Parts Needed To Add Electric Trailer Brakes To Tandem Axle Utility Trailer With 3,500LB Axles

Question

Question:

Good Afternoon, I was wondering what type of electric brakes would,if possible, work properly for a dual axle standard 16 trailer. The tires on it are ST205/75/15. I have some pics of wheel type but cant find where to attach them. Please let me know if you need any additional info. Thank you in advance.

asked by: Brian J

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Expert Reply:

Based on the images it appears you have 3,500lb axles under your utility trailer. If this is what you have you will need the 2 of the Brake Kits # AKEBRK-35-SA. These are self adjusting brakes which will not require any adjustment once you have them initially set. You will pair these with 4 of the Hub/Drum Assemblies # AKHD-545-35-K which have a 5 on 4-1/2" bolt pattern. You will want to verify this does match your current wheels. These hubs also included standard grease caps similar to what you have. I recommend upgrading to 2 sets of the Bearing Buddy Bearing Protectors # BB1980A-SS which allow you to more easily fill your hubs with grease.

If your trailer was not wired for trailer brakes you will need the 7-Way Wiring Kit # HS381-9000 along with a Breakaway Battery Kit # C52042. I have also linked an article we have below which will help you through the installation process. Please let me know if you find you do not have 3,500lb axles or have a different wheel bolt pattern.

expert reply by: Bud M

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Utility Trailer Tire and Wheel
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Trailer Axle On Utility Trailer
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Tandem Axle Utility Trailer
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Answer 1

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 2

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 3

Hey Jeremy, Typically with boat trailers the manufacturer will install hydraulic surge brakes because you don't have to worry about the water damaging wires like you would with electric brakes. That being said, if you use a heat shrink butt…

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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

Depending on how the trailer was made, there will be a few spots you can check to identify the axle. First, if the trailer was pre-made by a specific company, you may be able to find this information in either the paperwork or on a placard somewhere…

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Answer 6

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 7

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 8

Torque specs for wheel lug nuts will vary depending on the diameter of the lugs, type of lug nut and the wheel's material. The linked chart details the recommended torque for many combinations. Dexter Hub/Drum #84546UC3 has 1/2-inch studs and…

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Answer 9

I currently have three diffrent self-adjusting assemblies for your boat trailer with 10" x 2-1/4" electric drum brakes which are attached for you below. eTrailer Electric Trailer Brake Kit part #AKEBRK-35-SA (3,500 Axles) Dexter…

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