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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. 20000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Zinc - 12" Adjustable Channel Center - 20,000 lbs

Demco Hydraulic Brake Actuator - Drum - Zinc - 12" Adjustable Channel Center - 20,000 lbs

Item # DM8202521
Our Price: $496.93
Brake Actuator
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Shipping Weight: 72 lbs
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Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating, making it perfect for marine use. Adjustable channel lets you mount coupler attachments (sold separately) in 1 of 5 positions. Bolt-on application. 1-800-496-5010 to order Demco brake actuator part number DM8202521 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 - Zinc - 12" Adjustable Channel Center - 20,000 lbs. Brake Actuator reviews from real customers.
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Demco Brake Actuator - DM8202521

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • 20000 lbs GTW
  • Bolt-On
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and durable zinc plating, making it perfect for marine use. Adjustable channel lets you mount coupler attachments (sold separately) in 1 of 5 positions. Bolt-on application.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Adjustable channel has 5 different mounting positions for coupler (sold separately)
  • Zinc plating offers excellent corrosion resistance
    • 500-Hour salt spray rating - great for marine applications
  • 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
  • Heavy-duty steel construction
  • Bolt-on installation
    • Requires 1/2" x 4-1/2" Grade-5 bolts (not included) for mounting
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Gross towing weight: 20,000 lbs
  • Maximum tongue weight: 2,000 lbs
  • Channel width: approximately 3"
  • Channel height: 12"
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA20
  • 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.


Adjustable Channel Design

The adjustable channel on this trailer brake actuator allows for ultimate versatility. Mount almost any type of coupler (sold separately) - from a standard ball coupler to a lunette ring or clevis attachment - to fit your specific application. In addition, the 5 mounting positions on the channel let you adjust the height of the coupler. Just place the coupler so that it matches the height of the ball mount or other hitch attachment on your tow vehicle and you will be able to tow your trailer levelly.


Sturdy, Corrosion-Resistant Construction

Made of sturdy steel, this hydraulic trailer brake actuator features a durable zinc coating that is designed to limit rust and corrosion. This zinc coat has a 500-hour salt spray rating, making the actuator perfect for marine use. In addition, the composite master cylinder is made of corrosion-resistant glass-reinforced nylon to further ensure durability for marine applications.



8202521 Demco DA20 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Center - 20,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Zinc - 12" Adjustable Channel Center - 20,000 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 - DM8202521

Jeff: Hello, everybody. This is Jeff at etrailer.com. Today, we're going to take a look at this Demco 12-inch Adjustable Channel Center Hydraulic Drum Brake Actuator with a 20,000 pound weight capacity. Now this hydraulic actuator will activate your trailer's brakes when your tow vehicle slows or stops. Basically what happens is when you apply the brakes in your tow vehicle, the deceleration occurs and the momentum will push your trailer toward the rear of your vehicle. So with the surge brake system, this actuator is then triggered as your trailer moves forward once the tow vehicle starts to slow down.

And when this happens is the inner portion of this actuator will actually slide back or contract and applies force to the master cylinder in the back here and this in turn supplies the necessary hydraulic pressure to engage your trailer's brakes. Now, this actuator uses a nice acetyl copolymer lining around the inner slide. It provides a nice smooth operation as the actuator will telescope in and out.This one is an adjustable channel. It has five different mounting positions for your coupler. Now the coupler is not included, we do sell that separately.

This does have a nice zinc plating on it, gives you excellent corrosion resistance. Has a 500 hour salt spray rating, so it is great for marine applications. It is a heavy duty steel construction. Now in the back here, we mentioned the master cylinder, which is underneath there in the very rear. It's a composite master cylinder.

It's very durable and efficient. It's a glass reinforced nylon construction, helps resist rust and corrosion, and it's a nice large reservoir, so it provides increased capacity for the brake fluid. If you notice on the top here where you put your brake fluid in, it's an automotive style diaphragm cap, which will create a completely enclosed system, help prevent contamination of the brake fluid. Now, this does include this breakaway cable and hook with the latch on it.You can see here's your hook with the latch, and then here's your cable. Now this is required by law because it prevents a trailer runaway situation.

So basically what you'll do is take this hook and the latch, hook this to your tow vehicle and then what'll happen is by chance, if your trailer gets disconnected from your tow vehicle, it'll stretch this cable, which will activate the lever and that lever applies the pressure of the master cylinder back here, which again, will apply the brakes on the trailer to prevent a runaway situation. So it is a safety feature that is required by law and it will be included with this actuator.Now this is a bolt on installation. You can see the holes right here at the bottom for installing it. It is designed to mount onto a straight three inch wide trailer tongue. This actuator is made in the USA. This is for trailers with hydraulic drum brakes. Gross towing weight capacity is 20,000 pounds. Maximum tongue weight capacity is 2000 pounds. Now the channel width, which is measured inside to inside, it's going to be approximately about three inches. Channel height, bottom to the very top, let's do it this way, is right at 12 inches. This does go by the model number of DA20. And one last note I do want to mention on this actuator is because this actuator does not include a reverse lockout back here on the master cylinder, it is recommended that you hook the trailer with a reverse lockout solenoid that will screw onto the master cylinder back here or free backing brakes on your trailer so that you can drive in reverse without this actuator triggering your trailer's brakes.But that should do it for the review on the Demco 12-inch Adjustable Channel Center Hydraulic Drum Brake Actuator with a 20,000 pound weight capacity.

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Info for this part was:

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

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