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
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Brake Actuator
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Shipping Weight: 53 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. Call 800-298-1624 to order Demco brake actuator part number DM8609502 or order online at etrailer.com. Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Hydraulic Brake Actuator - Drum - Primed - A-Frame - 2" Ball - 8,000 lbs. Brake Actuator reviews from real customers.
  • All Info
  • Reviews (6)
  • Q & A (11)
  • Photos
  • Why etrailer?

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.


Features:

  • 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


Specs:

  • 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 Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (6 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.

- DM8609502
by:

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


Comments
Great product!!! Would reccomend
Daniel - 07/06/2021


- DM8609502
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!



- DM8609502
by:

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



- DM8609502
by:

Super replacement and much cheaper than the bulldog style.



- DM8609502
by:



- DM8609502
by:


6
6

Ask the Experts about this Demco Brake Actuator

  • 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...
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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 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...
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  • 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...
  • 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...
  • 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...
  • 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...
    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...
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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.
    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...
    view full answer...
    Image 1 for
  • 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 the Dexter Trailer Hub and Drum Assembly part # 84546UC3-EZ (2). 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 Brake...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Installed by:
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Employee Laura H
Updated by:
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Employee Hannah L
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