Parts Needed to Convert 3,500 lb Trailer Axle to Disc Brakes

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Question:

I am interested in putting disc brakes o my 3500 lb axel. What would I need for this application? Thank you

asked by: Kevin M

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Expert Reply:

To convert your 3,500 lb axle to disc brakes you'd need the part # HBA16-252-82 that includes the actuator, breakaway kit, junction box, and 7-way trailer connector. Then for just the disc brake kits part # K2HR35D and you'd be set. I prefer the Hydrastar actuators as they are more reliable overall and faster reacting.

expert reply by: Jameson C

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Answer 1

The correct way to wire your breakaway battery, like the Hopkins Engager #20400, is to have the black wire from the battery connected to the 12V power on your trailer, and then the blue wire to your breakaway switch which, in turn, connects to the…

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Answer 2

Yes, the Demco Hydraulic Brake Actuator w/ Drop and Electric Lockout #DM8750311 will easily handle 4 brake assemblies like what a tandem axle trailer has.

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Answer 3

Yes, the Titan Premier Disc Brake Kit #T2HRCM10DAC will work as a starting point to upgrade your existing drum brakes to Disc on your 1995 Caulkins Boat Trailer. This Kit is Dacromet-plated to help resist corrosion and includes the hub/rotors,…

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Answer 4

We can get both of your axles set up with disc brakes, and for 3,500 lb axles, since you are converting to disc brakes you'll need a hub-and-rotor disc brake assembly. For the correct kit, as well as the disc brake actuator and brake lines, here…

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Answer 5

You would have no problems what so ever going with an 8000lb rated coupler since you are only at 7800lbs, and going with a 12500lb coupler would cause a little more jerky braking due to the different size springs used for the trailer to apply the…

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Answer 6

I spoke with my contact at Titan about the issue you are having with the Titan Zinc-Plated Brake Actuator w/ Electric Lockout - Disc - 2-5/16 inch Ball - 8,000 lbs, part #T4747220, on your trailer. He informed me that there is no pressure adjustment…

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Answer 7

You can certainly go ahead and re use the existing 2 bolts, provided they are in good condition. The fish wire method shown in the video works too, but it is also very common to just use the two bolts like your old Atwood actuator. Personally I would…

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Answer 8

The bolts that you need to install your Demco Hydraulic Trailer Brake Actuator #DM72VR are 1/2 x 4-1/2 inch Grade 5 bolts and it is recommended to use a steel bushing on the interior of the frame to protect it from any over tightening that can damage…

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Answer 9

Thanks for the picture! It looks like your Toy Hauler has 2-1/4" shackles. To replace and upgrade your wet bolts, I recommend the MORryde Suspension Upgrade Kit for Tandem Axle Trailers item #MR46ZR. These wet bolts have built-in grease fittings…

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Answer 10

It is possible to upgrade the leaf springs on a trailer to a higher rated set but I do not recommend this as it can create a rough ride. The better option would be to install the SumoSprings Trailer Helper Springs part #TSS-107-40 for overslung or…

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Answer 11

You would have to convert to Disc Brakes #KOD87FR to fit a 10" wheel on your 3,500lb axle. This hub uses the common 5 on 4-1/2" bolt pattern. These are Dacromet coated which is almost as good as a galvanized coating but is definitely better…

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Answer 12

Hi Adam; the Dexter DX7.5L A-60 Brake Actuator w Electric Lockout #DX89FR you were looking at is a great option to pair with the #KOD87FR. This fits a 3" wide trailer tongue so you will need to make sure that is what you have. This will also…

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Parts Needed to Convert 3,500 lb Trailer Axle to Disc Brakes

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