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

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

Item # DM8759138
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Brake Actuator
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Demco Drum Brakes Brake Actuator - DM8759138
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Surge-type actuator features a corrosion-resistant composite master cylinder and a durable black powder coat finish. Adjustable down channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-on application. 1-636-306-4830 to order Demco brake actuator part number DM8759138 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 Down - 8,000 lbs. Brake Actuator reviews from real customers.
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Demco Brake Actuator - DM8759138

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

Surge-type actuator features a corrosion-resistant composite master cylinder and a durable black powder coat finish. Adjustable down channel lets you mount different coupler attachments (sold separately) in 1 of 3 positions. Bolt-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)
    • Channel-down design allows for greater drop
  • 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 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.


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.



8759138 Demco DA91 Hydraulic Trailer Brake Actuator for Drum Brakes - Channel Down - 8,000 lbs





Video of Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Down - 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 - DM8759138 Review

Speaker 1: Today we're taking a look at a Demco Hydraulic Brake Actuator. This hydraulic actuator activates your trailer's brakes when your tow vehicle slows or stops. The unit features an adjustable channel that has three different mounting positions for your coupler. Couplers are sold separately. It does feature the channel down design, which allows for a greater drop.Internally, it features a composite master cylinder that's very durable and efficient. It's a glass reinforced nylon construction that's designed to resist rust and corrosion.

It has a nice, large reservoir that provides increased capacity for brake fluid. Your brake fluid cap is right here. This is an automotive style diaphragm cap that creates a completely enclosed system to help prevent contamination of the fluid.As the actuator telescopes in and out, it's going to offer smooth operation and that's due to specialized lining that this actuator features. The breakaway is included. That's your cable with a hook attached to it.

So, this would attach to your tow vehicle. In the event where the vehicle separates from your trailer, it would pull this cable, which would then activate this lever, activating the trailer brake. So the breakaway is included with this actuator. It's a heavy duty steel construction with a black powder coated finishing on it to resist rust and corrosion.It's a bolt on installation. So, you've got your mounting holes and your mounting bracket here at the base of the unit.

It attaches at three points. Three on each side. It does require a half inch by four and a half inch grade five bolts for bolt on mounting. Those are sold separately. The product is made in the USA.

This is designed for trailers with hydraulic drum brakes. It features a gross towing weight of 8,000 pounds, with a maximum ton weight of 800 pounds.The channel width, that's this portion right here, internally, is approximately three inches. The channel bracket height is eight inches. This is designed to fit onto a straight three inch wide trailer tongue. The model number is DA91.Now, please note that this actuator is compatible with the Demco Manual Reverse Lockout Kit. Part number 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. Then, here on the back side, you'll see the cylinder and the connection point for the brake line. That's going to do it for today's look at the Demco Hydraulic Brake Actuator.


Customer Reviews

Demco Hydraulic Brake Actuator - Drum - Black - 8" Adjustable Channel Down - 8,000 lbs - DM8759138

Average Customer Rating:  4.8 out of 5 stars   (4 Customer Reviews)

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

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Fast service and quality product




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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Laura H
Updated by:
Laura H
Employee Cole B
Installed by:
Cole B

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