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  1. Brake Actuator
  2. Demco
  3. Surge Brake Actuator
  4. Drum Brakes
  5. Channel Only
  6. 8000 lbs GTW
Demco Hydraulic Brake Actuator - Drum - Primed - 8" Adjustable Channel Center - 8,000 lbs

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

Item # DM8759122
Our Price: $200.40
Brake Actuator
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Shipping Weight: 32 lbs
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DM8759122 - Bolt-On,Weld-On Demco Brake Actuator
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Surge-type actuator features a corrosion-resistant composite master cylinder and a primed 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 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 - 8" Adjustable Channel Center - 8,000 lbs. Brake Actuator reviews from real customers.
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  • Reviews (5)
  • Q & A (0)
  • Videos (1)
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Demco Brake Actuator - DM8759122

  • Surge Brake Actuator
  • Drum Brakes
  • Channel Only
  • 8000 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. 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
  • 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
  • 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: 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.



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





Video of Demco Hydraulic Brake Actuator - Drum - Primed - 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 Demco Brake Actuator - Surge Brake Actuator - DM8759122 Review

Today, we're going to take a look at the Demco Hydraulic Drum Brake Actuator with the 8 inch adjustable channel at the center position and an 8000 pound weight capacity. This hydraulic actuator will activate your trailer's brakes when your tow vehicle slows or stops. On the front here, you can see it has this adjustable channel, has three different mounting positions for your coupler. The center position basically means that this channel is centered right in the actuator. On the very back here, underneath on the inside there, there's a composite master sona 00:30, which is very durable and efficient. It's made of a glass reinforced nylon, helps resist rust and corrosion.

It has a very large reservoir, so provides increased capacity for your brake fluid. On the top right here, you can see they use an automotive-style diaphragm cap. That helps create a completely enclosed system to help prevent any contamination of the brake fluid. This is made of a heavy-duty steel construction. On the inside of this actuator, they use an acetyl co-polymer lining, and that'll help provide a nice, smooth operation as this actuator will telescope in and out. The breakaway right at the top, as you can see, is all included.

On the end right here, you can see they use a snap hook, has a snap on it, on the safety table, and this is the ensure a secure connection for you breakaway lever. It does have a nice prime finish to it. Now, this is a inaudible 01:23 installation, depends on whichever way you want to install it. If you do do a bolt-on installation, it does require for mounting the half inch by four and a half inch grade five bolts to install this. This part is made in the USA. Again, the application for this is for trailers with hydraulic drum brakes.

Gross towing weight capacity is 8000 pounds. Tongue towing weight is 800 pounds. The channel width, which is the inside width of the channel right up here, is going to be right at three inches. The channel height, which will be from the bottom to the very top, is going to be right at eight inches. This actuator is designed to mount on a straight, three inch wide trailer tongue, and this also goes by the model number of DA91.

One last thing I do want to mention is because this actuator does not include a reverse lockout, it is recommended that you equip your trailer with three backing brakes so that you can drive in the reverse without the actuator triggering your trailer brakes. That should do it for the review on the Demco Hydraulic Drum Brake Actuator with the 8 inch adjustable channel at the center position, and an 8000 pound weight capacity.


Customer Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (5 Customer Reviews)

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

by:

It does the Job. I tried to talk them in to going with an electric over hydraulic Disc system but the did not want to spend the money with this set up at least is has some brakes.




by:

Everything arrived in advance of expected delivery date and customer service was excellent.




by:

Great




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5
5

See what our Experts say about this Demco Brake Actuator

  • What Is The Mounting Bolt Pattern Of The Demco Hydraulic Brake Actuator DM8759122-30?
    The Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Center - 8,000 lbs # DM8759122-30 you were looking at measures 3" between the two front holes, 9.5" between the second and third hole, and 12.5" between the first and last hole as you can see in the included diagram.
    view full answer...
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  • Can Lock Out Solenoid Be Added to Demco Hydraulic Brake Actuator
    I spoke with my contact at Demco regarding the Hydraulic Brake Actuator # DM8759122 referenced in your question. He stated that the Demco Solenoid Kit # DM5404 can indeed be used with this actuator so the trailer brakes do not activate when shifting into reverse This has a gross towing weight capacity of 8,000 pounds and will mount to straight, 3 inch wide trailer tongues. I have attached a short video demonstration on this product for you to check out.
    view full answer...
  • Compatibility Of Demco Hydraulic Brake Actuator with Lunette Ring and Reverse Lockout
    The Demco Hydraulic Brake Actuator, Drum, Black, 8 Inch Adjustable Channel # DM8759122-30 that you referenced is designed for trailers weighing up to 8,000 pounds with 800 pound tongue weights. This brake actuator will work well for your 4,600 pound trailer. The # DM8759122-30 has a 3 inch wide channel on the front, and the Demco Lunette Ring # DM09557-97 is designed to mount in a 3 inch wide channel, so it will work well for you on the Demco # DM8759122-30 actuator. This # DM09557-97...
    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 Jeff D
Installed by:
Jeff D
Employee Laura H
Updated by:
Laura H

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