How To Convert Vacuum Over Hydraulic Trailer Brakes to Electric Over Hydraulic Trailer Brakes

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

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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.

expert reply by: Conner L

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Answer 1

Since the braking power is still hydraulic, you should have no issues converting from a vacuum over hydraulic system to an electric over hydraulic system. The electric over hydraulic actuator will take the place of the vacuum that pressurized the…

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Answer 2

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 3

Hello BJ, thanks for reaching out. We should have a lift block kit that will work for you, but I will need a bit more info on your trailer. Specifically I will need to know your axle weight capacity. This will help us know which lift kit is correct.…

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Answer 4

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 5

The lift kits we carry fit with specific axles; the #K71-725-02 is a tandem axle application and will give a 3-1/8" lift and is compatible with side-mounted #12 Torflex axles with 5,500-7,000-lb capacities. If that is what your axle is, this kit…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 8

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 9

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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Answer 10

Hey Robert, yes the Kodiak disc brake calipers part #KDBC225DAC that you referenced will replace the Tie Down calipers you have now 46304, they can be used as a left or right hand caliper and does come with ceramic brake pads. If you ever needed…

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Answer 11

First you will need to remove the old hydraulic equipment. Remove the surge coupler or actuator, remove all the lines, and finally remove the brake assemblies. If you have 10 inch diameter hub and drums, you may need to replace those as well. If you…

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Answer 12

Traditionally, trailer manufacturers did not use electric brakes on boat trailers because the brake magnet wiring and trailer wiring did not always have the best insulation or water protection. These days, more and more manufacturers are using…

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How To Convert Vacuum Over Hydraulic Trailer Brakes to Electric Over Hydraulic Trailer Brakes

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