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  1. Trailer Brakes
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  4. 6000 lbs Axle
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  6. Standard Grade
Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 12" Rotor - 6 on 5-1/2 - 6K
Hydrastar

Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 12" Rotor - 6 on 5-1/2 - 6K

Part Number: HYD74VR
$1,894.63
Trailer Brakes
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Get 4 rust-resistant hub-rotor assemblies - complete with stainless steel calipers and inner (25580) and outer (15123) bearings - and an electric-over-hydraulic actuator that works with your existing brake controller. Includes lines and fittings. Great Prices for the best trailer brakes from Hydrastar. Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 12" Rotor - 6 on 5-1/2 - 6K part number HYD74VR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (14)
  • Q & A (0)
  • Videos (1)
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Hydrastar Trailer Brakes - HYD74VR

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

Get 4 rust-resistant hub-rotor assemblies - complete with stainless steel calipers and inner (25580) and outer (15123) bearings - and an electric-over-hydraulic actuator that works with your existing brake controller. Includes 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
  • Stainless steel calipers are rustproof
    • Mounting brackets and hardware included
  • 4 Dacromet-coated disc brake end kits
    • Hub-rotor assemblies include bearings, races, seals, and grease caps
  • 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"
  • 2-Year limited warranty


Bearings, Race, and Seal Information:

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

Complete Kit Includes:

  • Electric-over-hydraulic trailer brake actuator
  • 6K disc brake kit with hub-and-rotor assemblies, 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.



E6K-T1SSC Hydra Star Disc Brake Kit with Electric-Over-Hydraulic Actuator for Double Axle Trailers - Stainless Steel Calipers - 12" Diameter Rotor - 6,000-lb Rating

Installation Details HYD74VR Installation instructions



Video of Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 12" 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 - HYD74VR

Hello, everybody. This is Jeff at etrailer.com. Today we're gonna take a look at this Hydrastar Disc Brake Kit with the Electric Over Hydraulic Brake Actuator for Tandem 6,000 pound Trailer Axles. It has a six on five and a half inch bolt pattern. Now this is an all inclusive kit. This will have everything you'll need to switch your trailer over to disc brakes for improved performance and greater stopping power.

This will include four disc brake end kits for two axles. The hub and rotor assemblies right here have the half inch wheel studs on them. And they do include pre-installed bearing races on the inside. It does also come with the inner and outer bearings. The grease seals.

Now the calipers that are included, these are stainless steel calipers. They will include the brake pads and the installation bolts. The mounting brackets that the caliper's attached to, these are designed to attach to a five bolt brake flange. And the Dacromet coating, which is on the rotors and on the caliper mounting brackets, is corrosion resistant. The stainless steel calipers we mentioned are stainless steel, so they are rust proof.

Now one thing I did want to zoom in on just to show you, it comes with this Hydrastar Electric Over Hydraulic Brake Actuator. This is designed to activate your trailer brakes when you apply the brakes in your tow vehicle. This will install on your trailer frame and connects to the trailer's wiring. It does include the brake lines. This will help create a nice, smooth, even braking with a fast response time.

And it is designed to work with most in-cab brake controllers. Now the brake line kit we mentioned, it'll come with everything you need. The solid brake lines, flexible brake lines. All the fittings you need for tandem axle trailers. Now we do list on the product page of this product, 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 the disc brakes also offer a substantially shorter stopping distance. The disc brake calipers right here, these will have only one moving part, so there's fewer parts to maintain, fewer parts to get damaged, and fewer parts to have to repair or replace. Again, this kit, the application is for 6,000 pound tandem axle trailers. Bolt pattern of six on five and a half inches. The rotor diameters 12 inches. And we had mentioned the stud diameter on them is half an inch. But that should do it for a look at the Hydrastar Disc Brake Kit with the Electric Over Hydraulic Brake Actuator for Tandem 6,000 pound Trailer Axles.

Ratings & Reviews

4.9

14 reviews
Get 4 rust-resistant hub-rotor assemblies - complete with stainless steel calipers and inner (25580) and outer (15123) bearings - and an electric-over-hydraulic actuator that works with your existing brake controller. Includes lines and fittings.

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Great setup. Really improved the stopping power of my 36' fifth wheel. Just completed a coast to coast trip. The extra stopping power provided additional safety and peace of mind.



by:

Thanks for quickly resolving the shipping problem!!



by:

Installed fairly easily, works great. Stops much faster than the old drum brakes.



by:

It's been working great for the past year. Wish I had the money to put on all of my trailers.



by:

The quality of the product was good. Everything went together and function as intended. Thanks



by:

Parts were shipped and received quickly, everything mounted up right and all the hardware needed was included.



by:

Nice quality, fast shipment, and fairly easy installation. The brake line from the actuator to the first axle is quite long. I will go back with a custom line in the future, for now just coiled it up. William S was extremely helpful with my order.


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See what our Experts say about this Hydrastar Trailer Brakes

  • Roadmaster Comfort Ride and Electric Over Hydraulic for 2019 Grand Design Reflection 311BHS
    Hey John, thanks for all the info on your 2019 Grand Design, Reflection, 311 BHS as that makes it pretty easy to find the correct parts you need. First lets start with the Roadmaster Comfort Ride. Since you have 6k axles the kit you'd want is the part # RM-2460-2570 which comes with the leaf springs and the shocks. Then for a complete kit to convert to electric over hydraulic you would want the Hydrastar part # HYD74VR which comes with everything and the best actuator that is the most...
    view full answer...
  • Can Hydrastar Actuator Be Exposed To Elements
    Hey Ed! The actuator included with the Hydrastar Disc Brake Kit # HYD74VR can indeed be exposed to the elements if you wanted to mount it outside somewhere on the trailer tongue instead of undercover. The construction consists of weathertight seals that will protect the internal components from nature and the aluminum build will prevent any corrosion over time. One word of caution though is to refrain from using a power washer on it or bringing it through a commercial car wash. Doing...
    view full answer...
  • Do the Hydrastar Disc Brake Kits Include Kodiak Brakes?
    Hey Richard! Hydrastar manufactures their own brake calipers and rotors. Kodiak is made by Dexter so the item # HYD74VR kit is not mixed and matched amongst the two companies products. All of the kits use standard ceramic brake pads. The Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers item # HYD74VR is designed for 6,000 lbs axles. The hubs are 12" and have a 6 on 5-1/2" bolt pattern. I recommend checking your Timber Ridge's bearing sizes before purchasing to confirm fitment....
    view full answer...
  • Do Hub/Rotors of Hydrastar Disc Brake Kit Stick Out Further Than Hub Drums
    Hey Kurt, the hub/rotors that come with the Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers # HYD74VR that you referenced do not stick out any further than the hub/drums you have now. These also easily fit behind 15 inch wheels as well so this kit will fit well and drastically improve your trailer's stopping power.
    view full answer...


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Michael B
Updated by:
Michael B
Employee Jeremy F
Written by:
Jeremy F

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