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  1. Trailer Brakes
  2. Hydrastar
  3. Disc Brakes
  4. 6000 lbs Axle
  5. Rotor
  6. Standard Grade
Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 6 on 5-1/2 - 6K
Hydrastar

Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 6 on 5-1/2 - 6K

Part Number: HYD37VR
$1,835.91
Trailer Brakes
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Upgrade to disc brakes with 4 slip-on rotors, stainless steel calipers, and an electric-over-hydraulic actuator that works with your existing brake controller, and get incredible braking performance. Includes hydraulic lines and fittings. Great Prices for the best trailer brakes from Hydrastar. Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 6 on 5-1/2 - 6K part number HYD37VR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Hydrastar Trailer Brakes - HYD37VR

  • Disc Brakes
  • 6000 lbs Axle
  • Rotor
  • Standard Grade
  • Hydrastar
  • 6 on 5-1/2 Inch

Upgrade to disc brakes with 4 slip-on rotors, stainless steel calipers, and an electric-over-hydraulic actuator that works with your existing brake controller, and get incredible braking performance. Includes hydraulic lines and fittings.


Features:

  • Complete kit upgrades your trailer to disc brakes for better performance
    • Consistent stopping even at highway speeds
    • Shorter stopping distance than drum brakes
  • Over-the-hub, dacromet-coated rotors are easy to install
    • Fits over your standard idler hubs and are held in place by your existing wheel bolts
    • No need to replace entire hub-and-rotor assembly if only hub or rotor becomes damaged
  • Stainless steel calipers are rustproof
    • Mounting brackets and hardware included
  • Electric-over-hydraulic brake actuator activates the trailer brakes when you apply the brakes in your tow vehicle
    • Installs on trailer frame and connects to trailer's wiring and includes brake lines
    • Creates smooth, even braking with fast response time
    • Works with most in-cab brake controllers (sold separately)
  • Line kit with brake lines and fittings for tandem-axle trailers


Specs:

  • Axle capacity: 6,000 lbs
  • Bolt pattern: 6 on 5-1/2"
  • Rotor diameter: 12"
  • Warranty:
    • Actuator: 2 years
    • Brakes and components: 1 year


Bearings, Race, and Seal Information:

  • Bearings
    • Inner bearing: 25580
    • Outer bearing: 15123
  • Races
    • Inner race: 25520
    • Outer race: 15245
  • Seal
    • Inner diameter: 2.25"
    • Outer diameter: 3.376"

Complete Kit Includes:

  • Electric-over-hydraulic trailer brake actuator
  • 6K disc brake kit over-the-hub rotors, bearings, and grease seals
  • Stainless steel calipers
  • Hydraulic tandem-axle brake line kit
    • (1) 188" Long brake line with 3/8"-24 inverted flare nuts
    • (1) 70" Long brake line with 3/8"-24 inverted flare nuts
    • (2) 21" Male/male rubber flex lines with 3/8"-24 inverted flare nuts
    • (1) 3/8" Brass T-fitting
    • (1) 3/8" Brass union fitting
    • 1/2" Nylon hose clamps
    • 1/4" Nylon hose clamps
    • Self-tapping screws

Disc Brakes are Better Than Drum Brakes

More and more people are switching their trailers over to disc brakes, and with good reason. Unlike drum brakes, disc brakes deliver consistent braking, even at highway speeds. Disc brakes also offer a substantially shorter stopping distance. Disc brake calipers have only one moving part, so there are fewer parts to maintain, fewer parts to get damaged, and fewer parts to have to repair or replace.


Over-the-Hub Rotors for Easy Replacement

Slip-on, cast iron rotor makes it easy to convert an idler axle to a disc brake axle. Simply place the rotor over your hub and use your existing wheel bolts to hold it in place. With a separate rotor and hub, you can easily repair or replace one element of your brake system without having to junk the whole thing.


The rotor is made from cast iron, matching SAE specifications. Cast iron is ideal for high-temperature operations and offers a favorable friction coefficient to ensure adequate stopping power. Rotors are vented to effectively dissipate heat, dramatically reducing the incidence of heat-related damage.



E6K-T1SOSSC Hydra Star Disc Brake Kit with Electric-Over-Hydraulic Actuator for Double Axle Trailers - Stainless Steel Calipers - 12" Diameter Slip On Rotor - 6,000-lb Rating





Video of Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 6 on 5-1/2 - 6K

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Hydrastar Trailer Brakes - Tandem Axle Disc Brake Kit with Actuator - HYD37VR

Hello everybody, this is Jeff at etrailer.com. Today I'm gonna take a look at this Hydrastar slip-on rotor disc brake kit with the electric over hydraulic brake actuator. This is for tandem 6,000 pound trailer axles with the six on five and a half inch bolt pattern. Now this kit is an all-inclusive kit. This will have everything you need to switch your trailer over to disc brakes for improved performance and greater stopping power. The over the hub rotor's very easy to install.

All you do is slide these over your standard idler hubs and they're held in place by your existing wheel lug nuts. So there's no need to replace your entire hub and rotor assembly if only the hub or the rotor becomes damaged. This kit will include everything shown here on the table. It's four disc brake end kits for two axles. We mentioned the slip-on Dacromet coated cast iron rotors.

They also include the inner and outer bearings, the grease seals. Now the brake calipers that are included are stainless steel. They do include brake pads in the installation bolts. And if you notice, we have 'em bolted to the Dacromet coated caliper mounting brackets, which you can see are designed to fit five volt brake flanges. Now the Dacromet coating on the rotors and the caliper mounting brackets is corrosion resistant.

The stainless steel calipers we mentioned are rust proof. Now I wanted to zoom in on this electric over hydraulic actuator. It's a Hydrastar brand. This is the hard wire into your tow vehicle and it signals your in-cap brake controller and brakes are applied, triggering the pump in the motor on the actuator. This will create smooth even braking with a fast response time and it is designed to work with most in-cap brake controllers.

Now the brake line kit, you can see I have laid out here. The brake line kit will include all the solid brake lines over here, the flexible brake lines, all the fittings you need for installation on a tandem axle trailer. Now we do list on the product page of this part number all of the part numbers that are included with this kit. Now more and more people are switching their trailers over to disc brakes and with good reason. 'Cause unlike drum brakes these disc brakes will deliver consistent braking even at highway speeds and disc brakes do also offer a substantially shorter stopping distance. The disc brake calipers we mentioned right here, they only have one moving part, so that's fewer parts to maintain, fewer parts to get damage and of course fewer parts to have to repair or replace. Specs again. This application is for tandem axle trailers with 6,000 pound axles. Bolt pattern, again, six on five and a half inches, and the diameter on the rotors is 12 inches. But that should do it for a look at the Hydrastar slip on rotor disc brake kit with the electric over hydraulic brake actuator for tandem 6,000 pound trailer axels.

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See what our Experts say about this Hydrastar Trailer Brakes

  • Converting A 2021 East To West Tandara 5th Wheel Trailer To Electric-Over-Hydraulic Disc Brakes
    Hey George, This kit is actually pretty new for us so we haven't had a chance to get photos on the site yet, but is sitting down in our photo department waiting for its turn so they should be up soon. The rotors are slip on for a 5 on 4-1/2" idler hub and only have vents on the outer ring of the rotor and does not have any for the inner hub potion. The brake pads included in the Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers # HYD37VR are Hydrastar's 225 Caliper brake...
    view full answer...
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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Jeremy F
Written by:
Jeremy F

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