Replacement 10" Drum Hydraulic Trailer Brakes for Converting 3,500 lbs Axles to Hydraulic Brakes
Updated 02/07/2026 | Published 02/04/2026
Products Featured in This Question
Question:
I currently have a tandem axle boat trailer with Dexter 3500 lb axles and electric brakes on one axle. I want to convert my electric brakes to hydraulic using your etrailer Hydraulic Trailer Brakes - Uni-Servo - 10 - Left/Right - 3.5K and Demco Hydraulic Brake Actuator - Drum - Zinc - 2 Ball - 7,000 lbs My question is can I use my existing Dexter hubs/drums on these new hydraulic brakes?
asked by: Mike H
Expert Reply:
You sure can Mike. The etrailer Hydraulic Trailer Brakes item # AKUBRK-35 are going to work with your boat trailer's hubs. The only time you run into problems is going from hydraulic brakes to electric because you need a smooth surface for the magnets to grip.
The Demco Hydraulic Brake Actuator item # DM72VR is the correct one for drum brakes. It does not have a manual or electric lockout so you'll need to add one with the Reverse Lockout Solenoid Kit item # DM5836 or use the Free Backing item # AKFBBRK-35 brake assemblies.
If you also need brake lines we have that as well depending on the length you need:
18' - Kodiak Hydraulic Brake Line Kit - Tandem Axle # 18TA-BLKIT
20' - Kodiak Hydraulic Brake Line Kit - Tandem Axle # 20TA-BLKIT
25' - HydraStar Hydraulic Brake Line Kit - Tandem Axle # HS496-252
What kind of boat do you have?
You can add this information, along with any other questions you have, where it says Add Comment.
(click to enlarge)
Product Page this Question was Asked From
etrailer Hydraulic Trailer Brakes - Uni-Servo - 10" - Left/Right - 3.5K
- Trailer Brakes
- Hydraulic Drum Brakes
- Standard Grade
- Manual Adjust
- Single Servo
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- etrailer
more information >
Continue Researching
- Search Results: trailer brakes
- Shop: Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs
- Shop: etrailer Hydraulic Trailer Brakes - Uni-Servo - 10" - Left/Right - 3.5K
- Shop: Kodiak Hydraulic Brake Line Kit - Single Axle - 18'
- Video: All About the Demco Hydraulic Brake Actuator-DM72VR
- Search Results: surge brake actuator brake actuator
- Search Results: trailer hubs and drums
- Shop: Hydraulic Trailer Brake Kit - Uni-Servo - Free Backing - 10" - Left/Right Hand - 3,500 lbs
- Shop: Trailer Wiring
- Search Results: hydraulic hitch
- Shop: Reverse Lockout Solenoid Kit for Demco DA66B and DA70 Hydraulic Brake Actuators - Non-Bypass
- Search Results: 7 pin trailer plug
- Search Results: disc brakes trailer brakes
- Shop: Kodiak Hydraulic Brake Line Kit - Tandem Axle - 20'
- Shop: Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line
- Q&A: Parts Needed to Add Surge Brakes to Trailer with 3,500 lb Axle
- Q&A: Adding Electric Brakes to a Mastertow 80THD Tow Dolly
- Video: Review of the Hydraulic Trailer Brake Kit
- Video: What to Know About the Demco Hydraulic Brake Actuator-DM72VR
- Video: Breaking Down the Hydraulic Trailer Brake Kit
- Q&A: Does Demco Hydraulic Brake Actuator Come With Manual Lockout Option
- Q&A: Replacement for Atwood 61101 Brake Actuator
- Video: Review of TowSmart Custom Fit Vehicle Wiring - Trailer Hitch Wiring - TS37QR
- Q&A: Adding Manual Lockout to Surge Brake Actuator
- Search Results: atwood 61101
- Video: EZ Connector Magnetic 7-Way Trailer Connectors w/ Watertight Seal Feature Review
- Video: An In-Depth Look at the Reverse Lockout Solenoid for Demco Hydraulic Brake Actuators
- Q&A: Wire and Function In A 7-Way Connector To Allow Brakes To Release When Backing Up A Boat Trailer
- Q&A: Brake Hub/Drum Is Stuck And Cannot Be Removed From Spindle - What Can I Do?
- Article: Trailer Wiring Diagrams
Mike H.
2/7/2026
Excellent! thx Jerred I’ll be placing the order shortly. Boat is a Monterey 234FS