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

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

Part Number: DM8669113
In Stock
$316.78
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 DM8669113 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" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (23)
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  • Used (1)

Demco Brake Actuator - DM8669113

  • Surge Brake Actuator
  • Disc Brakes
  • 2 Inch Ball Coupler
  • 8000 lbs GTW
  • Bolt-On
  • Farm Trailer
  • Boat Trailer
  • Construction Trailer
  • Travel Trailer
  • Utility Trailer
  • No Lockout
  • Demco
  • 3 Inch Channel Tongue

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.


Features:

  • Activates your trailer's drum brakes when tow vehicle slows or stops - no brake controller needed
  • Makes hitching up fast, safe, and super-easy
    • EZ-Latch coupler lets you hook up when latch is in closed position
    • Latch will snap into place when you lower the coupler onto your hitch ball
    • Built-in drop helps you match tow vehicle height
  • Provides you with years of smooth, durable, and efficient operation
    • Automotive-style diaphragm cap prevents fluid contamination
    • Large reservoir allows for increased brake fluid capacity
    • Glass-reinforced, nylon, composite master cylinder
    • Inner member glides on a heavy-duty, self-lubricating plastic liner
  • Constructed of heavy-duty steel
  • Includes breakaway cable with snap hook
  • Holds up against corrosion 2 times longer than a standard zinc plating - 200-hour salt spray rating
  • Bolts onto your trailer tongue
    • Hardware not included
  • Made in the USA


Specs:

  • Application: trailers with hydraulic disc brakes
  • Designed to bolt on top of a 3" wide trailer tongue
    • 1/2" x 4-1/2" Grade-5 bolts (not included)
    • See below for bolt pattern dimensions
  • Ball size: 2"
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Drop: 4"
  • Model number: DA91
  • 1-Year warranty


3 hole standard bolt pattern for Demco surge brake actuator

If your trailer isn't married to just one tow vehicle, this Demco actuator will be a great option for you. Just keep in mind that because it doesn't have a reverse lockout on it to keep your brakes from locking up, either you will need to add a manual one (DM5939 - sold separately) or have free-backing brakes instead.


Never Second Guess Your Connection Again with the Demco EZ-Latch

Few things matter in towing as much as a secure connection to your hitch ball. The thing of it is, some coupler latches don't really have a way to show you that they have a firm grasp on the hitch ball. You either just have to eyeball it or try to wiggle the coupler latch until it closes. And if you opt for just trusting your coupler and assuming it's on there, you might not notice the gap between the ball and your coupler's ball socket, an issue known as highballing, until it's too late and you lose your trailer on the highway.


The underside of the Demco eZ-Latch shows the inside of the coupler with the latch disengaged The underside of the Demco eZ-Latch shows the inside of the coupler with the latch engaged

That won't be an issue with the EZ-Latch on this Demco actuator. Just center your coupler over the hitch ball, and lower your trailer tongue as you normally would.


Demco Coupler Cutaway

As the coupler's socket slowly accepts the hitch ball, you'll see the latch rise. Keep lowering your trailer tongue until you hear the metalic clink . When you do, you'll know for certain that you've got a good, strong connection, without the need to tug or wiggle the latch into place. This gets you on the road a little bit quicker and with a lot more confidence.


The other neat thing about the EZ-Latch is the low-profile design of the handle itself. It waterfalls onto the coupler's socket. This contour does 2 things: it deflects anything that might accidentally get under the latch handle to release the ball, and it limits any damage to the coupler should anything hit it. Because it's not sticking up like a sore thumb, it's much less likely to get bent or broken by flying road debris or your tailgate.


When we first saw the latch, we, like most people, wrote it off as it being "just plastic." Turns out it's actually a nylon composite, which Demco said was pretty durable. So we tested it in the same way that any sensible (albeit skeptical) person would - we beat it with a hammer. When we couldn't get the latch to break, we were sold. (Someone probably did lose a bet, though. It was a while ago, so who can really say?)


A Demco coupler installed on a straight-pole trailer tongue

The EZ-latch is so easy to use that you don't even need a safety pin to keep the ball secured inside the socket. But you can, as a theft deterrent, put a locking pin through the dedicated hole on the side of the coupler.


Hard Plastic Lining for a Smooth Towing Experience

You might see the phrase "hard plastic" and think, how durable could that really be? But the truth is, it's tougher than it looks and you'll probably never break it.


Hard plastic lining of the Demco DA10 surge brake actuator

Its real name is acetal copolymer. It has a self-lubricating surface. It's extremely resilient, durable, and smooth. And it wears well over time. In fact, this same can even be found in some automotive applications, making it perfectly suited for a telescoping brake actuator on a boat trailer.


How Does a Surge Brake Actuator Work?

When you slow to a stop as you're towing, momentum pushes your trailer toward the rear of your vehicle. When this happens, the surge brake actuator compresses the master cylinder inside, which forces it to push hydraulic fluid out to your brake lines, ultimately engaging your trailer brakes. When you start moving again, the actuator will telescope back out, stopping the flow of fluid back to the brakes and allowing your trailer's wheels to start rolling again.



8669113 Demco DA91 Hydraulic Trailer Brake Actuator for Disc Brakes - 2" Ball Easy-Latch Drop Coupler - 8,000 lbs




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Customer Satisfaction Score:

Ratings & Reviews

4.9

23 reviews
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.

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good



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Grteat Service and fast shipping



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Good Item



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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!



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



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



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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!



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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.



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Very helpful and got the right answers and part



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

Joe S. profile picture

Joe S.

7/6/2020

The brake actuator is still working properly



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



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

Ken B. profile picture

Ken B.

6/25/2020

Working perfectly.



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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!



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See what our Experts say about this Demco Brake Actuator

  • Recommended Replacement for Tie Down Engineering (TDE) Brake Actuator 48980
    The Tie Down Engineering (TDE) Brake Actuator 48980 also known as the 80LP/85LP is a 8,000 lb or 8,500 lb disc brake actuator with 2" coupler. In order to replace this, the best option we have is the Demco Hydraulic Brake Actuator part # DM8669113 which is rated for use with disc brakes, has an 8,000 lb weight capacity, and uses a 2" hitch ball. It also has a built-in drop which helps you match the tow vehicle height better.
    view full answer...
  • Replacement Brake Actuator With 2" Coupler For Demco Kar Kaddy
    Hey Aaron, I confirmed with Kar Kaddy that Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2" Ball - 8,000 lbs # DM8669113 is the correct replacement actuator with 2" coupler for the Demco Kar Kaddy SS Tow Dolly with Disc Brakes - Foldable - 4,800 lbs # DM9713045 and Demco Kar Kaddy X Tow Dolly w/ Disc Brakes - Tilt Bed Frame - 4,800 lbs - Wide Tread # DM9713093. If you happen to have an older model then let me know, but this should be what you are needing.
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  • How to Fix Swaying Demco DM8669113 Kar Kaddy SS Tow Dolly
    Demco doesn't sell the Acetyl copolymer lining used in their # DM8669113 brake actuator as a separate item. I spoke with my Demco representative who said that the lining wouldn't have any influence on a swaying # DM9713045 Kar Kaddy SS car dolly. The lining's purpose is to allow the brake actuator to move smoothly back and forth so it wouldn't have any affect on the tow dolly swaying. Is this occurring with the tow dolly empty? Demco tells me that when towing empty, you'll need to insert...
    view full answer...
  • 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.
    view full answer...
  • Dimensions of Demco Hydraulic Brake Acutator with Drop
    The Demco Hydraulic Brake Actuator # DM8669113 will hang over the sides of the tube with the mounting plates 2-1/8" on each side and the channel of the actuator is 15-1/4" long. The overall dimensions on the coupler are 7-3/4" tall x 29" long x 4-1/2" wide. I've attached a photo with the dimensions to this answer.
    view full answer...
    Image 1 for
  • Troubleshooting Disc Brakes with Aero-6000 on Four Winns Boat Trailer Dragging/Overheating
    The #17 nut that you are referring to for your Aero-6000 actuator (similar to part # T63FR) looks like it simply helps to keep the latch in place. If you are having problems with your brakes dragging and overheating then either your disc brakes/caliper need to be cleaned, your breakaway cable has been activated, or the internal components of your actuator are needing replacement. If you check your brakes/calipers and breakaway cable isn't activated then the only internal components that...
    view full answer...
    Image 1 for
  • Manual Lock Out Disc Brake Actuator Rated for 7k and for 2 inch Ball
    We have the Demco Disc Brake Actuator part # DM8669113 which fits a 2 inch ball and can be manually locked out with the part # DM5939. This has an 8k capacity and is only option that covers everything you are looking for.
    view full answer...
  • 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...
  • Trailer Hub for 3,500 lb Axle That Has 5 on 5 Bolt Pattern
    There are idler hubs as well as hub and drums with a 5 on 5" bolt pattern for a 3,500 lb axle: - Trailer Hub and Drum Assembly # AKHD-550-35-K (Standard Spindle) or # AKHD-550-35-EZ-K (E-Z Lube Spindle) - Trailer Idler Hub Assembly # 84550BX (Standard Spindle) or # 84550UC1-EZ (E-Z Lube Spindle) These will work so long as you have inner bearing L68149, outer bearing L44649 and grease seal 58846. They all have a 5 on 5" bolt pattern and are pre-greased for your convenience. I have added...
    view full answer...
  • What Would Cause Demco Tow Dolly to Sway When Unloaded
    What dolly do you have that sways when unloaded? If it's a Demco you'll need to insert the pin that defeats the auto steer feature that allows the dolly to track behind the tow vehicle better.
    view full answer...
  • Trailer Tongue Length Required to Install Demco Hydraulic Brake Actuator
    I reached out to a representative of Demco who told me that the outer case of the Demco Hydraulic Brake Actuator # DM8669113 needs 18" of space on the trailer tongue to bolt on. Additionally, you will need between 2" and 4" of clearance behind the actuator to get the brake line attached to the master cylinder. You will need only 2" if you have a pre-bent brake line/hose with a 90 degree fitting or 4" if you have a straight hose or hard line that needs to make the 90 degree bend.
    view full answer...
  • Using an Electric Trailer Brake Controller With Boat Trailer Hydraulic Brakes
    The 2012 BMW X5 has a rated towing capacity of 6000-lbs according to my research and for this vehicle we offer several Class III hitches (viewable on the link provided) that share this same maximum towing capacity, along with a tongue weight limit of 600-lbs. Note that these hitches do not fit the M model. You'll want to be sure that your fully-loaded boat/trailer does not exceed the towing or tongue weight capacities of either the vehicle or the hitch (your hitch should have a sticker...
    view full answer...
  • Electric Reverse Lock Out Solenoid Recommendation for DA91 Demco Actuator
    Yes, all you need to add an electric lockout to your Demco DA91 Actuator part # DM8669113 is the solenoid part # DM5404.
    view full answer...

Do you have a question about this Brake Actuator?


Used Items Available
Used Picture for Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2" Ball - 8,000 lbs
Used Picture for Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2" Ball - 8,000 lbs
Used Picture for Demco Hydraulic Brake Actuator w/ Drop - Disc - Zinc - 2" Ball - 8,000 lbs

Condition: Surface Scratches

Notes: Item has minor cosmetic sticker residue. Otherwise unused.

$266.47
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Written by:
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Employee Jeff D
Installed by:
Jeff D
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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