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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. 12500 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 12,500 lbs

Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 12,500 lbs

Item # DM8104831
Our Price: $362.95
Brake Actuator
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Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 12,500 lbs Drum Brakes DM8104831
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Surge actuator features a corrosion-resistant composite master cylinder and durable zinc plating, making it perfect for marine use. Adjustable down channel lets you mount coupler attachments (sold separately) in 1 of 3 positions. 6-Hole bolt-on case. 1-636-306-4830 to order Demco brake actuator part number DM8104831 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 - 8" Adjustable Channel Down - 12,500 lbs. Brake Actuator reviews from real customers.
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Demco Brake Actuator - DM8104831

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • 12500 lbs GTW
  • Bolt-On
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge actuator features a corrosion-resistant composite master cylinder and durable zinc plating, making it perfect for marine use. Adjustable down channel lets you mount coupler attachments (sold separately) in 1 of 3 positions. 6-Hole bolt-on case.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Adjustable channel has 3 different mounting positions for coupler (sold separately)
    • Channel-down design allows for greater drop
  • 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
    • 6-Hole case has 3 mounting holes on each side of actuator - 2 in the front and 1 in the back
    • 1/2" x 4-1/2" Grade-5 bolts (not included) required for mounting
  • Made in the USA


Specs:

  • Application: trailers with hydraulic drum brakes
  • Gross towing weight: 12,500 lbs
  • Maximum tongue weight: 1,250 lbs
  • Channel width: approximately 3"
  • Channel height: 8"
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA10
  • 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 3 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.


This actuator is great for tall trailers. This is because the adjustable channel is positioned so that the mounted coupler can sit below the actuator tube, allowing for a greater drop than with a standard center-mounted channel. As a result, you can line up your tall trailer with your tow vehicle's hitch for a level setup.


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.



8104831 Demco DA10 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Down - 12,500 lbs

Installation Details DM8104831 Installation instructions



Video of Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 12,500 lbs

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




Video Transcript for Demco Brake Actuator - Surge Brake Actuator - DM8104831 Review

Speaker 1: Today we're going to take a look at the Demco Hydraulic Drum Brake Actuator, with the eight inch adjustable channel down and a 12,500 pound weight capacity. Now this hydraulic actuator will activate your trailer brakes when your tow vehicle slows or stops. Basically when you apply the brakes in your tow vehicle, deceleration occurs, and the momentum will push the trailer toward the rear of your vehicle. So with surge break systems, what happens is the actuator's triggered and as your trailer moves forward, once your tow vehicle starts to slow down, when this happened, this actuator will contract or apply force to the inside of this actuator to the master cylinder. This in turn supplies the hydraulic pressure to engage your trailer breaks. Right up here you can see is an adjustable channel.

It has three different mounting positions for your coupler. Now the coupler is not included, that is sold separately. And if you notice it is a channel down design which allows for a greater drop.This whole unit is zinc plated to offer excellent corrosion resistance. Has a 500 hour salt spray rating, so it's great for marine applications. On the inside it does use a composite master cylinder, which is very durable and efficient.

It's a glass reinforced nylon constructions, resist rust and corrosion. Has a very large reservoir so it provides increased capacity for the brake fluid. And at the top right here, you can see if I unscrew it, it's an automotive style diaphragm cap that'll help create completely enclosed system to help prevent contamination of the fluid.And on the inside of this actuator where the . this will slide, they use an inaudible 00:01:26 lining, provides a nice smooth operation as this actuator will telescope in and out. If you notice the cable right here, it is a break away cable, that's all connected and included.

So you just hook this to your tow vehicle.Now this is a heavy duty steel construction. It is a bolt on installation. Let me just hook this back up here. It is a bolt on installation, you can see it has a six hole design case. It has three mounting holes on each side of the actuator.

There's two in front and one in the back. It does require half inch diameter by four and a half inch long grade five bolts for mounting this, they are not included. This part is made in the USA. Again this is for an application with trailers with hydraulic drum brakes. Gross towing weight capacity on this actuator is 12,500 pounds. Maximum ton weight is 1,250 pounds. Now the channel width, inside to inside is right at approximately three inches. Channel height, going to be right at eight inches. And this is designed to mount on a straight three inch wide trailer tongue. This also goes by model number of DA10. And one last note on this actuator, because this actuator does not include a reverse lockout, right here on the back, it is recommended that you hook your trailer with three backing brakes so that you can drive in reverse without the actuator triggering your trailer brakes.But that should do it for the review on the Demco Hydraulic Drum Brake Actuator, with the eight inch adjustable channel down and a 12,500 pound weight capacity.


Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Zinc - 8" Adjustable Channel Down - 12,500 lbs - DM8104831

Average Customer Rating:  4.5 out of 5 stars   (2 Customer Reviews)

Surge actuator features a corrosion-resistant composite master cylinder and durable zinc plating, making it perfect for marine use. Adjustable down channel lets you mount coupler attachments (sold separately) in 1 of 3 positions. 6-Hole bolt-on case.

by:

Was an exact replacement part. Worked g reat




by:



2
2

See what our Experts say about this Demco Brake Actuator




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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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