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This Hydrastar actuator brings the quick response of an electric brake controller to hydraulic drum brakes. With a maximum output pressure of 1,000 psi and 12V DC power, it applies your trailer brakes the instant you touch the pedal instead of waiting for surge pressure at the hitch. The electronic, proportional valve keeps braking smooth and even, matching the effort of your controller so there’s no lag or push from behind.
Because this system is electric over hydraulic, you can back up without fighting your brakes. There’s no coupler to pin or lock out—just back down the ramp or up a driveway and keep full control. You can even use the manual override on your brake controller to activate trailer braking whenever you need it, which makes tight spaces and steep grades easier to handle.
The actuator housing is extruded anodized aluminum that resists corrosion from water and road grime. A vented end plate releases heat, pressure, and moisture to protect the internal parts, so it can be mounted in enclosed spots where other actuators might overheat. Inside, weathertight seals keep everything clean for long-term reliability on single- or tandem-axle trailers up to 7,000 lbs with drum brakes.
It mounts directly to your trailer frame using the supplied hardware and connects to your existing 3/16" hydraulic line port. The wiring is simple—black for 12-volt power, blue for the brake controller signal, yellow for the breakaway circuit, and white for ground. Pair it with a standard 5-amp-hour breakaway battery kit (sold separately), and you’re ready for dependable braking performance wherever you tow.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
James
4/12/2019
I am happy with the actuator and how well it is working
John B.
10/23/2013
Have Hydrastar HBA12 1200psiG7 on tandem boat trailer. Breakaway activates brakes well but brakes activated thru vehicle do not work.A check of power from vehicle to trailer indicates circuits are all good. Can hear contact noise from inside brake unit but pump doesnt start but thru breakaway activation the pump works well.Have been told the fault is in the Electronic Chip that activates the pump. Is this correct and if so can I purchase that part only? What part number do I order? Appreciate your reply. John B
Patrick B.
10/29/2013
Do you have a question about this Brake Actuator?
Info for this part was:
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Katrina B.
5/11/2023
It seems that the manufacturer prefers to handle all warranties. Lets get you their information via email.