Electric over Hydraulic Disc Brake Conversion for 7,000 lb Nev-R-Lube Axles
Question:
I have a 2010 Jayco Designer 35RLTS with the 7,000# Dexter Nev-r-lube axles. I saw the reply already posted to this product, but I read that the weld-on-brackets are sold separately. My drum brakes are held on using five studs, so I would think that the disc brackets would bolt on, but I do not want to waste any time not ordering the correct parts. I also want to make sure that there have not been any changes to the axles over the years when the model name and rating have stayed the same. Thank you so much!
asked by: CORY W
Expert Reply:
For your 2010 Jayco Designer with 7,000 lbs Nev-R-Lube axles we have several disc brake options that will fit. The weld on flange bracket that you mentioned is only necessary if there is not a flange on the axle, since your's has a 5 bolt design, it's already installed.
There are 3 potential sizes of lug studs that mount the wheel and tire, 1/2", 9/16" and 5/8", so you want to check the size so you can use your current wheels and lug nuts. All of the kits will give you a 8 on 6 1/2" bolt pattern and work with wheel sizes 16" - 17"
If you have 1/2" studs I recommend Dexter Disc Brake Kit part # K71-694-695-10.
If you have 9/16" studs use part # K71-694-695-12.
If you have 5/8" studs use part # K71-694-695-14
Each one of the kits will have all the hardware, bearings races and seals in the kit to install on 1 axle, so since your Jayco is a tandem axle you will need 2 kits. The numbers, and measurements are as follows, :
The Inner bearing: # 25580 (1.75" inner diameter),
The outer bearing: # 14125A (1.25" inner diameter),
Inner race: # 25520,
Outer race: # 14276,
Grease seal: # GS-2250DL Inner diameter: 2.25", Outer diameter: 3.376".
Disc brakes do require more pressure from the actuator to apply the brakes, the kits require 1600 psi from the actuator to operate properly, so you will want to check and verify the psi rating of your actuator, as well as the condition of the lines.
If you need an actuator I recommend the HydraStar Vented Marine Electric Over Hydraulic Actuator for Disc Brakes part # HS381-8067. It will provide the 1600 psi you need to operate the brakes, and work with a variety of brake controllers. But the actuator will require a brake controller that is compatible with electric over hydraulic brakes, so you want to see if your brake controller is compatible.
If you need a new brake controller I recommend the Tekonsha Prodigy P2 Trailer Brake Controller part # 90885. The P2 is one of my favorite brake controllers, because it gives you a smooth proportional braking action, and is very intuitive to use and set up. It works with 1 to 4 axles, so it would be perfect for your Jayco Designer.
If you need to run new brake lines I recommend # HS496-252, the HydraStar Hydraulic Brake Line Kit for Tandem Axle trailers. It has 25' of main line, and since your Jayco is about 37' long, you'll have more than enough line to reach all the brakes.
I linked videos for you to reference.

Products Referenced in This Question
Replacement Trailer Hub Bearing - 14125A
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.250 Inch I.D.
- Bearing 14125A
- Race 14276
- 5200 lbs Axle
- 6000 lbs Axle
- 7000 lbs Axle
- TruRyde
more information >
Replacement Race for 14125A Bearing
- Trailer Bearings Races Seals Caps
- Races
- Standard Races
- 2.717 Inch O.D.
- Bearing 14125A
- Race 14276
- 5200 lbs Axle
- 6000 lbs Axle
- 7000 lbs Axle
- etrailer
more information >
Replacement Race for 25580 Bearing
- Trailer Bearings Races Seals Caps
- Races
- Standard Races
- 3.265 Inch O.D.
- Bearing 25580
- Race 25520
- 6000 lbs Axle
- 7000 lbs Axle
- 8000 lbs Axle
- etrailer
more information >
Replacement Trailer Hub Bearing - 25580
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.750 Inch I.D.
- Bearing 25580
- Race 25520
- 10000 lbs Axle
- 6000 lbs Axle
- 7000 lbs Axle
- 8000 lbs Axle
- 9000 lbs Axle
- etrailer
more information >
Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LED Display
- Up to 360 Degrees
- Tekonsha
more information >
Grease Seal - Double Lip - 2.250" ID - 3.376" OD - GS-2250DL
- Trailer Bearings Races Seals Caps
- Seals
- Grease Seals - Double Lip
- 2.250 Inch I.D.
- 3.376 Inch O.D.
- TruRyde
more information >
Hydrastar Marine Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi
- Brake Actuator
- Electric-Hydraulic Brake Actuator
- Marine
- Travel Trailer
- Disc Brakes
- Hydrastar
more information >
Hydrastar Hydraulic Brake Line Kit - Tandem Axle - 25' Long, 3/16" Main Line
- Accessories and Parts
- Brake Actuator
- Trailer Brakes
- Disc Brakes
- Hydraulic Drum Brakes
- 25 Feet Long
- Brake Lines
- Steel Line and Flexible Hose
- Brake Line Kits
- Tandem Axle
- Hydrastar
more information >
Dexter Disc Brake Kit - 12-1/4" Hub/Rotor - Grease - 8 on 6-1/2 - E-Coat - 7,000 lbs
- Trailer Brakes
- Disc Brakes
- Standard Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 1/2 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- Dexter
more information >
Dexter Disc Brake Kit - 12-1/4" Hub/Rotor - Grease - 8 on 6-1/2 - E-Coat - 7,000 lbs
- Trailer Brakes
- Disc Brakes
- Standard Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 9/16 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- Dexter
more information >
Dexter Disc Brake Kit - 12-1/4" Hub/Rotor - Grease - 8 on 6-1/2 - E-Coat - 7,000 lbs
- Trailer Brakes
- Disc Brakes
- Standard Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 5/8 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- Dexter
more information >
Product Page this Question was Asked From
Dexter Disc Brake Kit - 12-1/4" Hub/Rotor - Grease - 8 on 6-1/2 - E-Coat - 7,000 lbs
- Trailer Brakes
- Disc Brakes
- Standard Grade
- 8 on 6-1/2 Inch
- Hub and Rotor
- 9/16 Inch Studs
- 7000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- Dexter
more information >
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