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

Item # DM8609502
Our Price: $320.99
Brake Actuator
Shipping Weight: 52 lbs
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Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. EZ-Latch coupler latch is easy to use. Welds onto a 50-degree A-frame trailer. 1-800-940-8924 to order Demco brake actuator part number DM8609502 or order online at 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 (13)
  • Q & A (0)
  • Photos

Demco Brake Actuator - DM8609502

  • Surge Brake Actuator
  • Drum Brakes
  • 2 Inch Ball Coupler
  • 8000 lbs GTW
  • Weld-On
  • No Lockout
  • A-Frame Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. EZ-Latch coupler latch is easy to use. Welds onto a 50-degree A-frame trailer.


  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Ez-latch coupler latch is secure and easy to use
  • Composite master cylinder is durable and efficient
    • Glass-reinforced nylon construction resists rust and corrosion
    • Large reservoir provides increased capacity for brake fluid
    • Automotive-style diaphragm cap creates completely enclosed system to help prevent contamination of fluid
  • Acetal copolymer lining provides smooth operation as actuator telescopes in and out
  • Breakaway included
    • Snap hook on safety cable ensures secure connection to breakaway lever
  • Heavy-duty steel construction
  • Weld-on installation
  • Primed finish
  • Made in the USA


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

Note: This actuator is compatible with the Demco lockout solenoid (DM11993). 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.

When you apply the brakes in your tow vehicle, deceleration occurs and momentum pushes your trailer toward the rear of your vehicle. With surge brake systems, the hydraulic actuator is triggered as your trailer moves forward, once your tow vehicle starts to slow down. When this happens, the actuator contracts, applying force to its master cylinder. This in turn supplies the necessary hydraulic pressure to engage your trailer's brakes.

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

Customer Satisfaction Score:

Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2" Ball - 8,000 lbs - DM8609502

Average Customer Rating:  4.8 out of 5 stars   (13 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. EZ-Latch coupler latch is easy to use. Welds onto a 50-degree A-frame trailer.


Great design. Easy to install. Very sturdy and excellent updated features


Have not installed yet, but the product appears to be of high quality and heavy weight steel. Looks great.. would reccomend to anyone!



Great product!!! Would reccomend


Perfect , the delivery was faster than expected. The product is real good quality.
Thanks for your great service.


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


Great hitch


Super replacement and much cheaper than the bulldog style.


Excellent product. Exact product as shown. Quality materials. Quick to ship and receive.



Very happy with my purchase. It was a good price, easy to order and was received in short time. Thank you!


Good product excellent business





See what our Experts say about this Demco Brake Actuator

  • 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...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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.
    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.
    view full answer...
    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.
    view full answer...
  • 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
  • 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
  • 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.
    view full answer...
  • 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...
    view full answer...
    Image 1 for Image 2 for
  • 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...
  • 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...
    view full answer...
  • 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...
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...

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