bing tracking image
  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2-5/16 Inch Ball Coupler
  6. 20000 lbs GTW
Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs
Demco

Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs

Part Number: DM8204011
In Stock
$579.64
Retail:$811.34
You Save: $231.70
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
Bolt it on your boat trailer and get it back into action! The plating on this actuator is 2 times stronger than standard zinc, and EZ-Latch is a step above the usual trigger latch, making hitching up practically automatic. Proudly made in the USA. 1-800-940-8924 to order Demco brake actuator part number DM8204011 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 - Drum - Zinc - 2-5/16" Ball - 20,000 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (54)
  • Q & A (0)
  • Photos

Demco Brake Actuator - DM8204011

Highlights

  • Hitch Up Fast and Confident: EZ-Latch drops on and snaps tight without extra steps.
  • Ready for Harsh Marine Use: Zinc plating lasts 2× longer with 200-hour salt-spray protection.
  • Smooth, Reliable Braking: Surge design activates drum brakes automatically as you slow.
  • Built for Heavy Loads: Rated for 20,000 lbs GTW and mounts to a 3" wide trailer tongue.
  • Handles Height Differences: Built-in 4" drop helps align trailer and tow vehicle levels.
  • Long-Lasting Design: Heavy-duty steel body with self-lubricating liner for years of smooth travel.
Made in USA

Features to know about

Built to Last: Heavy-Duty Zinc-Plated Steel with 200-Hour Salt Spray Rating

This actuator is made from heavy-duty steel and treated with zinc plating that holds up against corrosion 2 times longer than a standard coating. The 200-hour salt spray rating makes it a solid choice for trailers that see wet, salty, or rough conditions. The built-in drop helps line up your trailer height, and the 20,000-lb gross towing weight rating gives you plenty of strength for serious hauling.

Quick, Confident Hookups: EZ-Latch 2-5/16" Ball Coupler

The EZ-Latch system makes hitching fast and foolproof. You don’t have to hold back a trigger or guess if the latch is seated; just lower the coupler onto the hitch ball and listen for the metallic clink that tells you it’s locked. Once it’s on, you can add a locking pin through the side hole if you want extra theft protection. The secure connection means you spend less time checking your latch and more time getting on the road.

Demco EZ-Latch coupler connected to a hitch ball, showing how the automatic latch secures the trailer to the tow vehicle.

Cutaway view of Demco coupler showing internal locking mechanism and how the hitch ball seats inside the coupler body.

Smooth Braking Every Time: Composite Master Cylinder with Large Reservoir

Inside, the glass-reinforced nylon master cylinder keeps things running clean and consistent. It won’t rust or pit, and the large reservoir helps prevent low fluid levels during long trips. The automotive-style diaphragm cap seals out contamination so your brake fluid stays fresh longer. Together, these features make braking smooth and reliable without needing a separate brake controller.

Low Friction Movement: Self-Lubricating Plastic Liner

The inner slide moves on a heavy-duty, self-lubricating acetal copolymer liner that keeps everything gliding easily under load. It’s tough, quiet, and durable, so the actuator telescopes smoothly when slowing or stopping and returns to position when you pull away again. That smooth operation translates to steadier braking and less wear over time.

Close-up view of hard plastic acetal copolymer liner inside the Demco DA10 surge brake actuator showing smooth internal surface.

Simple Install: Bolt-On Mount for 3" Channel Tongues

Designed to bolt right on top of a 3" wide trailer tongue using 1/2" x 4-1/2" Grade-5 bolts (not included), this surge actuator is straightforward to mount. The built-in breakaway cable with snap hook adds safety by stopping your trailer if it ever disconnects. Once bolted in place, it’s ready to deliver years of strong, dependable performance with hydraulic drum brakes.

Specs

Application

  • Application: trailers with hydraulic drum brakes

Mounting

  • Mounting: straight, 3" wide trailer tongue
  • Designed to bolt on top of a: 3" wide trailer tongue
  • Required hardware: 1/2" x 4-1/2" Grade-5 bolts (not included)
  • See below for: bolt pattern dimensions

5-hole standard bolt pattern diagram for Demco surge brake actuator showing mounting hole layout and spacing dimensions.

Capacity

  • Gross towing weight: 20,000 lbs
  • Maximum tongue weight: 2,000 lbs

Coupler Specifications

  • Ball size: 2-5/16"
  • Drop: 4"
  • Model number: DA20

Warranty

  • Warranty: 1-Year

8204011 Demco DA20 Hydraulic Trailer Brake Actuator for Drum Brakes - 2-5/16" Ball Easy-Latch Drop Coupler - 20,000 lbs





Customer Satisfaction Score:

Ratings & Reviews

4.9

54 reviews
Review sort icon
Bolt it on your boat trailer and get it back into action! The plating on this actuator is 2 times stronger than standard zinc, and EZ-Latch is a step above the usual trigger latch, making hitching up practically automatic. Proudly made in the USA.

by:

Product as describe, customer service went above and beyond. They definitely provided beyond 5 star rating. I appreciate everyone’s help at etrailer to make this shipment possible!!!



by:

I live on a farm where it seems we're always fixing trailers or building trailers for use. I have bought several hitches from etrailer and they have ALWAYS been helpful. Great selection to choose from also. Recommend them highly.



by:

Hitch arrived early and looks just like the picture and description. It is an exact replacement for the original. All the parts are available to rebuild the unit as well but mine was rusted pretty badly so I would have had a lot of time refinishing everything I didn't replace. In my situation there was about a $50 difference between rebuilding old or complete new unit. If your hitch is in better shape than mine, they have an excellent selection of repair parts. I would suggest taking yours apart and as long as it's not rusted solid, they can probably supply you with parts for less than $70.



by:

Had a hard time trying to find this product, but E trailer was able to provide me with great service and found the trailer hitch I needed for my trailer.



by:

This was an exact replacement for my 25 year old hitch! So glad they have so many choices, very helpful and a perfect fit



by:

great customer service and quality prod uct.



by:

Used this for a homemade dump trailer.

Found
it was best to use a skid steer to bleed the system, move the tongue in. Then have a chain to back out. 2 person job.

Overall good product. Brakes work great! Plan on making a cover for the reservoir tank.



by:

Excellent quality, very sturdy construction and excellent service.



by:

Easy install excellent product



by:

Quality of the parts is good. Fit was good. Assembly quality was poor. Missing the cotter pin for the damper end pin . Brake fluid outlet fitting was loose.



by:

Nice hardware and fantastic customer service Nicole was very knowledgeable and helpful!



by:



by:



by:



by:



by:



by:



by:



by:

Excellent service as always Thanks Steve



by:

Quality as always



by:

Friendly on the phone. Shipped when said they would. Was delivered as promised.



by:

Bolt on replacement for the old hitch. Fit and works perfectly



by:

Thank you for the timely shipping. Part was just as described. Very pleasant doing business with your company.



by:

hello it's not to my address yet but i will call when i get it also do you have pindel surge hitch if so show me thanks

Jenny N. profile picture

Jenny N.

2/1/2023

We do have pintle actuators available. For example part # DM8202022 or part # DM8202152.



by:

Fast and exact replacement part, 300 bucks less that the local trailer parts store, A1 ++++


25
25

See what our Experts say about this Demco Brake Actuator

  • Replacement for Model 20 Surge O Matic Brake Actuator
    Hey Chris! Do you need that full 20k capacity? Do you have disc or drum brakes? I recommend the following based on brake type: -Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs # DM8204011 -Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 20K # DM8204311 Both are designed to fit a 3" wide tongue and use a 2-5/16" ball with the same capacity you have now. If a lower capacity will work let me know in the comments...
    view full answer...
  • Will the Demco Actuator DM8204311 Work on a Trailer With 3 Axles?
    The Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs # DM8204011 is rated to be used with brakes on 2 axles, or 4 brakes total. If all 3 of your axles have brakes, you will need to add the Demco Replacement Large Bore Aluminum Master Cylinder w/ Bypass Solenoid - Disc Brakes # DM6113 and Push Rod Assembly for Demco Brake Actuators with 1-1/4" Bore # DM74ZR. These additions will get the needed pressure to actuate all 3 axles.
    view full answer...
  • Can Demco Disc Brake Actuator w/ Lockout & 20,000 lb Capacity Work w/ Drum Brakes
    Disc brake actuators like the Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout - Disc - Zinc - 2-5/16" Ball - 20K # DM8204311 cannot be used with drum brakes because disc brake actuators use much higher pressure, so they could blow out the wheel cylinders, among other issues. That said, you can add a lockout to the drum brake version of this actuator: - Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2-5/16" Ball - 20,000 lbs # DM8204011 - Reverse Lockout Solenoid for...
    view full answer...
  • Recommendation on a Surge Coupler that is Rated to Work on a Trailer w/ Disc Brakes
    I found a surge coupler that will work well on your trailer. However, the part that you referenced, # DM8204011, is designed only to work with drum brake systems. Disc brake systems need higher psi for the calipers to activate the brakes and drum surge coupler cannot supply the correct pressure. I recommend the Demco Hydraulic Brake Actuator w/ Drop for Disc Brakes, # DM8204311. This surge coupler is almost identical to the one you referenced, except it is rated to be used with disc brakes.
    view full answer...
  • Drum Brake Surge Brake Actuator Comparable to Demco DM8104311
    Hi William! If you're looking for a drum brake version that's similar to the Demco part # DM8104311, the closest Demco option is the Demco Hydraulic Brake Actuator with Drop, Part # DM8204011. It has the same basic design and is built for drum brakes, but it does not include an electric reverse lockout. If you do need an electric lockout, the closest option we offer is the Dexter Hydraulic Brake Actuator with Drop and Electric Lockout for drum brakes part # T4854020, as Demco does not...
    view full answer...
  • Does Demco Hydraulic Brake Actuator Have EZ-Latch
    Hey Benjamin! The Demco Hydraulic Brake Actuator # DM8204011 does come with the Demco EZ-Latch system. Typically it looks like the black plastic latch you see on most of their couplers. This has a metal latch, but it is still an EZ-Latch. If you watch the video further down on this page you can hear it called out starting at the 45 second mark. What kind of trailer are you working on?
    view full answer...

Do you have a question about this Brake Actuator?


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Steven C
Installed by:
Steven 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