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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. Bolt-On
  7. Weld-On
Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Center - 8,000 lbs

Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Center - 8,000 lbs

Item # DM8759122-30
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Brake Actuator
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Demco Brake Actuator - DM8759122-30
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Surge-type actuator features a corrosion-resistant composite master cylinder and durable black powder coat finish. Adjustable channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-on or weld-on application. 1-636-306-4830 to order Demco brake actuator part number DM8759122-30 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 - Black - 8" Adjustable Channel Center - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (6)
  • Q & A (0)
  • Videos (1)
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Demco Brake Actuator - DM8759122-30

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • Bolt-On
  • Weld-On
  • 8000 lbs GTW
  • No Lockout
  • Straight Tongue Coupler
  • Demco

Surge-type actuator features a corrosion-resistant composite master cylinder and durable black powder coat finish. Adjustable channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-on or weld-on application.


Features:

  • Hydraulic actuator activates trailer's brakes when tow vehicle slows or stops
  • Adjustable channel has 3 different mounting positions for coupler (sold separately)
  • 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
  • Black powder coat finish resists corrosion
  • 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
  • Gross towing weight: 8,000 lbs
  • Maximum tongue weight: 800 lbs
  • Channel width: approximately 3"
  • Channel height: 8"
  • Mounting: straight, 3" wide trailer tongue
  • Model number: DA91
  • 1-Year warranty


Note: This actuator is compatible with the Demco manual reverse lockout kit (DM5939). 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.


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.


Sturdy, Corrosion-Resistant Construction

Made of sturdy steel, this hydraulic trailer brake actuator features a durable black powder coat finish that resists corrosion. In addition, the composite master cylinder is made of corrosion-resistant glass-reinforced nylon.



8759122-30 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Center - 8,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Center - 8,000 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 - DM8759122-30

Hello everybody, this is Jeff at etrailer.com. Today, we're gonna take a look at the Demco eight inch Adjustable Center Channel Hydraulic Drum Brake Actuator, has an 8,000 pound gross towing weight capacity. Now, this hydraulic actuator will activate your trailer brakes when your tow vehicle slows or stops. Basically, what happens is when you apply the brakes in your tow vehicle, deceleration occurs, and the momentum will push your trailer towards the rear of your tow vehicle. So with the surge brake system, the actuator is triggered as your trailer moves forward once the tow vehicle starts to slow down. So when this happens, the inner portion of the actuator right here will contract and apply force to the master cylinder at the back here, and then this in turn supplies the necessary hydraulic pressure to engage your trailer's brakes.

This one here happens to use an acetal copolymer lining around the actuator inner portion that goes into the outer portion, this will provide a nice smooth operation as the actuator telescopes in and out. This one has have an adjustable center channel, has three different mounting positions for your coupler. Now, the coupler's not included, that would be sold separately. This does have a nice black powder coat finish to it to resist rust and corrosion. It is a heavy-duty steel construction.

On the very back here, they do use a composite master cylinder, which is durable and efficient. It's a glass-reinforced nylon construction that'll resist rust and corrosion, has a very large reservoir, which provides increased capacity for your brake fluid, and if you noticed on the top here, the cap that you'll open to put the brake fluid in, uses an automotive-style diaphragm cap, which will create completely enclosed system, helps prevent contamination to brake fluid. This does include the breakaway cable and a hook that is required by law, and what this does is prevent a trailer runaway situation. Basically, what you'll do is when you hook your trailer up to your tow vehicle, you do wanna take this hook, hook it to your tow vehicle, so in case this happens to come detached from your tow vehicle, this cable will pull on this lever, which the lever will activate the master cylinder to apply pressure to the brakes, prevents a runaway situation. Now, this is a bolt-on or weld-on installation.

Go ahead and put the this back here, there we go. It is a bolt-on or weld-on installation, it does mount to a straight three inch wide trailer tongue. This part is made in the USA. Application on this is for trailers with hydraulic drum brakes. We mentioned the gross towing weight capacity is 8,000 pounds, maximum tongue weight capacity, 800 pounds.

Now, the channel up front here, the width of it, which will measure the inside, is gonna be right at three inches. The overall height of it, bottom to the top is right at eight inches tall. Now, this part also goes by a model number DA91. One last note I do wanna mention on this actuator is because this does not include a reverse lockout, it is recommended that you equip your trailer with either a reverse lockout solenoid that installs in the back here, or to have free backing brakes on your trailer, so that you can drive in reverse without the actuator triggering your trailer's brakes. But that should do it for the review on this Demco eight inch Adjustable Center Channel Hydraulic Drum Brake Actuator with the 8,000 pound gross towing weight capacity..


Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Center - 8,000 lbs - DM8759122-30

Average Customer Rating:  4.8 out of 5 stars   (6 Customer Reviews)

Surge-type actuator features a corrosion-resistant composite master cylinder and durable black powder coat finish. Adjustable channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-on or weld-on application.

by:

Thanks for your great service and easy transaction buying at etrailer.
Attached is a picture of the product already installed and for the hitch that I bought in past from etrailer store.




by:

Perfect as always




by:

Really BIG...Heavy, solid.. seems a bit overkill on my car trailer but it works. Tends to clunk when pulling away from a stoplight..




by:

Everyone I spoke to was super helpful. My original order was back-ordered, I was able to change my order with one phone call.




by:

I am very excited to find this site. It has so many of the items we use, ordering is simple, pricing is great. Thank you!




by:

The product was delivered as promised and is of exceptional quality.



6
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Info for this part was:

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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