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Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi

Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi

Item # K71-651

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Brake Actuator

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K71-651 - 1600 psi Dexter Axle Electric-Hydraulic Brake Actuator
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  • Electric-Hydraulic Brake Actuator
  • Disc Brakes
  • Dexter Axle
  • 1600 psi
Electric-hydraulic brake actuator works with your brake controller (sold separately) to activate your trailer's disc brakes. Vented housing releases heat and moisture. Enhanced wiring protection safeguards internal electronics. Call 800-298-8924 to order Dexter Axle brake actuator part number K71-651 or order online at etrailer.com. Free expert support on all Dexter Axle products. Guaranteed Lowest Price and Fastest Shipping for Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi. Brake Actuator reviews from real customers.


  • All Info
  • Reviews (17)
  • Q & A (138)
  • Videos (3)
  • Photos
  • Why etrailer?

Dexter Axle Brake Actuator - K71-651

Electric-hydraulic brake actuator works with your brake controller (sold separately) to activate your trailer's disc brakes. Vented housing releases heat and moisture. Enhanced wiring protection safeguards internal electronics.


Features:

  • Electric-over-hydraulic brake actuator activates your trailer's hydraulic brakes when you apply the brakes in your vehicle
    • Brake controller (sold separately) is required to send signal from tow vehicle to actuator when brakes are applied
    • 7-Way trailer connector (sold separately) is needed to transmit signal from brake controller
  • Improved functionality when compared with surge brake couplers
    • Faster response time - activates when you apply brakes in tow vehicle, as opposed to when trailer pushes against hitch ball
    • No need to manually lock out brakes when you back up
    • Trailer brakes can be intentionally activated when you reverse
    • Manual override on brake controller can be activated so you can engage the trailer brakes without having to apply your vehicle brakes
  • Vented design releases pressure, moisture, and heat to protect the internal components
    • Allows actuator to be mounted in places where most actuators would overheat
  • Electronic, proportional pressure valve ensures smooth, even braking
  • Self-priming pump reduces time needed for brake bleeding
  • Enhanced wiring detects dangerous current levels and shuts down actuator electronics in the event of a surge
  • Durable aluminum housing and stainless steel fasteners resist corrosion
  • Goretite seals protect the circuit board from the elements
  • Compatible with most 9-amp-hour-battery breakaway kits (sold separately)
  • DOT compliant
  • Unit installs on trailer frame and connects to trailer's wiring and hydraulic brake lines (sold separately)
  • Made in the USA


Specs:

  • Application: single-, tandem-, and triple-axle trailers with disc brakes
  • Maximum output pressure: 1,600 psi
  • Dimensions: 11" long x 6" wide x 7" tall
  • Distance between mounting holes (center to center):
    • 2-1/2" Between holes on same side of bracket
    • 9-13/16" Between holes on opposite sides of bracket
  • Mounting hole diameter: 1/4"
  • Hydraulic port size: 3/16"
  • Power: 12V DC
  • Wire configuration:
    • Black: 12-volt power
    • Blue: brake controller
    • Yellow: breakaway
    • White: ground
  • 2-Year limited warranty


Dexter DX Series Actuator

The Dexter DX Series electric-over-hydraulic actuator is a dependable choice for your trailer braking needs. It is capable of up to 1,600 psi of pressure output to provide strong stopping power for your disc brakes. The lightweight, corrosion-resistant housing has fins and vents built in to shed excess heat. Inside the housing, the unit features enhanced wiring protection, allowing it to detect dangerous current levels to prevent damage from surges or improper wiring. Another internal highlight is the solid-state electronics, which regulate the actuator's electrical components to ensure consistent performance. All of this is cleanly secured within the aluminum housing by stainless steel fasteners, while Goretite seals protect the internal electronics from exposure to water and other elements. The DX series also remains compatible with most aftermarket and OEM-integrated electric brake controllers on the market.


Electric-Over-Hydraulic Actuator vs. Standard Surge Brake Actuator

With the DX series electric-over-hydraulic actuator, you can get all the benefits of towing with an electric brake controller while using hydraulic brakes. Because this actuator will activate according to the setting you have chosen for your brake controller (sold separately), you will have more control over when and how your trailer brakes engage. Depending on the features of your brake controller, you may be able to control both the rate and intensity with which your trailer's brakes activate. If you have a proportional brake controller, your brakes will be activated with an intensity that matches the braking speed and power of your tow vehicle.


This gives you multiple benefits over a standard surge-type actuator. Your trailer's braking will be tied to the braking activity of your vehicle instead of the momentum of your trailer. This will help to limit stress on the tow vehicle, and it will give you the ability to reverse without the trailer's brakes kicking in.


You can also activate the manual override on your brake controller to send out full braking power to the actuator. This will activate your trailer's brakes with full intensity. This is especially useful when traveling down steep hills with a fully loaded trailer. In instances like this, the trailer may require maximum braking power to avoid a jackknife situation.


Large Brake Fluid Reservoir and Self-Priming Pump

The large brake fluid reservoir in this actuator ensures that there'll be enough hydraulic fluid to handle a single-, tandem-, or triple-axle trailer regardless of its size. A self-priming pump reduces the time needed for bleeding the brakes and prevents the brake fluid from emptying back into the reservoir when the actuator is not in use.


Dexter DX Series Actuator Installation

Before installing this actuator, be sure that you have an electric brake controller with an output capacity of at least 5 amps.


You will also need enough 3/16" diameter automotive brake line (sold separately) to connect the unit to your brakes.


Mount the actuator level and upright in a dry area on your trailer. It is recommended that you mount the actuator near the front of your trailer. Do not mount it near the trailer axles or at the rear of the trailer.


The Dexter DX Series actuator splices into your trailer's wiring. Follow the diagram below when connecting the wires. 12-Gauge wire is required, but 10-gauge wire is recommended to ensure the best performance.


Wiring Diagram


K71-651-00 Dexter Axle DX Series ElectroHydraulic Brake Actuator - Disc Brakes - 1,600 psi







Video of Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi


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




Video Transcript for Dexter Axle Brake Actuator - Electric-Hydraulic Brake Actuator - K71-651 Review

Today we're going to take a look at the Dexter electric over hydraulic brake actuator, it has a 1600 psi rating. The electric over hydraulic brake actuator will activate your trailer's hydraulic brakes when you apply the brakes in your tow vehicle. It does require a brake controller to send the signal from the tow vehicle to the actuator, when the brakes are applied. It is compatible with most electronic brake controllers that have the electric over hydraulic brake function. Time based brake controllers are not recommend. The other thing it does require is a 7 way brake connector, that's needed to transmit a signal from the brake controller. The 1600 psi rating is suitable for disc brake applications. As you can see, it has a very large reservoir capacity.

Does use solid state electronics. Does require a 4 wire hookup, and you can see the 4 wires right here. Basically the wire connections are, if you take the yellow wire that connect to the cold side of the brake-away switch, that's the wire that goes hot when a brake occurs. The black wire, that goes to the positive connection on the brake-away switch, that's the wire that charges the brake away battery. The blue wire, that'll go to the output from the in-cab controller, that's the wire that provides power form your brake controller.

The last one is the white one, that's a ground wire. This does require a minimum 9-amp hour brake-away kit. This part will meet or exceed all department of transportation regulations and federal braking requirements. The last thing I want to do is give you some measurements on this. The overall length, pretty much from this end sticking out to this end sticking out is going to be right at about 11 inches. The height on it, from the very bottom to the tallest point, which would be this cap here, probably about 7 inches tall.

The overall width on it, is going to be about 6 inches wide. That should do it for the review on the Dexter electric over hydraulic brake actuator, with the 1600 psi rating.


Customer Reviews

Dexter DX Series Electric Over Hydraulic Brake Actuator for Disc Brakes - 1,600 psi - K71-651

Average Customer Rating:  4.9 out of 5 stars   (17 Customer Reviews)

Electric-hydraulic brake actuator works with your brake controller (sold separately) to activate your trailer's disc brakes. Vented housing releases heat and moisture. Enhanced wiring protection safeguards internal electronics.

- K71-651
by:

these were installed on my Landmark fifth wheel. you have to know what you are doing to install the hydraulic brake actuator and hydraulic lines. But WOW what a difference. I think that my Landmark has more braking power than my pickup truck now. thanks 251011



- K71-651
by:

Item was very easy to install and seems to be working well. I was surprised at how loud the unit is under full activation (e.x. pulling the breakaway switch). Also I found out the hard way that I needed a heavier high temp breakaway switch, as mine started smoking and the wires started to melt when I puled the breakaway during a test. I ordered the Dexter K71-691-00 switch to hopefully resolve the issue. 198524


Comments

Unit works well, Im very pleased with it.

Art - 05/28/2016

18087

- K71-651
by:

I installed this system on my 18,000 lb tri-axle boat trailer. Installation went very well and everything seems to be a great fit. I will not hook the truck to it until spring but I am very anxious to see the improvement over surge brakes. I was able to make a neat clean install and wiring directions were great. 231861



- K71-651
by:

When the OEM steel brake lines wore out on my boat trailer I decided to upgrade the surge brakes to electric over hydraulic (EOH). I replaced the damaged lines and wired up this Demco actuator and now I can stop my trailer on a dime -- should have done this 10 years ago. The actuator works flawlessly with my 2017 GMC's built in controller -- nothing else was needed! Please note though that the GM controller does not apply the brakes when depressing the pedal if the vehicle is not moving (duh). So don't be surprised if you try to test it sitting in your driveway and think that it's not working -- it's designed that way to save wear on the pump if you're not moving. Pressing the manual control does apply the brakes though. (The brakes also apply if you're on an incline). I fabricated a mounting plate out of 3/8 aluminum since the trailer tongue was not wide enough and attached the pump using 4 countersunk 1/4" stainless bolts and then used two 1/2" square u-bolts to affix it to the trailer. If I set the gain on the truck to max, I can actually lock the trailer's wheels, something that surge brakes can't do on their best day! Back in 2010 I upgraded my disc brakes to Kodiak all stainless steel rotors, mounting plates and calipers -- 8 years old and they were still like new -- also well worth the money! 546209



- K71-651
by:

Picture of the hydralic actuator instal led. 97528



- K71-651
by:

Pleased with the pump. It was used as a replacement on an enclosed trailer with electric over hydraulic brakes. Worked well. 633792



- K71-651
by:

This actuator does exactly what it's designed for. The wiring is very heavy duty and the instructions for connections are printed right on top. The cast aluminum end plates make mounting very easy and the self-priming pump made bleeding the whole system about a 3 minute project. The large reservoir holds plenty of spare fluid and the pump modulates the braking performance in perfect sync with the signal coming from the pump. My Prodigy P3 controller has a setting specifically for hydraulic pump control and it works very will with this pump. 619500



- K71-651
by:

Together, I couldn't be happier with my setup. The Dexter K71-651 provides more than enough power to stop my little single axle boat trailer and when the emergency break-away is activated, I can't roll the tires by pulling forward, they lock solid. I love the combination of this unit with the Redarc TowPro Elite, and these two have completely changed the way my trailer handles. If I was starting over, I would buy exactly this setup again. Thank you to ETrailer.com for excellent customer service and quick shipping. I received my unit in 2 days, and my entire order was exactly as purchased. They even emailed me on the day it was delivered to ensure I received it! 617921



- K71-651
by:

I used this model to replace an older version that ended up failing on our trailer. This version seems to be much stronger than the old. I’m not running the truck controller as high as I use to and I am getting the same breaking power. 616722



- K71-651
by:

Used this product to replace a failed ActiBrake sytem. Worked perfectly. Dimensions were almost exact, wiring very simple and thread size was the same. Performance of this product was just as expected. Thank You, etrailer for prompt and precise service and great pricing. 575048



- K71-651
by:

Direct fit exactly what I needed 554452



- K71-651
by:

Great product . Fast delivery. Good pri ce 544083



- K71-651
by:

Installation was easy. Pump works better the original on my airstream trailer.. 492087


Comments

Works better then the original

George - 04/03/2019

51410

- K71-651
by:

Excellent quality. 384380



- K71-651
by:

Excellent 281545



- K71-651
by:

1600 PSI electric over hydraulic brake actuator -- very easy installation. Brake Fluid reservoir holds quite a bit and made bleeding the brakes an easier task. Kudos go to eTrailer.com for their quick delivery of the brake actuator - Juanita T was especially helpful in both the selection and follow-up on the product. Special thanks go to her. 139047



- K71-651
by:

I should have had this on my trailer when it was new in '08. The Carlisle one failed after 3 years proving again that I shouldn't buy from them. 93348


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