bing tracking image
  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 8000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2-5/16" Bulldog Coupler - 8,000 lbs

Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2-5/16" Bulldog Coupler - 8,000 lbs

Item # DM8759802
Our Price: $385.92
Brake Actuator
Shipping Weight: 53 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Videos

Need help with installation?
Locate installers near me
Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Welds onto a 50-degree A-frame trailer. 1-800-940-8924 to order Demco brake actuator part number DM8759802 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2-5/16" Bulldog Coupler - 8,000 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (6)
  • Q & A (0)
  • Videos (1)
  • Photos

Demco Brake Actuator - DM8759802

  • Surge Brake Actuator
  • Drum Brakes
  • 2-5/16 Inch Ball Coupler
  • 8000 lbs GTW
  • Weld-On
  • No Lockout
  • A-Frame Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Welds onto a 50-degree A-frame trailer.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Bulldog Collar-Lok coupler fits tightly around hitch ball for secure connection
    • Heavy-duty design is great for utility, livestock, cargo, and construction trailers
    • Pin-style fastener holds collar in place around base of hinged ball socket
  • 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
  • Straight tube
  • Made in the USA


Specs:

  • Application: 50-degree A-frame trailers with hydraulic drum brakes
  • Ball size: 2-5/16"
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Model number: DA9550
  • 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.



8759802 Demco DA9550 Hydraulic Trailer Brake Actuator for Drum Brakes - A-Frame - 2-5/16" Ball Bull Dog Coupler - 8,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2-5/16" Bulldog Coupler - 8,000 lbs

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 - Surge Brake Actuator - DM8759802

Hello, neighbors and friends. Welcome back. I'm Steven. This is gonna be a look at our Demco hydraulic brake actuator for drum brakes. It's got a prime finish, and it's what they consider an A-frame style coupler. So again, it's a hydraulic actuator, and that's gonna activate your trailer's brakes when your tow vehicle slows or stops.

It's got what's called a bulldog style or collar lock style coupler. It's gonna fit tightly around the hitch ball for a secure connection. And as far as that goes, if you've never seen one of these, I'll go ahead and pull a ball out from around the table here and show you a simple demonstration. Simply pull the pin out. Now, this collar is spring-loaded, so when I pull that, this other latch here will pop open.

You can kind of see it there, and the ball simply goes up in place. And then once you get that 2 and 5/16th ball on there, you just simply push that close, and it's gonna automatically lock in place. And I'll kind of spin that around there, show you that a little better maybe. And then as far as getting the ball unhooked, obviously, this will be on your ball mount, once you've got that collar and pull it back, it's gonna automatically open, thus releasing from the ball itself. Now I'm gonna go ahead and close this back up here and put the pin back.

Very simple operation, very easy to use. Now, taking a closer look, again, I talked about that pin holder, that's gonna hold that collar in place and keep it from opening when you don't want it to. That's got a nice, large reservoir back here. That's gonna provide increased capacity for your brake fluid. There's a back view of that whole assembly.

And it's got a nice glass-reinforced nylon construction. That's gonna resist rust and corrosion. It's got this nice automotive style diaphragm cap. That's gonna create a completely enclosed system, and that's gonna help prevent contamination of your fluid. It's got a nice rubber seal on there. Now, as far as this guy sliding in and out and actuating whenever you're using it, 'cause if you don't know, when you hit your brakes on this style of brake actuator coupler, this piece will kinda compress inside of here, and thus pushing the fluid to those drum brakes. Now, it has what's called an acetal coal polymer lining on here, and that's gonna give you a nice, smooth operation as the actuator telescopes in and out from this assembly. Again, the breakaway cable is included. It's got a nice reach on it there. I'm even outta the view over here, that's how long it is. It's got a nice safety cable chain hookup here. Put that on the same spot where you put your safety chains for the trailer. God forbid you have a brake bleed, but if do, basically that's gonna pull this latch, which will then automatically send the fluid to the brakes, locking 'em up to stop you safely. That's a simple reset, you just push it back in place when everything's fixed and ready to go, and it's ready to go again. It is a nice heavy duty, nice, steel construction. Beautiful polished prime finish rather here. It looks kinda polished, it's shiny, but it's a prime finish, you can paint it whatever color you want. It's a weld-on application, so you would weld this onto your trailer frame. It's a straight tube up here. Again, A-frame shaped down below. It is made in the USA. It's got what's considered a 50 degrees A-frame. And again, it works with hydraulic drum brakes. It has a nice one-year warranty. And if you're matching up models, it is considered a model D95050. It is rated 8,000 pounds capacity and 800 pounds tongue weight. All that is also stamped on top of the coupler head over here, which you can't see right now 'cause of the angle, but it's all stamped on there as well. So a very nice product. Demco makes really nice couplers and actuators, and they're kinda well-known in the trailer scene. Well, again, I'm Steven with etrailer.com. Hope all this information's been helpful for you. I hope if you're making a decision to go from electric to hydraulic brakes, keep in mind, you do have to get all your brake lines, the brake drums, all that kinda stuff, and you can find all that information as well on etrailer.com. Stay safe out there as always, have fun installing, and I'm Steven, have a great day.

Customer Satisfaction Score:


Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2-5/16" Bulldog Coupler - 8,000 lbs - DM8759802

Average Customer Rating:  5.0 out of 5 stars   (6 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Welds onto a 50-degree A-frame trailer.

by:

The product was just what I expected. The real story was that etrailer had a delay in shipping due to a manufacturer issue. Etrailer stayed in constant contact with me and made sure I was up to date on every stage of the order. AAA+ service...!!!



by:

Product has met my expectations. The customer service at etrailer is fantastic.



by:

far superior to what it is replacing. well constructed, fast shipping.
Thanks again for supplies a quality product keep it up!



by:

this hitch was by far beyound my expections they will get most of my business

Alex F.

9/10/2020

12.500 clamshell surge works execellent thks



by:

You did a great job and we received it very quickly. Thank you.



by:


6
6

See what our Experts say about this Demco Brake Actuator


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Steven C
Installed by:
Steven C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.