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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 - Drum - Primed - A-Frame - 2" Ball - 8,000 lbs
Demco

Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2" Ball - 8,000 lbs

Part Number: DM8609502
In Stock
$295.92
Retail:$348.64
You Save: $52.72
Brake Actuator
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Made in the USA with a wear-resistant, self-lubricating lining, this surge actuator will work smoothly for years to come, and the EZ-Latch is a step up from finnicky trigger latches. Primed for welding on a 50-degree A-frame trailer. 1-800-940-8924 to order Demco brake actuator part number DM8609502 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" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (39)
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Demco Brake Actuator - DM8609502

  • Surge Brake Actuator
  • Drum Brakes
  • 2 Inch Ball Coupler
  • 8000 lbs GTW
  • Weld-On
  • Farm Trailer
  • Boat Trailer
  • Construction Trailer
  • Travel Trailer
  • Utility Trailer
  • No Lockout
  • Demco
  • A-Frame Tongue

Made in the USA with a wear-resistant, self-lubricating lining, this surge actuator will work smoothly for years to come, and the EZ-Latch is a step up from finnicky trigger latches. Primed for welding on a 50-degree A-frame trailer.


Features:

  • Activates your trailer's drum brakes when your tow vehicle slows or stops - no brake controller needed
  • Fits tightly around hitch ball for secure connection
    • Bulldog-style coupler is great for utility, livestock, cargo, and construction trailers
    • Sliding collar keeps the jaws of the hinged socket clamped around the ball
    • Safety pin holds the collar - and jaws - in place
  • Provides 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
  • Welds onto your trailer tongue
    • Primed finish for easy welding and painting
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Designed to weld onto a 50-degree A-frame trailer
  • Ball size: 2"
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Model number: DA91
  • 1-Year warranty


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 activating when you drive in reverse, you will need to have free-backing brakes on your trailer.


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.


Demco eZ-Latch in Use

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 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 material can even be found in some automotive applications, making it perfectly suited for a telescoping trailer brake actuator on a utility, livestock, cargo, or construction 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.



8609502 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - 2" Ball - 8,000 lbs




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Customer Satisfaction Score:

Ratings & Reviews

4.9

39 reviews
Made in the USA with a wear-resistant, self-lubricating lining, this surge actuator will work smoothly for years to come, and the EZ-Latch is a step up from finnicky trigger latches. Primed for welding on a 50-degree A-frame trailer.

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



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Extremely happy with service and product. Thank You!



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The people at E-trailer were very helpful and the product that came was exactly what i needed.



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Needed this for a water trailer. Couldn’t find one locally. Ordered and received very quickly. Item was as pictured and looks like it should work great!



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



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



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perfect! its exactly what i needed.



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Good product for a reasonable price. Product availability and service was excellent.



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Very impressed! This will be perfect for my trailer rebuild.



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



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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...!!!



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Thanks for your help in these trying times. I am restoring the surge brake operations to a 1985 Wells cargo enclosed trailer and performing all of the work myself. Not an easy task on a 36 year old trailer purchased new. I received this part and it is fantastic and arrived many days ahead of the projected delivery date. My prior orders also arrived early and the trailer brake parts and lines fit perfectly. Thank you for providing the service and knowledge to get me what I needed to restore an obsolete trailer. I can provide photos on completion. I may need to order new parts again in 36 years, I will be 94.



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Yes i recieved the device , I'ts better than i expexted , very well built , Can definetely handle more weight than designed for, P/S I invented the device about 45 years ago. The device takes the shifting weight away from the hitch and tong of the trailer. The first device used a coil spring, The device i recieved uses a shock works the same as a coil spring.



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Really pleased on the outcome. I did have to paint where I had to weld. Would be nice to have the color to match the metal.



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excellent!. I painted with the trailer color



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The weld on installation matched the trailer tongue angle perfectly and is a very rugged build. I connected the hydraulic line to the original brake tubing, bled the brake fluid through the system using pressure with the break away lever and put the trailer back to work. The braking power is smooth and consistent. The only trouble is when I back the trailer up an incline. I would purchase the backing option lever so you don’t have the trouble backing the trailer putting on the brakes.



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Awesome unit, but did not come with installation or system bleed instructions.



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Amazing upgrade from magnetic brakes! Brittany was friendly, prompt, knowledgeable.



by:

Very good product. I have been a fabricator for 42 years, and I will say this is very well made. etrailer.com is a great place!


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See what our Experts say about this Demco Brake Actuator

  • Looking For A-Frame Surge Brake Coupler For Disc Brakes
    Hello Thor, cool name. Our only option for that is the Demco Hydraulic Brake Actuator w/ Lockout # DM8105422. This will work with disc brakes and will fit your A-frame. You just need to get the ball coupler piece separately, such as the Demco Slide-Lok Trailer Coupler # DM05557-97 which is for a 2-5/16" trailer ball. This coupler is also available in a 20K capacity as part # DM8205222. Feel free to reach out with any other questions or if there is anything else you need.
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  • Replacing A-Frame Surge Brake Actuator On 1966 Scotchman Camper
    Hello Randy, thanks for reaching out. The Demco Hydraulic Brake Actuator # DM8509602 can work for that as long as your Scotchman camper uses drum brakes. As far as better options the only thing I see would be the Demco # DM8609502 just because it uses their ez-latch coupler which is durable and easy to deal with. The one you mentioned has a collar lock coupler which is fine, I just like the ez-latch better. Both are about the same dimensionally. I went to our warehouse and measured the...
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  • Are Replacement Parts Available for an Atwood Surge Brake Coupler?
    The Surge actuator you currently have installed is an older Atwood model. The cap for the brake fluid confirmed that for me once I saw it. Problem there is that Atwood is no longer in business and no replacements are available, unfortunately. We do have a potential replacement available, but it is quite a bit different. The Demco Hydraulic Brake Actuator # DM8609502 is a weld on actuator with a 2 inch coupler, and is rated up to 8,000 pounds. The only problem is how it attaches. I will...
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  • Solution for Older Atwood Surge Actuator with Bad Shock
    Atwood is no longer making actuators at this time so there are no replacement shocks for their actuators anymore. Especially for ones as old as yours. So what you'd need to do is replace the surge actuator with a similar A-frame actuator like the part # DM8609502 which fits a 2 inch ball and is designed for drum brakes. There isn't a similar shock available we can recommend either.
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  • A Frame Surge Brake Recommendation for Replacing Atwood Brake Actuator
    Thanks for the picture of your actuator that you are wanting to replace. The Demco Hydraulic Actuator part # DM8609502 would be a great option as it is designed to fit A-frames like yours. It has an 8k capacity, designed for a 2 inch hitch ball, and is designed for drum brakes.
    view full answer...
    Image 1 for
  • Is Manual Reverse Lockout as Effective as Solenoid For Demco Actuator A91
    There isn't an angle I can give you for when the lockout would be needed; however, if you want to be able to back up as needed you will need a reverse lockout with the Demco Hydraulic Brake Actuator # DM8609502. That said, the Manual Reverse Lockout Kit for Demco Hydraulic Trailer Brake Actuators # DM5939 is absolutely just as effective as the Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators - Non-Bypass # DM11993. The trade-off being the manual lockout just isn't as convenient...
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  • Dimensions of Demco Hydraulic Drum Brake A-Frame Actuator DM8609502
    Demco Hydraulic Drum Brake Actuator # DM8609502 is a standard 50-degree A-frame coupler-actuator rated for 8000-lbs trailer weight as you noted. It has a primed finish and is intended for weld-on installation. I went to our warehouse and measured the front-to-back length of the main triangular mounting plate, from the narrow forward end to the wider back end. This front-to-back length is 12-inches and this is shown on the linked photo along with some other key dimensions.
    view full answer...
    Image 1 for
  • Replacement Surge Brake Actuator For a 2003 Jayco Qwest Pop Up Camping Trailer
    It appears your 2003 Jayco Qwest uses an A-frame tongue which would require a Demco Hydraulic Brake Actuator # DM8609502 to be welded on in place of your Atwood 85736 master cylinder. We do have the Demco Hydraulic Brake Actuator # DM72VR which bolts to a 3" wide straight tongue if you do not have an A-frame tongue.
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  • Measurements of Demco Hydraulic Brake Actuator at Openings for Trailer Frame
    The Demco Hydraulic Brake Actuator # DM8609502 measures 4 inches at the smaller opening and 15.313 inches at the larger opening. This actuator is for drum brakes, is rated for 8,000 pounds towing, and is made in the USA.
    view full answer...
  • Replacement Actuator Recommendation for GDC Surge Actuator
    Since we don't carry any master cylinders that are a fit for the GDC brand the best solution we'd have would be to replace the entire actuator. Your picture is a bit fuzzy, but the best match we have is the Demco Actuator part # DM8609502 which fits the standard 50 degree angle A-frame trailer.
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    Image 1 for
  • Is it Possible to Lock Out the Demco Hydraulic Brake Actuator # DM8609502 For Use with Elec Brakes
    Basically you need to lock the outer sleeve of the Demco Hydraulic Brake Actuator # DM8609502 to the inner sleeve to prevent the two from moving. You could run a large bolt through all of the pieces to allow this to happen or some will weld the pieces together.
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  • Replacement Brake Actuator for Atwood 61101 on 2002 Jayco Eagle 12UDST
    The Demco Hydraulic Brake Actuator # DM8609502 will be a good replacement for your Atwood 61101. This is a surge actuator that is compatible with drum brakes.
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  • Replacement Brake Kit, Surge Actuator, and Bearing Kit for a 1988 EZ Loader Boat Trailer
    Hey Scott! Both the 3,500 lb and 3,750 lb brake assemblies work with a 10" x 2-1/4" drum so either one will fit with your hubs, but you can verify your axle capacity either on the sticker tag on the side of your EZ Loader Trailer, or by looking at the tag in the middle of your axle(s). One you know what weight capacity you have then I recommend getting Free-Backing brakes so you'll be able to back the trailer up. For 3,500 lb brake assemblies this will be part # AKFBBRK-35 and for 3,750...
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  • Replacement Coupler Recommendation for an Atwood 83000 on an A-Frame Trailer
    We do have one a-frame coupler, part # DM8609502 available and it is rated for 8,000 pounds, I think this would be the best fit for your trailer. The Titan coupler that you referenced is designed to bolt directly on a the trailer tongue. This is a weld on coupler and fits trailer with a 50 degree a-frame, which is the most common angle for a-frame trailers, and has a 2 inch trailer ball coupler. If you were to cut out your existing coupler, this one should weld on over the a-fame of...
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    Image 1 for
  • Can Surge Brakes be Added to 1996 Scamp Trailer that Weighs 2,000 lbs
    For a lighter A-frame trailer to add a surge brake setup the best option is the part # T2492800 which has a 6k capacity. But as long as you have properly rated brake assemblies on your trailer it will still work fine on a 2,000 lb trailer. I attached a help article that covers adding surge drum brakes to a trailer for you to check out as well.
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  • Parts Needed to Add 3,500 lb Hydraulic Drum Brakes For Demco Hydraulic Brake Actuator
    We can definitely put together a hydraulic drum brake kit for a 3,500 lb axle that will go with the Demco actuator, and there is indeed a lockout solenoid that is compatible with the actuator. I'll go ahead and make a list of the parts you need to get set up. - Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2" Ball # DM8609502 - Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators # DM11993 - Hydraulic Trailer Brake Kit - Uni-Servo - 10" - Left and Right Hand Assemblies...
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  • Replacement Surge Brake Actuator for 1972 Sprite Musketeer European
    I wasn't able to find a lot of information on the 1972 Sprite Musketeer European, but from old pictures it looks like you will need an A-frame brake actuator like the # DM8609502. If you're able to bolt one on, you could use the # DM8609101 instead which fits a 3" wide tongue. The pictures I was able to find were pretty low quality so I can't quite tell. If you also need replacement brake lines, you can use the Kodiak Hydraulic Brake Line Kit - Single Axle - 18' # 18SI-BLKIT. If you're...
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  • How To Add Surge Brakes to the Timbren 2,200 Lb Axle-Less Trailer Suspension System
    It sounds like you are referring to surge brakes in which case I do have an option for you to add these to the Timbren Axle-Less Trailer Suspension System part # ASR1THDS03. In order to do this you will need the Demco Hydraulic Brake Kit part # 40716-15 and two of the etrailer Trailer Hub and Drum Assembly part # AKHD-545-35-EZ-K. The rest of the parts you will need are brake lines, the Titan Hydraulic Brake Lines and Fittings part # T4829900 and a surge brake coupler, the Demco Hydraulic...
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  • Available A-Frame Trailer Couplers for Trailer with Electric Drum Brakes
    If your trailer uses electric drum brakes then you do not need a brake actuator-type a-frame coupler like # DM8609502. Instead you can use a standard a-frame coupler like # CA-5210-B since your brakes' power will come from the signal carried on the 7-way trailer wiring harness. You will want to choose a coupler that matches or exceeds the trailer's GVWR, its gross vehicle weight rating. The coupler referenced above is rated for 8000-lb trailers but we have lots of similar a-frame couplers...
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  • Can Electric Brakes Replace Hydraulic Brakes on a 1995 Jayco Eagle
    There is less maintenance with electric brakes compared to hydraulic brakes so switching to an electric braking system would help in that regard and since you already have a brake controller there isn't any additional major costs. You could also still use the same coupler you have now though it will still move in and out. Most people go ahead and change out the coupler too. We have a lot of A-frame couplers depending on the capacity needed. For the brakes the trailer will need to have...
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  • Demco Surge Actuator for Car Hauler with Drum Brakes
    We have several Demco surge actuators for drum brakes like the part # DM72VR which has a 7k capacity and is for a 2 inch hitch ball. Or if you have an A-frame trailer you'd instead want the part # DM8609502. To see all the options we have check out the link I attached on this page.
    view full answer...

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