Recommended Complete Kit for Electric Over Hydraulic Upgrade to Old Hydraulic Drum Brake Trailer

Question

Question:

I have a 1978 gooseneck,made by Longneck! The break system,has the old type hoses that plugged into connectors,like hydraulic lines on a tractor and has the booster setup,with the resivor in the neck. The truck had a pump,that was driven off of the engine.The truck has been sold long ago. I want to convert it to electric over hydraulic. What parts kit would I need? The trailer has drum type brakes and I want to stay with the drum set up. I would appreciate your help in this matter.

asked by: Clyde H

1

Helpful Expert Reply:

To convert your trailer to the Electric Over Hydraulic system, all you will need is to add the HydraStar Marine Electric Over Hydraulic Actuator w/ Breakaway and 7-Way RV Harness - 1,200 psi # HS381-9066 and then add a compatible electric brake controller to your truck. I recommend the Tekonsha Prodigy P3 # 90195 for that controller because it has an integrated electric over hydraulic function that has proven to work well. There may be a simple wiring adapter for your truck and this controller. If you let me know the year/make/model I'd be happy to assist further.

I've attached an article to assist with this conversion. If you want to run new brake lines, I recommend the HydraStar hydraulic Brake Line Kit # HS496-252 for your tandem axle application.

expert reply by: Jason S

1

Answer 1

To convert a trailer with hydraulic disc brakes to electric-over-hydraulic (EOH) actuator operation you will need to either replace or immobilize the existing surge coupler so it no longer compresses. A bolt installed horizontally through the coupler…

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Answer 2

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 3

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

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Answer 4

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 5

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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Answer 6

There really isn't a particular maximum trailer weight that is used to determine when brakes need to be added to both axles of a tandem axle setup. While I do still recommend checking your local laws, I am also not aware of any general laws that…

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Answer 7

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 8

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 9

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 10

The recommended lug nut torque for your 7,000lb axle depends on a few factors like wheel size, stud size etc. Check out the attached photo which shows the torque specs for a variety of applications. I see you were looking at the Dexter Nev-R-Adjust…

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Answer 11

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 12

If your trailer has 7 wires running all the way back to the brakes, then yes, you can tap into the existing wiring. Each of your new brakes will have two wires for the brake magnet. One wire is for 12 volt power to the brake magnets and the other…

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