Converting From Hydraulic Drum Brakes to Disc Brakes
Updated 05/20/2025 | Published 05/15/2025 >
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Question:
Looking to change my boat trailer from hydraulic surge breaks to disc brakes the GVWR of the trailer is 3520 and the tires are 14x5.5J, do you have any recommendations?
asked by: Mike B
Expert Reply:
Hi Mike; can you send me your axle information? Is it a 3,500 lb axle? If I had to guess it is likely a 3,500 lb axle on there right now. Assuming you have the standard 3,500 lb bearing combination you can use the DeeMaxx Disc Brake Kit # DE66YR. This uses # L68149 inner and # L44649 outer bearings.
You already have the hydraulic lines so the only other thing would be an actuator for disc brakes. Assuming you want a coupler for a 2" ball and have a 3" wide tongue the # DM62VR you looked at will work. If you have a different axle, or if you want an electric over hydraulic setup, let me know in the comments below.

Mike B.
5/19/2025
Not sure if this changes the actuator but this is a EZ load A frame tongue. Currently it is welded on .

Product Page this Question was Asked From
Demco Hydraulic Brake Actuator w/ Electric Lockout - Disc - Zinc - 2" Ball - 7,000 lbs
- Brake Actuator
- Surge Brake Actuator
- Farm Trailer
- Boat Trailer
- Construction Trailer
- Travel Trailer
- Utility Trailer
- Bolt-On
- 7000 lbs GTW
- 2 Inch Ball Coupler
- 3 Inch Channel Tongue
- Disc Brakes
- Electric Lockout
- Demco
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Mike
5/19/2025
I do have the 3500 lb axle. Thank you