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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. 2 Inch Ball Coupler
  6. 7000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler - 7,000 lbs

Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler - 7,000 lbs

Item # DM8509202
Our Price: $283.27
Brake Actuator
Shipping Weight: 36 lbs
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Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Bolt-on or weld-on application. 1-800-940-8924 to order Demco brake actuator part number DM8509202 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 - 2" Bulldog Coupler - 7,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (3)
  • Q & A (0)
  • Videos (1)
  • Photos

Demco Brake Actuator - DM8509202

  • Surge Brake Actuator
  • Drum Brakes
  • 2 Inch Ball Coupler
  • 7000 lbs GTW
  • Bolt-On
  • Weld-On
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Bolt-on or weld-on application.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Bulldog Collar-Lok coupler fits tightly around hitch ball for secure connection
    • Heavy-duty design is great for utility, livestock, cargo, and construction trailers
    • Pin-style fastener holds collar in place around base of hinged ball socket
  • 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
  • Primed finish
  • Bolt-on or weld-on installation
    • Requires 1/2" x 4-1/2" Grade-5 bolts (not included) for bolt-on mounting
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Ball size: 2"
  • Gross towing weight: 7,000 lbs
  • Maximum tongue weight: 700 lbs
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA91
  • 1-Year warranty


Note: Because this actuator does not include a 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.



8509202 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - 2" Ball Bull Dog Coupler - 7,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler - 7,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Demco Brake Actuator - Surge Brake Actuator - DM8509202

Hi there, I'm Michael with etrailer.com. Today we're gonna take a quick look at this Demco hydraulic brake actuator. This is a model DA91 surge type hydraulic actuator that's going to activate your trailer's hydraulic drum brakes when your tow vehicle slows or stops. The momentum of the trailer is going to activate to ensure that your hydraulic lines are putting pressure to your drum brakes to make sure that they're applying. This will be a bolt on or a weld on installation. Will install onto a straight three-inch wide trailer tongue.

If you are bolting it on you will require a 1/2 inch by 4-1/2 inch grade five bolts, which are not included as you will have to provide those yourself. But this is constructed here in the USA or it's made here in the USA with a heavy duty steel construction. It's gonna provide a gross towing weight capacity of 7,000 pounds and a maximum tongue weight of 700 pounds. Our bulldog collar lock coupler here is going to fit tightly over a two inch hitch ball for a nice secure connection. We've got the heavy duty design that's going to create a nice fit for your utility, livestock, cargo and construction type trailers.

We have the pin style fastener here that's gonna hold the collar in place around the hinged ball socket there. So when we get connected we can just simply push that forward or when we want to disconnect, we can pull that back. Give you a different perspective on that. So you push in there, just secure it in place and then you can pass your pin through to make sure that it's not going to come disconnected. This does have a composite master cylinder that's gonna be very durable and efficient.

It's constructed of a glass reinforced nylon so it's gonna resist rust and corrosion. You also have a large reservoir that's gonna provide increased capacity for your brake fluid and then an automotive style diaphragm cap here that creates a completely enclosed system to help prevent any contamination of your fluid. We also have acetol copolymer linings that are going to provide a nice smooth operation as the actuator telescopes in and out. This does have a nice primed finish, as you can see. So it is gonna be ready to be painted the color of your choosing.

And of course we do have our breakaway here. This does have the snap hook on the safety cable. That's gonna ensure a nice secure connection to your breakaway. The lever here, if you were to become disconnected at the coupler, this is gonna stay connected and it's gonna pull that lever. Make sure that your trailer's brakes activate so you don't have to deal with a trailer that's propelling itself down the road, bringing it to a nice safe stop. Now because this actuator does not include a reverse lockout, it is recommended that you equip your trailer with free backing brakes so you can drive in reverse without the actuator triggering your trailer brakes because that would essentially cause the unit to telescope in which would apply your brakes. So free backing brakes are a great way to go. So that completes our look for today. Again, I'm Michael with etrailer.com. Thanks for watching.

Customer Satisfaction Score:


Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler - 7,000 lbs - DM8509202

Average Customer Rating:  4.7 out of 5 stars   (3 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and a primed finish. Bulldog Collar-Lok coupler provides tight, solid connection with hitch ball and is great for heavy-duty towing. Bolt-on or weld-on application.

by:

I ordered a brake actuator for a trailer that we use at my work. The original actuator showed to be available when I purchased it, but actually had been discontinued. A lady, whose name I will not mention, was very helpful and knowledgeable when explaining the situation to me. She offered a replacement to the original one, and even helped me with the cost. The alternatives were a little more expensive. Thank you Diana H. for your expertise and kindness!



by:

My trailer coupler came with instructions. The hydraulic brake actuator coupler came with no instructions. Wish it were the other way around.



by:


3
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See what our Experts say about this Demco Brake Actuator

  • Is There a Weld-On Demco Coupler for 2 Hitch Ball With Drum Brakes
    We do have an option for a weld-on coupler for drum brakes, but there is not a version of the Demco Hydraulic Trailer Brake Actuator 8605001 that is a weld-on option. The closest that can be welded on is the Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler - 7,000 lbs # DM8509202. The Demco actuator that can be welded on is very similar but has a higher 7,000 lb towing/700 lb tongue weight capacity.
    view full answer...
  • Can Reverse Lockout Solenoid Be Installed on DA91 Demco Hydraulic Brake Actuator
    Yes, you can definitely add a solenoid to the Demco Hydraulic Brake Actuator # DM8509202 so your brakes don't activate when you put your vehicle and trailer in reverse. What you're looking for is the Reverse Lockout Solenoid # DM11993. Just be sure to install a 5-Way connector on both your trailer and your tow vehicle so you can get that reverse function to the solenoid. If you don't already have these then we have the Hopkins Kit # HM47890 you can use to accomplish this.
    view full answer...
  • Can Demco Hydraulic Brake Drum Brake Actuator be Used With Pintle Hitch
    You can use the Demco Hydraulic Brake Actuator - Drum - Primed - 2" Bulldog Coupler # DM8509202 with a pintle hitch ball combo like the B&W Tow & Stow Pintle Hook with 2" Ball # BWTS10055 or Buyers Combination Pintle Hook with 2" Ball # 337RM62000. The metal portion of the actuator won't interfere.
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Laura H
Updated by:
Laura H
Employee Michael B
Installed by:
Michael B

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