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Dexter DX Series Electric Over Hydraulic Brake Actuator for Drum Brakes - 1,000 psi

Dexter DX Series Electric Over Hydraulic Brake Actuator for Drum Brakes - 1,000 psi

Item # K71-650

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Dexter Electric Over Hydraulic Brake Actuator 1000 psi
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  • Electric-Hydraulic Brake Actuator
  • Drum Brakes
  • Dexter Axle
  • 1000 psi
Electric-hydraulic brake actuator works with your brake controller (sold separately) to activate your trailer's drum 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 K71-650 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 Drum Brakes - 1,000 psi. Brake Actuator reviews from real customers.


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  • Reviews (1)
  • Q & A (63)
  • Videos (1)
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Dexter Axle Brake Actuator - K71-650

Electric-hydraulic brake actuator works with your brake controller (sold separately) to activate your trailer's drum 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 drum brakes
  • Maximum output pressure: 1,000 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 1,000 psi of pressure output to provide strong stopping power for your drum 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


K71-650-00 Dexter Axle DX Series ElectroHydraulic Brake Actuator - Drum Brakes - 1,000 psi






Video of Dexter DX Series Electric Over Hydraulic Brake Actuator for Drum Brakes - 1,000 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 - K71-650 Review

Today we're going to take a look at the Dexter electric over hydraulic brake actuator. Has a 1,000 psi capacity. This 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 breaks are applied. This is compatible with most electronic brake controllers that have the electric over hydraulic brake function, and time-based brake controllers are not recommended. The other thing this does require is a seven-way brake connector, that's needed to transmit a signal from the brake controller.

The 1,000 psi rating is suitable for drum brake applications, and as you can see it has a very large reservoir capacity. Does use solid state electronics. It does require a four-wire hookup, as you can see the four wires right here. Basically the yellow wire, if you take this yellow wire that'll connect to the cold side of the breakaway switch. That's the wire that goes hot when a break occurs. A black wire right here, that'll go to the positive connection on the breakaway switch, and that's the wire that charges the breakaway battery.

The blue wire right here, that'll go to the output form the end cap controller. That's the wire that provides power from your brake controller. Then the last one is the white one, which is a ground wire. This actuator does require a minimum 9 amp-hour breakaway kit. This part will meet or exceed all Department of Transportation regulations and federal braking requirements. Comes with a nice operations manual. The last thing I want to show you is some dimensions on it.

The overall width, we're going to measure furthest edge to furthest edge, and it's going to be right at about 11 inches long. The width on it, we turn it this way, at the widest point it's going to be right at about six inches, and the height on this, at the highest point, from the bottom up to the very top right here, it's going to be right at 7 inches tall. That should do it for the review on the Dexter electric over hydraulic brake actuator with the 1,000 psi capacity.


Customer Reviews

Dexter DX Series Electric Over Hydraulic Brake Actuator for Drum Brakes - 1,000 psi - K71-650

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

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

- K71-650
by:

This 1000 PSI actuator works great on my tadnem trailer. Also the OEM controller in the 2016 Ram 5500 works very smoothly on the braking of this unit. No Problems 572388


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  • Converting Military Trailer Air Over Hydraulic Drum Brakes to Electric Over Hydraulic
  • You are correct, there are 4 electric over hydraulic braking systems, from 3 manufacturers, that can be used to eliminate the air over hydraulic actuator on your M200A1 trailer. These systems all require a breakaway system to meet DOT safety standards. I will detail each system for you so you can select the one that will work best for your truck and trailer setup. First, the Dexter Electric Over Hydraulic Brake Actuator, # K71-650, would be a good choice because it will work with the...
    view full answer...

  • How to Wire the Dexter Electric Over Hydraulic Brake Actuator # K71-650
  • Yes, the Dexter Electric Over Hydraulic Brake Actuator, item # K71-650, is designed to work with most electronic brake controllers including your factory installed controller, if it is compatible with electric over hydraulic brakes. You will need to check with Ford to determine whether your OEM controller is compatible with electric over hydraulic braking systems. Wiring connections for the Electric Over Hydraulic Brake Actuator are as follows. Yellow - Cold side of breakaway switch,...
    view full answer...

  • How To Install and Operate Dexter Electric Over Hydraulic Brake Actuator
  • To install the Dexter Electric Over Hydraulic Brake Actuator, part # K71-650, you would need to install a brake controller that is compatible with a electric over hydraulic brakes and then part # K71-650. To install part # K71-650, you must use at least a 9 amp/hour breakaway kit, like Dexter Breakaway Kit, part # 34-285. To hookup part # K71-650, you will connect the Yellow wire to cold side of breakaway switch, which is the wire that is hot when breakaway occurs. The Black Wire connects...
    view full answer...

  • How to Wire the Dexter Electric Over Hydraulic Trailer Brake Actuator
  • Wiring connections for the Electric Over Hydraulic Brake Actuator are as follows. Yellow - Cold side of breakaway switch, The wire that goes hot when a breakaway occurs. Black - Positive connection on breakaway switch, The wire that charges the breakaway battery. Blue - Output from in cab controller, The wire that provides power from your brake controller. White - Ground The white ground wire will attach to the negative battery terminal on the trailer break away battery. The 12...
    view full answer...

  • Brake Lines and Fittings for electric Over Hydraulic Brakes on a 40 Foot Tandem Axle Trailer
  • Basically you will run the lines back and T-off where needed. A kit like # 9579-2 would work though you may need to add additional brake line (available and auto parts stores) to complete the installation. I have included a picture that shows a basic set up. A system with 1,000 psi is fine for drum brake applications. Since some pressure is always present in the wheel cylinders in drum brakes, larger psi capacities are not needed. I have included a link to the drum brake electric over...
    view full answer...

  • How To Use an Electric Brake Controller With Hydraulic Brakes On Tandem Axle Boat Trailer
  • Your boat trailer has hydraulic surge brakes that uses a surge coupler to activate the trailer brakes. An electric brake controller will activate the brakes by using an electric current, so you will have to either replace the hydraulic brakes on your trailer with electric brakes or use an electric over hydraulic brake actuator like the Dexter Electric Over Hydraulic Brake Actuator, part # K71-650. To use the Dexter actuator you will need to make sure your brake controller can be...
    view full answer...

  • Conversion of Air Over Hydraulic to Electric Over Hydraulic Brakes
  • Thanks for including a picture! Actually, the electric over hydraulic actuators have their own reservoir as the brake line connects directly to the unit. The integrated brake controller you have isn't compatible with electric over hydraulic because it won't activate the actuator properly. If you provide me the year of your Ram, I will be more than happy to recommend a brake controller. However, one of our most popular brake controllers is the Tekonsha Prodigy P2 # 90885. It includes...
    view full answer...

  • Are Electric Over Hydraulic Trailer Brake Actuators Compatible with Factory Brake Controllers
  • It all depends on which electric over hydraulic actuator you are using. If your truck has an integrated brake controller it might be compatible. But you mentioned having a 2009 2500HD but I do not know if it is a Silverado, Sierra, or Ram. If we are talking factory integrated controllers then GM trucks are not compatible with the HydraStar # HBA16, # HBA-12, or # HBA-10 unless you use adapter # HBA-CAM (which only works with the model HydraStars indicated on its product page). It...
    view full answer...

  • Troubleshooting Dexter Electric Over Hydraulic Trailer Brake Actuator Cycles On and Off
  • First thing you will need to do is check that all of the wiring of the actuator and your brake controller are correct. I attached a couple diagrams that should be helpful I spoke with my contact at Dexter and there is a way to troubleshoot your actuator. If you use a 12 volt battery and connect just the white wire from the actuator to the negative post and then connect the black wire to the positive side of the battery, you could possibly hear a click sound but the actuator should not...
    view full answer...

  • Parts Needed to Add Electric Over Hydraulic Brakes to a Trailer with Vacuum Over Hydraulic Brakes
  • We actually have an FAQ article on everything you will need to add electric over hydraulic trailer brakes to a trailer. I have included a link to it for you. You already have a the brakes and brake mounting flange, so you will just need a new brake line kit, electric over hydraulic actuator, and a compatible brake controller. None of the actuators work with all factory integrated brake controllers so you will need to use an adapter. I recommend the Carlisle Hydrastar, # HBA16. It is...
    view full answer...

  • Building A Gooseneck Trailer Which Braking System is Recommended Electric/Electric Over Hydraulic
  • When installing the braking system you will want to make sure that the parts are compatible with the weight capacity of the axles, brake mounting flange, and spindles that you will be using to build your trailer. To add brakes to the gooseneck trailer that you will be building you will need a brake controller installed in the vehicle that you will be towing the trailer with. The brake controller sends signal to the trailer that the vehicle is braking, brake controllers require a wiring...
    view full answer...

  • Wiring the Breakaway Switch to Dexter Electric Over Hydraulic Drum Trailer Brake Actuator
  • The orange/black wire does connect to the positive battery terminal on the breakaway battery from kit # 34-285. The blue wire connects to the yellow wire on the actuator, # K71-650. I have included a picture showing how everything gets wired up.
    view full answer...


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Info for this part was:

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Installed by:
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