Conversion of Air Over Hydraulic to Electric Over Hydraulic Brakes
Updated 12/15/2014 | Published 12/14/2014
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Question:
How does the actuator connect to the trailer master cylinder reservoir? Right now the trailer air tank lines go directly to the master cylinder. I just purchased two gooseneck trailers currently equipped with air over hydraulic. I have a 1-ton Ram diesel with integrated electric brake controller. And what items do i need to make the conversion?
asked by: Larry C
Expert Reply:
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 a digital display, 3 boost levels, battery protection and continuous diagnostics.
The Dexter Electric/Hydraulic Brake Actuator for drum brakes I recommend is the Dexter # K71-650. It's 1,000 psi for drum brake applications. You will need a breakaway kit like # 34-285 in the event you don't have one.
For disc brakes, I recommend the Dexter # K71-651. It's 1,600 psi suitable for disc brake applications. Breakaway kit is also # 34-285.
Another option to consider, and is less costly, is switching to electric brakes and keep your integrated brake controller. To switch your hub and drum assemblies I would need to know the bolt pattern of the trailer wheel, brake mounting flange mounting pattern, wheel size, and inner and outer bearing numbers.
The numbers stamped into your trailer's existing bearings and seals will help you determine the proper hub-and-drum assemblies. You will also need to know the wheel bolt pattern of your existing hubs so that the new hubs will match up with your existing wheels. If you cannot find part numbers for the bearings and seals, you can measure the spindles at the inner (C in diagram) and outer (D in diagram) bearing surfaces as well as the seal contact surfaces (B in diagram). See diagram to the right.
The pattern of the holes in the brake flange is standard, so all you need to note is the number of holes in the mounting flange, and the axle diameter.
I have included a few FAQ's and video review for you as well.
Product Page this Question was Asked From
Dexter DX Series Electric Over Hydraulic Brake Actuator for Drum Brakes - 1,000 psi
- Brake Actuator
- Electric-Hydraulic Brake Actuator
- Boat Trailer
- Travel Trailer
- Drum Brakes
- Dexter
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