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

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

Part Number: DM8669112
In Stock
$315.39
Retail:$426.12
You Save: $110.73
Brake Actuator
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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 DM8669112 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" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (54)
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Demco Brake Actuator - DM8669112

Highlights

  • No Brake Controller Needed: Drum brakes engage automatically as your vehicle slows.
  • Quick, Confident Hookup: EZ-Latch snaps onto the 2" ball without extra steps or pins.
  • Ideal for Level Towing: Built-in 4" drop helps match your trailer height to your tow vehicle.
  • Perfect for Use Around Water: Zinc plating lasts 2× longer with a 200-hour salt-spray rating.
  • Smooth, Durable Operation: Self-lubricating liner and composite master cylinder reduce wear.
  • Strong and Ready to Tow: Rated for 8,000 lbs GTW and 800 lbs tongue weight on 3" tongues.
Made in USA

Features to know about

Confident Hookups Every Time: EZ-Latch Coupler for 2" Ball

The EZ-Latch coupler makes hitching simple and secure. You don’t have to fight with a trigger latch or guess whether it’s locked on. Just lower the trailer onto your 2" hitch ball—the latch snaps into place automatically with a solid click. There’s no need to hold the latch open, and you can drop in a locking pin through the side hole if you want extra theft protection. This setup gives you quick, repeatable hookups and a lot more confidence before you hit the road.

Demco EZ-Latch coupler engaged onto a hitch ball showing automatic locking mechanism in use

Better Trailer Leveling: Built-In 4" Drop

If your setup needs a little help lining up, the built-in 4" drop takes care of mismatched heights between trailer and tow vehicle. It keeps the trailer level for smoother towing and steadier braking. The actuator bolts right onto a 3" wide tongue using 1/2" x 4-1/2" Grade-5 bolts (not included) and follows a standard three-hole pattern with centers at 3" and 12-1/2". That means easier alignment and no custom drilling when you’re replacing an old unit.

Smooth Braking You Can Rely On: Composite Master Cylinder with Large Reservoir

When you ease on the brakes, the Demco DA91 actuator pushes fluid from its glass-reinforced nylon master cylinder straight to your drum brakes. The automotive-style diaphragm cap keeps contaminants out, while the large reservoir holds more brake fluid to help prevent running low during long hauls. The inner member glides on a heavy-duty, self-lubricating plastic liner for consistent movement every time you stop.

Close-up of hard plastic acetal copolymer lining inside Demco DA10 surge brake actuator

Built for Longevity: Heavy-Duty Steel and Double-Strength Zinc Plating

This actuator is made from heavy-duty steel and coated with zinc that lasts twice as long as standard plating, proven by its 200-hour salt spray rating. That’s real peace of mind for trailers that see water, mud, or road salt. The included breakaway cable with snap hook adds another layer of safety—if the trailer ever separates, it pulls tight to activate the brakes automatically.

Cutaway view of Demco coupler showing internal latch and ball socket mechanism

No Brake Controller Needed: Simple Surge Operation Rated at 8,000 lbs GTW

With an 8,000 lb gross towing weight and 800 lb maximum tongue weight rating, this surge actuator is ready for serious work. It doesn’t need an electric brake controller to function—just hitch up, fill the reservoir, and go. As you slow down, momentum compresses the actuator and applies hydraulic pressure to your drum brakes for smooth, proportional stopping every time.

Specs

Application

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

Dimensional diagram showing three-hole standard bolt pattern measurements for Demco hydraulic brake actuator model DM8669112

Weight and Capacity

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

Coupler and Drop

  • Ball size: 2"
  • Drop: 4"

Model and Warranty

  • Model number: DA91
  • Warranty: 1-Year

8669112 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - 2" Ball Easy-Latch Drop Coupler - 8,000 lbs





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:

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



by:

very good product



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:

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



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.



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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:

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



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



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Easy install, no issues



by:

Great. Item came early notices were very fast. Everyone was very friendly and helpful. Thank you very much.



by:

The actuator works great and I have now sold the trailer and the new owner is very happy with the unt



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.


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See what our Experts say about this Demco Brake Actuator

  • Adding Manual Lockout to Surge Brake Actuator
    The reason there are different actuators for disc brakes and drum brakes is the psi the brakes operate at. Disc brakes operate at a higher psi than drum brakes and either too much or too little pressure can cause damage to the brakes. There are units that can have manual reverse lockouts installed but not all.
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  • Can Electric Lockout be Added to Demco Hydraulic Brake Actuator w/ Drop For Drum Brakes
    Hi there Rich; while it doesn't come with one, there is a way to add an electric lockout to the Demco Hydraulic Brake Actuator w/ Drop - Drum # DM8669112. All you need to do is add the Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators - Non-Bypass # DM11993.
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  • Replacement for a TDE LP8500 Boat Trailer Acuator
    We don't offer an 8500 lb rated surge coupler, but we might have options that would work for you. If the GVWR (weight of trailer plug boat) is 8000 lbs or less, I'd recommend the Demco item # DM8669113 if your trailer has disc brakes or item # DM8669112 for a drum brake aactuator.
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  • How to Bleed Brakes with Demco Hydraulic Brake Actuator
    I have attached an image from the operation manual for the Demco Hydraulic Brake Actuator # DM8669112 that details how to bleed the brakes. The process consists of first elevating the trailer tongue about 4 to 6 inches and then loosening or removing the two 5/16" bolts that hold the lever guide and emergency lever spring and removing the master cylinder fill cap. You will want to use short strokes to pull the emergency lever forward, pumping the master cylinder until the brake fluid in...
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    Image 1 for
  • Recommendation to Replace Atwood 83010 Brake Actuator
    Your existing Atwood model 83010 Brake Actuator (which as you mentioned is no longer available) is an 8,000 pound rated assembly for hydraulic drum brakes that's compatible with a 2" ball. It's designed to fit 3" wide straight trailer tongues. In terms of specs the closest option we have available for replacement is the Demco Hydraulic Brake Actuator # DM8669112. This actuator features an 8,000 pound towing capacity, works with 2 inch hitch balls, fits 3" wide trailer tongues, and is...
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  • Recommended Replacement Coupler for Atwood 83000 Surge Brake Actuator Coupler
    The Atwood 83000 was a 8,000 lb drum brake actuator for a 2 inch hitch ball that has been discontinued. For a replacement I recommend the Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2" Ball - 8,000 lbs # DM8669112. The only other option for that 8,000 lb capacity is a channel mount like the Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 8,000 lbs # DM8759131 which will allow you to use a coupler like the Demco Trailer Coupler - Adjustable Channel...
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  • Replacement Brake Actuating Coupler for Upgrade to Disc Brakes
    The bolt hole dimensions of the Demco Brake Actuator # DM8669112 are 12-1/2 inches on center and 3 inches on center. I've attached a photo to assist. The Titan # T4747220 has mounting holes that are 3 inch on center so 2 of the 3 holes will align with your current coupler. Instead of changing out your entire coupler, you may want to simply change out your master cylinder on your Demco Actuator using the Replacement Master Cylinder for Demco Actuators - Disc Brakes # 5672. This will...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Surge Brake Actuator Assembly for Boat Trailer 3" Straight Bolt Pattern
    The Demco Hydraulic Brake Actuator # DM8669112 will fit the 3" frame on your boat trailer. I have attached a picture that will show the different bolt patterns as this on will sit above the frame and not quite on the frame. The 3 hole straight that you have will have bolt holes that are 0.85" below the top of the frame while the 3 hole standard holes on the # DM8669112 are 1.5" below the top of the frame rail. I recommend the Demco Hydraulic Brake Actuator w/ Manual Lockout # DM8760011....
    view full answer...
    Image 1 for
  • Bolt Hole Dimensions Of Demco Brake Actuator # DM8669112
    The mounting holes of the Demco Hydraulic Brake Actuator w/ Drop - Drum - Zinc - 2" Ball - 8,000 lbs # DM8669112 are in the same exact locations as you mentioned. From front bolt to second bolt center to center is 3 inches. From the front bolt to the rear bolt center on center is 12-1/2 inches. This bolt-on installation requires 1/2 inch by 4-1/2 inch Grade 5 bolts that are not included. I've attached a photo to help.
    view full answer...
    Image 1 for
  • Replacement Demco DA91 Surge Brake Actuator For a Atwood 83000 Drum Brake Actuator
    The drop on the Demco Hydraulic Brake Actuator # DM8669112 is only moving he coupler lower so you will not need as large of a rise on the tow vehicle. We do have the Demco Hydraulic Brake Actuator # DM8609101 without a drop that has all the same features. They both are rated for a tongue weight up to 800lbs, trailer weight up to 8,000lbs, have a 2" coupler, zinc coated, rated for drum brakes and have the same bolt pattern.
    view full answer...
  • Replacement for Atwood 83000 Surge Brake Actuator
    The Atwood 83000 is a weld-on coupler that fits a 3" straight trailer tongue and is rated for 8,000 lbs. If you truly need the 8,000 lb capacity then I recommend the Demco Hydraulic Brake Actuator w/ Drop # DM8669112. However, this does have a 4" drop. If a 7,000 lb gross towing weight works for your application then the Demco Hydraulic Brake Actuator # DM72VR would be a better choice. Both of these feature a bolt-on installation so you don't have to worry about welding and a zinc plating...
    view full answer...
  • Replacement Surge Brake Coupler for Boat Trailer
    The coupler you are seeking is a surge brake coupler. You may not have the same look as your previous coupler as styles can change, but you need to make sure you have the correct capacity rating for your trailer and the correct coupler as drum brakes and disc brakes have different psi ratings. You will also need to determine if you need a manual lockout, electric (reverse light circuit) lockout, or no lockout. Because you already have stated it is a 2 inch ball, I've linked the pages...
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  • Is There a Manual Lockout for Demco DA91 Actuator part # DM8669112
    The Demco Actuator part # DM8669112 that you referenced is compatible with the manual lock out part # DM5939 that you referenced so that would be exactly what you'd need.
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  • Recommended Drop Coupler Replacement for UFP A-75 Surge Brake Actuator
    It sounds like you need a drop coupler on the trailer like the Demco Hydraulic Brake Actuator part # DM8669112. The built-in drop will help with coupling on smaller vehicles. It is designed for drum brakes, has a 2" coupler, and 8,000 lb weight capacity.
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  • How to Determine the Correct Replacement Brake Assembly Size for a 6,000-lb Axle
    You can determine what the correct replacement brake assembly is by measuring the diameter of the brake assembly. This is measured from one brake pad directly across to the other brake pad. This is demonstrated at the 2:05 mark of the attached review video for our Electric Trailer Brake Kit # AKEBRK-7-SA that should be what you are needing for your application. This kit measures 12" x 2" and is compatible with 5.2K to 7K axles. This kit also comes with both the right and left hand assemblies. If...
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  • Solution for lowering a pontoon trailer's coupler that sits too high for Jeep Grand Cherokee
    The only replacement for your Dexter DX7.5L A-60 Brake Actuator # DX33FR that has drop would be the Demco Hydraulic Brake Actuator w/ Drop 2" Ball - 8,000 lbs # DM8669112. This offers 4" of drop and is still compatible with a 2" ball and drum brakes, just as your current Dexter actuator is. It looks like your 2019 Jeep Grand Cherokee receiver should sit about 19" from the ground, so 4" of drop may allow the trailer to sit level (measure to verify). If 4" is not enough drop or if you plan...
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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

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