Parts Needed to Convert Outdoors RV 19MKS to Disc Brake

Updated 07/10/2025 | Published 07/07/2025

Products Featured in This Question

Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 5 on 4-1/2 - 3.5K

(2)

$1535.41

Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Rotor - 5 on 4-1/2 - 3.5K

(37)

$1549.38

Question:

Do you have a disc brake conversion for the Dexter B21-5654 axles that are on my outdoors RV 19mks. These are 4000 lb axles.

asked by: Bruce H

Expert Reply:

Hey Bruce, since the Dexter 4,000 lb axles use the same components as 3,500 lb axles what you'd need to convert the axle to disc would be the disc brake kit part # HYD22FR which comes with the needed disc brake components, brake lines, and the best actuator that is the most reliable and quickest reacting. Are you just wanting more powerful brakes?

expert reply by: Jameson C

Bruce H.

7/9/2025

Thank you very much for your reply. basically, I am looking at options to be sure the I have very good brakes. I have never really been a fan of the traditional trailer brake design. You said something that has cought my attention and that is that the Dexter 4,000 lb axles use the same components as 3,500 lb axles. So if the components are the same, what are the differences between the two axles that make one rated for 500LB more than the other??

Jameson C.

7/9/2025

@BruceH It has to do with the distance between the spring seats and the hub face. Aside from that it's the same components.

Bruce H.

7/10/2025

@JamesonC One more question for now. Can the Trailer Brake actuator be mounted on the tongue of the trailer or does it have to be protected from the elements?? thanks Bruce

Jameson C.

7/10/2025

@BruceH Yes it can mount on the tongue of the trailer. That's actually a really common way to mount it. If I could upload a picture I would show you an example of someone who did this as well.