bing tracking image
  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Disc Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 8000 lbs GTW
Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2-5/16" Ball - 8,000 lbs
Demco

Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2-5/16" Ball - 8,000 lbs

Part Number: DM8758811
In Stock
$334.58
Retail:$416.92
You Save: $82.34
Brake Actuator
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

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

Need help with installation?
Locate installers near me
Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. eZ-Latch coupler mechanism makes hookup a snap. Bolt-on application. 1-800-940-8924 to order Demco brake actuator part number DM8758811 or order online at etrailer.com. Free expert support on all Demco products. Great prices and Fastest Shipping for Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2-5/16" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (28)
  • Q & A (0)
  • Photos

Demco Brake Actuator - DM8758811

Highlights

  • No Brake Controller Needed: Surge design activates disc brakes automatically as you slow.
  • Fast Hookups: eZ-Latch lets you drop on the 2-5/16" ball and it locks itself.
  • Built for Heavy Loads: Handles up to 8,000 lbs GTW and 800 lbs tongue weight.
  • Perfect for Use Around Water: Zinc plating with 200-hour salt rating resists corrosion.
  • Smooth, Reliable Braking: Composite master cylinder and acetal lining ensure steady action.
  • Easy Bolt-On Fit: Mounts on a 3"-wide tongue with a built-in 4" drop to match trailer height.
Made in USA

Features to know about

Easy Hookups Every Time: eZ-Latch Coupler Design

Connecting the trailer is simple with the eZ-Latch coupler. You don’t have to lift or hold the latch open—just lower it onto the 2-5/16" hitch ball and it snaps into place automatically. It’s a clean, one-step hookup that saves time and keeps the connection secure when you’re ready to tow up to 8,000 lbs.

Close-up of Demco eZ-Latch trailer coupler showing how it automatically secures over a hitch ball for easy connection.

Smooth Braking Without a Brake Controller: Surge-Type Operation for Disc Brakes

This actuator uses surge pressure to activate your trailer’s hydraulic disc brakes when the tow vehicle slows down. You don’t need an external brake controller or extra wiring. The actuator telescopes in and out smoothly thanks to an acetal copolymer liner, giving you consistent braking power with less jerk or noise on the road.

Built to Last: Zinc-Plated Steel with Composite Master Cylinder

The heavy-duty steel body has a zinc coating rated for 200 hours of salt spray, which helps protect against rust when used around water or road salt. Inside, the composite master cylinder is made from glass-reinforced nylon that won’t pit or corrode like metal. Together they keep performance steady even after years of use.

Matched Height and Reliable Fit: 4" Drop and 3" Channel Mount

The built-in 4" drop helps you line up the coupler height with your tow vehicle for a level setup. It bolts right onto a 3" wide trailer tongue using standard 1/2" × 4-1/2" Grade-5 bolts (not included). That makes it an easy replacement for many older actuators while maintaining a solid, factory-style fit.

Added Safety on the Road: Built-In Breakaway System

The integrated breakaway cable and snap hook are designed to engage your trailer brakes if it ever separates from the hitch. It’s a simple safeguard that works automatically, helping protect your load and giving you extra peace of mind every time you tow.

Specs

Application

  • Application: trailers with hydraulic disc brakes
  • Designed to bolt on top of a: 3" wide trailer tongue
  • Bolt size: 1/2" x 4-1/2" Grade-5 bolts (not included)
  • See below for: bolt pattern dimensions

Technical dimension diagram showing the 3-hole standard bolt pattern and measurements for the Demco hydraulic surge brake actuator model DM8758811.

Weight and Capacity

  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs

Dimensions

  • Ball size: 2-5/16"
  • Drop: 4"

Model Information

  • Model number: DA91
  • Warranty: 1-Year warranty

Note

  • Compatibility note: This actuator is compatible with the Demco manual reverse lockout kit (DM5939). If you choose not to add the 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.

8758811 Demco DA91 Hydraulic Trailer Brake Actuator for Disc Brakes - 2-5/16" Ball Easy-Latch Drop Coupler - 8,000 lbs





Customer Satisfaction Score:

Ratings & Reviews

4.9

28 reviews
Review sort icon
Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating with a 200-hour salt spray rating. eZ-Latch coupler mechanism makes hookup a snap. Bolt-on application.

by:



by:



by:



by:



by:

Very helpful and got the right answers and part



by:

Correct part, easy to install. Great quality! Helpful staff to determine what I needed!



by:

Needed this product ASAP to fix a trailer that needed to be back on the road. Received on time as promised and worked amazingly well. Thank you so much for saving my butt! Keep up the great work!



by:

everything worked just as advertised. installation was pretty striate forward. I had to make a few changed to hydraulic lines but all worked fine.



by:

The products I received were of good quality and were bolt on replacement for what was originally on my trailer. Very pleased.



by:

Perfect fit. I replaced an old DA 91. Shipped fast and i sturdy packaging. Thank you ETrailer!!



by:

Did not fit my trailer tong as it was not 3"sq. Quality of product is good, E trailer service is fantastic great people to work with, arrival time was as stated. My trailer Is not standard and brake assembly is no longer made for this tong. They did make some suggestions but I was able to find another supplier who had rebuild kit. The cost was much higher. Returns were easy. I use e-trailer as my first go to.



by:



by:



by:



by:



by:



by:



by:

good



by:

Grteat Service and fast shipping



by:

Good Item



by:

very little use so far but all is working good I am very happy with my purchase



by:

The product is awesome as is everything I have purchased from you in the past. As for the packaging...less than adequate by far. Luckily the product wasn't damaged. The box was destroyed and had been taped up by (I'm assuming) the carrier. No harm, no foul but putting a heavy object with sharp edges loosely in a box will never fare well. Packaging dept. needs a slap!



by:

Order part and came in a timely matter. This is the second time ordering this for 2 trailers and no complaints. Thank you.



by:

Thanks!! What a great experience with etrailer.com. Trailer needed many parts, rusted, broken etc. Tried to contact maker of trailer for replacement parts, bad experience. Rude, unwilling to help, handling fees, VERY expensive shipping, and cash up front. I then turned to etrailer.com! Fantastic people on the line, sales personal were Kind, patient, and very knowledgeable about all my trailer needs. My parts arrived quickly, free shipping, and accurate. Not to mention I saved a bunch of money!!!! New Break System from front to back, new Trailer Winch. Thanks, Customer for life!



by:

Considering the era and the delivery was my fault, I have to say I had extraordinary help with the young lady. I forgot her name but she did a very good job assisting me and my package had finally arrived so thank you all very much.o


25
25

See what our Experts say about this Demco Brake Actuator

  • DA91 Demco Disc Brake Actuator for 2-5/16 Hitch Ball with Electric Lockout Needed
    The DA91 Demco surge brake actuator that you are looking for is part # DM8750311. This has a 2-5/16" coupler, comes with an electric lockout, is designed for disc brakes, and has a weight capacity of 8,000 lbs towing and 800 lbs tongue weight.
    view full answer...
    Image 1 for
  • Is There a Reverse Lockout For Demco Disc Brake Actuator DM8758811
    Hi Jason, We do have a reverse lockout (and cover!) you can use with the Demco Hydraulic Brake Actuator w/ Drop # DM8758811, which is the Reverse Lockout Solenoid # DM11993 and Cover # DM11674-95. Another option - if you don't have the actuator yet - is to just get the actuator with the solenoid and cover already on it so you don't have to do any installation. For that you'd need the Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout # DM8750311.
    view full answer...
  • Replacement Brake Actuator for Global Direct GDC-80 Brake Actuator
    We have the perfect replacement for your Global Direct GDC-80 brake actuator. Since you mentioned "down tongue" I believe you were referring to having an actuator with drop. If you have disc brakes, the best option is the Demco Hydraulic Brake Actuator w/ Drop - Disc # DM8758811 and if you have drum brakes the best option is the Demco Hydraulic Brake Actuator w/ Drop - Drum # DM8759411. Both of these actuators have a 4" drop, are compatible with a 2-5/16" hitch ball, have an 8,000 lb capacity...
    view full answer...
    Image 1 for
  • Recommended Hydraulic Brake Actuator for Drum Brakes
    Cal, no the Demco Hydraulic Brake Actuator # DM8758811 is only going to work with disc brakes. For drum brakes you're going to need the Demco Hydraulic Brake Actuator w/ Drop # DM8759411.
    view full answer...
  • Replacement For 6k - 8k Atwood Disc Brake Actuator
    Atwood is no longer in business, and the part number you asked about has unfortunately been discontinued, so it is no longer available. While I know it's not the answer you were looking for, the best option is a replacement for your Atwood actuator for disc brakes, and you can choose from the hitch ball size you need to couple to as well as the weight rating. Based on my research it looks like that master cylinder was for 6k to 8k rated actuators, so you can choose from any of the following...
    view full answer...
  • Is the Demco Hydraulic Brake Actuator DM8758811 Model DA91
    Yes you can; reason for that is the Demco Hydraulic Brake Actuator w/ Drop - Disc # DM8758811 is the Demco model DA91 so it is a direct replacement.
    view full answer...
    Image 1 for
  • Replacement for Titan Model 6 Trailer Brake Actuator
    That is a great photo, thank you; and while there are certain repair parts available for a Titan Model 6, I recommend replacing it altogether. The reason for this is the corrosion looks to have taken its toll on the actuator, and is at the point where a replacement makes the most sense in terms of safety and value. The Titan Model 60 is still a good option, and the right one will depend on if you have disc or drum brakes: - Disc Brakes: Titan Zinc-Plated Brake Actuator - Disc - 2-5/16"...
    view full answer...
    Image 1 for
  • What Actuator is Needed for Hydraulic Disc Brakes with 1,500 psi Rating Requirement
    Great question! You are correct that disc brakes, like part # K2HR526D, for your 5,200 - 6,000 lb trailer (or for any trailer for that matter) require a surge brake actuator with at least a 1,500 psi rating. The good news is that all of our hydraulic actuators that are designed for disc brakes, like the Demco # DM62VR, are rated for at least 1,500 psi so you're good to go on that end. Since you're only using the boat for fresh water you don't have to be as concerned about corrosion, but...
    view full answer...
  • Is There a Disc Brake Trailer Actuator with Manual Lockout
    The Demco Hydraulic Brake Actuator part # DM8669113 for 2" or part # DM8758811 for 2-5/16" are the only disc brake actuators we have that can be manually locked out using the Manual Reverse Lockout Kit for Demco Hydraulic Trailer Brake Actuators part # DM5939. They both have a 8,000 lb weight capacity and come with the eZ-Latch coupler mechanism so they should work well for you.
    view full answer...
  • Part for Bleeding Brakes with Demco Surge Brake Actuator DM8758811
    The easiest way to bleed the Demco surge actuator part # DM8758811 that you referenced will be with a speed bleeder like the Powerbuilt Brake Bleeder part # ALL648591. This allows you to bleed the brakes with a single person also.
    view full answer...
  • Does Demco Hydraulic Brake Actuator DM8758811 For Disc Brakes Work With Tandem Axle Trailer
    Yes, a tandem axle trailer with disc brakes is absolutely going to be compatible with the Demco actuator you mentioned: - Demco Hydraulic Brake Actuator # DM8758811 This actuator will bolt right onto a 3" wide trailer tongue for an easy install, has an 8,000 lb capacity, and will latch onto a 2-5/16" inch trailer hitch ball. I have added a link below to a video review for you to check out as well if you'd like to take a look.
    view full answer...
  • Can the Demco DM8758811 Replace Hydraulic Brake Actuator for 2 Inch Ball With 6,600 Pound GTW
    Yes, you can replace your current brake actuator with the Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2-5/16" Ball - 8,000 lbs # DM8758811. When selecting a brake actuator you must select one that meets or exceeds the GTWR of the trailer. Assuming you have a 3" wide trailer tongue and the 4" drop works for you, this will work well as a replacement. Keep in mind, this is designed for disc brakes. If you have hydraulic drum brakes you will want the # DM8759411 instead. I have...
    view full answer...

Do you have a question about this Brake Actuator?


Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Dustin K
Video Edited:
Dustin K

At etrailer 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.


Product Experts Available Now!
Call 1-800-940-8924