How To Convert Vacuum Over Hydraulic Trailer Brakes to Electric Over Hydraulic Trailer Brakes
Updated 03/05/2019 | Published 03/02/2019 >
Products Featured in This Question
Question:
Hello there. I am currently running a vacuum over hydraulic brake setup on a 1977 F350 and gooseneck. I have just updated to a 2015 Dual Cab Iveco Daily which has an electric brake system already installed by the previous owner. On the gooseneck/ trailer side of things do I need to change the axles or can I just install new hubs and electrics. I have been told by a local supplier in Australia that I have to change axles, hubs, the lot. Hope that is explained okay. Trying to work out which way to go for the best setup. Many thanks Lesley PS. Thank you for your great information on a previous email regarding going the other way and keeping my vacuum over hydraulic system.
asked by: Lesley
Expert Reply:
In order to convert the vacuum over hydraulic setup on your trailer to electric over hydraulic you will need an electric over hydraulic actuator, breakaway kit, and trailer wiring. The hubs you have now if operated by hydraulic pressure should not need to replaced as well unless they are too badly worn or there is something with a vacuum over hydraulic setup that I am not aware of which is possible as we do not deal with these types of brakes very often if at all. If you do end up needing to replace your hubs then please provide me with bearing numbers/measurements as well as your bolt pattern.
For an electric over hydraulic actuator, breakaway kit, and trailer wiring we have an excellent option for you in the HydraStar Marine Electric Over Hydraulic Actuator part # HS381-9067 for disc or part # HS381-9066 for drum which actually comes with all three of the above components. The only other thing you will need is a brake controller compatible with electric over hydraulic brakes for which I recommend using the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885. The Prodigy P2 also has integrated safeguards and comes with a lifetime warranty.

Product Page this Question was Asked From
Hydrastar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,600 psi
- Brake Actuator
- Electric-Hydraulic Brake Actuator
- Boat Trailer
- Travel Trailer
- Disc Brakes
- Hydrastar
more information >
Continue Researching
- Shop: Torflex Lift Kit - Tandem Axle - 2-5/8" Lift
- Shop: Hydrastar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,200 psi
- Shop: Correct Track Trailer Alignment and Lift Kit - Triple Axle
- Shop: Brake Controller
- Q&A: Availability of HydraStar Disc Brake Kit for Drum Brakes
- Shop: Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional
- Shop: Trailer Wiring
- Shop: B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs
- Shop: Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness w/ 7-Pole and 4-Pole Connector
- Shop: Torflex Lift Kit - Single Axle - 2-7/8" Lift
- Search Results: demco gooseneck coupler
- Video: Complete Breakdown of the Torflex Lift Kit
- Q&A: Can Vacuum Over Hydraulic Brakes be Converted to Electric Over Hydraulic Brakes
- Q&A: How To Install The Plug-And-Play Hydrastar Vented Marine Electric Over Hydraulic Actuator
- Q&A: Will the DeeMaxx Alpha G1600 Electric Over Hydraulic Actuator with 2017-22 GM Brake Controller?
- Q&A: Differences Between the HydraStar Hydraulic Actuators for Disc Brakes
- Article: How to Tell the Weight Rating of a Trailer Axle
- Q&A: Can I Run Two Of The Dexter Self-Contained Hydraulic Jacks From The Same Remote?
- Article: Adding Electric Over Hydraulic Disc Brakes
- Q&A: Parts Needed to Do a Disc Brake Conversion on a 2024 Brinkley Model Z 5th Wheel Trailer
- Article: Trailer Wiring Diagrams
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: Best Boat Trailer Jacks
- Article: How to Bleed Your Trailer Surge Brakes
- Article: How to Measure a Trailer Axle