle starts to slow down.

And when this happens is the inner portion right here that slides in the outer portion this actuator will contract and then master cylinder which will be installed back here will apply force to the master cylinder and this in turn supplies, the necessary hydraulic pressure to engage your trailer's brakes. Want to zoom in on some of the parts here. Over here they have the acetal copolymer lining. This provides a nice, smooth operation as your actuator telescopes in and out. This basically will go on the inside of the outer casing and then allow this to go in and out smoothly.

This does have an adjustable channel we mentioned right here, this has three different mounting positions for your coupler. Now the coupler is not included. We do sell that separately. The high thermis this channel, we measure it's gonna be right at eight inches tall. The inside width of the channel is three inches.

Now this is a heavy duty steel construction has a nice raw finish to it. So it is all ready for welding. The master cylinder right here. It is a composite master cylinder. It's very durable and efficient. It's made of a glass reinforced nylon construction resist rust and corrosion. You notice has a very large reservoir provides increased capacity for the break fluid and up at the top is a standard automotive style diaphragm cap which creates a completely enclosed system to help prevent contamination of your break fluid. Now, this does also offer the breakaway cable and hook is all included. Now this part is required by law and the reason is it'll prevent a trailer runaway situation. What this does is this cable that attaches to the lever that'll be in the brake actuator and then you have your hook and keeper right here. This'll attach after you attach your trailer to your tow vehicle then you attach this cable with the hook to the tow vehicle also. And by chance, if this trailer would come disconnected from your tow vehicle, that cable would pull on the lever which again would activate the master cylinder. And then the pressure applied to the brakes to stop a trailer in a runaway situation. We mention it's a well done installation. It is designed to mount to a straight three inch wide trailer tongue. These parts are made in the USA application. This is for trailers with hydraulic drum breaks. The gross towing weight capacity is 20,000 pounds. Maximum tongue weight capacity is 2,000 pounds. And one last note I do wanna mention is because this actuator does not include a reverse lockout. It is recommended that you equip your trailer with either a reverse lockout solenoid that usually installs onto the brake line that goes into your master cylinder. Or you can get, make sure you have free backing brakes on your trailer so that your trailer can drive in reverse without the actuator triggering your trailer's brakes. But that should do it for the review on this Demco Unassembled Hydraulic Drum Brake Actuator with the eight inch adjustable channel center position and a 20,000 pound gross towing weight capacity..


Customer Reviews

Demco Unassembled Hydraulic Brake Actuator - Drum - Raw - 8" Adjustable Channel Center - 20K - DM6049

Average Customer Rating:  4.0 out of 5 stars   (1 Customer Reviews)

Surge-type actuator comes unassembled, unprimed, and ready for welding. Features a durable composite master cylinder. Adjustable channel center lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Includes breakaway.

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See what our Experts say about this Demco Brake Actuator

  • Dimensions of Demco Unassembled Hydraulic Brake Actuator # 6049
    The Demco Unassembled Hydraulic Brake Actuator - Drum - 20K # DM6049 will have the housing that is 19-3/4 inches long by 4 inches wide by 6 inches tall according to my contact at Demco. The overall length including the actuating channel would extend to an overall 24 inches. This will be the same as the preassembled options for Demco 20K Systems. We don't have one that is exactly 16 x 4 x 6, so you will need to make minor modifications or just have the actuator stick out farther from...
    view full answer...
  • Trailer Surge Brake Coupler Operation
    I am not sure what surge coupler you have on your ditch witch trailer, but I think I can help with the function. Surge brakes use the momentum of the vehicle and the hitch ball to activate stopping by pushing against the plunger of the master cylinder inside the coupler. This is like hitting a brake pedal. The amount of force is transferred into the braking pressure of the hydraulic brake system. So when pulling it has no pressure (like having your foot off the brake pedal) and when...
    view full answer...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Amanda M
Written by:
Amanda M
Employee Carrie F
Updated by:
Carrie F

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