Adding Electric Brakes to a Utility Trailer with a 3,500 Lb Rockwell Axle

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Question:

We do have everything you will need to add electric brakes to your utility trailer but in order to recommend the correct parts I would need a bit of information from you. 1) Do you have a brake mounting flange on your trailer axle and if so how many bolts hole are attached? 2) What size are your trailer wheels? 3) What is the bolt pattern on your trailer wheels/hubs? 4) What are the inner and outer bearing seat diameters on your spindle or what are the numbers on your bearing? Once provided with the above information I would be glad to recommend the correct parts for you. To get a better idea of what is required, take a look at the articles I have attached for you.

asked by: David D

1

Helpful Expert Reply:

We do have everything you will need to add electric brakes to your utility trailer but in order to recommend the correct parts I would need a bit of information from you.

1) Do you have a brake mounting flange on your trailer axle and if so how many bolts hole are attached?

2) What size are your trailer wheels?

3) What is the bolt pattern on your trailer wheels/hubs?

4) What are the inner and outer bearing seat diameters on your spindle or what are the numbers on your bearing?

Once provided with the above information I would be glad to recommend the correct parts for you. To get a better idea of what is required, take a look at the articles I have attached for you.

expert reply by: Conner L

1

David

12/10/2017

We do have everything you will need to add electric brakes to your utility trailer but in order to recommend the correct parts I would need a bit of information from you. 1) Do you have a brake mounting flange on your trailer axle and if so how many bolts hole are attached? 2) What size are your trailer wheels? 3) What is the bolt pattern on your trailer wheels/hubs? 4) What are the inner and outer bearing seat diameters on your spindle or what are the numbers on your bearing? Once provided with the above information I would be glad to recommend the correct parts for you. To get a better idea of what is required, take a look at the articles I have attached for you.

Conner L.

12/10/2017

For a braking assembly that will fit the 4-bolt brake mounting flange on your trailers axle and will work with the 15" wheels you have, I recommend taking a look at the Electric Trailer Brake Kit part # AKEBRK-35-SA. This electric braking assembly has self-adjusting shoes which offers optimum performance without having to take the time to make continuous adjustments. Since you will be adding a new braking assembly, you will also need new hubs/rotors. For this I recommend the Trailer Hub and Drum Assembly part # AKHD-545-35-K. This hub/drum combo has a 5 on 4-1/2" bolt pattern and uses an L68149 (1.378" inner diameter) inner bearing and a L44649 (1.063" inner diameter) outer bearing. You will need to confirm both the bolt pattern and bearing numbers on your existing hubs/bearings in order to determine if this assembly will work for you. I have attached two articles to help you with each process. To complete your electric braking setup you will also need trailer wiring, breakaway kit, and a brake controller if you do not already have one. For a trailer wiring kit the Epicord 7-Way Molded Trailer Plug with Junction Box part # 277-000141 and the Deka Wire - Jacketed 7-Wire part # DW04914-1 (per foot) would work well for you. For a breakaway kit, the Hopkins Engager Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger part # 20099 is very popular among users and the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885 is one of our best selling brake controllers. I have also attached several review and installation videos on the above products for you as well.

Answer 1

First off, thank you for all of the information. We don't always get that much info so I wanted to say I appreciate it. Secondly, the trailer brake kit for your axle is part #AKEBRK-35-SA which is self-adjusting, and then the hub/drum kit is…

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Answer 2

The correct replacement axle for a Quality 3500 Lb 95 HF 80 SC is the Dexter Trailer Axle Beam with E-Z Lube Spindles part #7359765. This option will be a direct replacement with no modifications needed. If you want to replace the brakes and…

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Answer 3

Hey Doug, thanks for the information. I searched that part number and wasn't able to find any information on it. The etrailer Electric Trailer Brakes item #AKEBRK-35-SA do fit a 10" diameter x 2-1/4" wide drum and have a 3,500 lbs…

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Answer 4

I currently have four different self-adjusting assemblies for your boat trailer with 10" x 2-1/4" electric drum brakes. You can choose from the following: -Terran Axle Electric Trailer Brakes #TX97ZJ (3,500 Axles) -etrailer Electric Trailer…

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Answer 5

When measuring the brake drum, you measure the interior diameter on the drum. I have attached a photo to help during the measuring process. If your brakes are 7 inches part #AKEBRK-2 works for your application. You also need hardware part #BRKH7 If…

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Answer 6

The inside diameter and the depth of the brake drum is what determines the necessary width of the brake pads. For example, the 10 inch x 2-1/4 inch Electric Brake Shoe, part number BP04-090 that you refer to would fit a brake drum with a 10 inch…

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Answer 7

I recommend the etrailer.com Hub and Drum Assembly #AKHD-545-35-K as this is a correct fit for your 3,500 lb Hayes axle. For the 10 x 2-1/4 inch drum on your Hayes/AL-KO axle, I recommend the Hayes 10 Inch Electric trailer Brake Assembly #60202703…

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Answer 8

I would be happy to help! Since your Reliable axle has a 3500lb rating you will need to go with the Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right Hand Assemblies - 3,500 lbs #AKEBRK-35-SA, hub and drum assemblies…

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Answer 9

The axle you'll want is the Dexter Trailer Axle Beam with E-Z Lube Spindles #7359765 which matches the dimensions you listed of 95 inches from hub face to hub face and then 80 inches between spring seats. The U-bolt kit you need is the part…

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Answer 10

Hey Robert! Ideally you're going to get 12V all the way back to the brakes but that typically doesn't happen. What exactly is the issue? Are they not working at all? At 8-9V I would expect them to have most of their functionality to a point…

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Answer 11

When determining if you need 10 inch or 12 inch brake assemblies there are a couple of easy things to check to confirm the fit for your trailer. The first thing is you can measure the diameter of your hub. The second thing is you can look at the…

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Answer 12

Hello Mike. It sounds like you are wanting to add electric brakes to your boat trailer that currently has no brakes. This is possible, but you will first need to make sure that your axle is equipped with a brake flange at the base of the spindle. The…

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Adding Electric Brakes to a Utility Trailer with a 3,500 Lb Rockwell Axle

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