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  1. Trailer Brakes
  2. Hydrastar
  3. Disc Brakes
  4. 3500 lbs Axle
  5. Rotor
  6. Standard Grade
Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - Slip On Rotor - 5 on 4-1/2 - 3.5K
Hydrastar

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

Part Number: HYD34VR
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$1,639.95
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 - 5 on 4-1/2 - 3.5K part number HYD34VR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Hydrastar Trailer Brakes - HYD34VR

  • Disc Brakes
  • 3500 lbs Axle
  • Rotor
  • Standard Grade
  • 5 on 4-1/2 Inch
  • Hydrastar
  • 1/2 Inch Studs

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: 3,500 lbs
  • Bolt pattern: 5 on 4-1/2"
  • Rotor diameter: 10"
  • Wheel stud diameter: 1/2"
  • 2-Year limited warranty


Bearings, Race, and Seal Information:

  • Bearings
    • Inner bearing: L68149
    • Outer bearing: L44649
  • Races
    • Inner race: L68111
    • Outer race: L44610
  • Grease seal
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

Complete Kit Includes:

  • Electric-over-hydraulic trailer brake actuator
  • 3.5K disc brake kit over-the-hub rotors
  • Stainless steel calipers
  • Hydraulic tandem-axle brake line kit
    • (1) 188" Long brake line with 3/8"-24 inverted flare nuts
    • (1) 76" Long brake line with 3/8"-24 inverted flare nuts
    • (2) 48' Long brake line with 3/8"-24 inverted flare nuts
    • (4) 21" Male/male rubber flex lines with 3/8"-24 inverted flare nuts
    • (1) 3/8" Brass T-fitting
    • (1) 3/8" Brass 4-way fitting
    • (2) 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.



E3K-T1SOSSC Hydra Star Disc Brake Kit with Electric-Over-Hydraulic Actuator for Double Axle Trailers - Stainless Steel Calipers - 10" Diameter Slip On Rotor - 3,500-lb Rating





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

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 - Slip On Disc Brake Kit - HYD34VR

Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at this Hydrastar slip-on rotor disc brake kit with the electric over hydraulic brake actuator. And this is for tandem 3,500 pound trailer axles with the five on four and a half inch bolt pattern. Now this-all inclusive kit has everything you need to switch your trailer over to disc brakes for improved performance and greater stopping power. These over-the-hub rotors are easy to install. Basically they'll fit over your standard idler hubs, and they're held in place by the existing wheel lug nuts.

And there's no need to have to replace an entire hub and rotor assembly if only your hub or rotor becomes damaged. Now all these parts on the table are all included. It's four disc brake end kits for two axles. As we mentioned, the slip-on Dacromet coated cast iron rotors, the inner and outer bearings are included. The grease seals, the stainless steel calipers with the brake pads, and the installation bolts all included.

And right here it includes the Dacromet-coated caliper mounting brackets, which are designed to attach to a four bolt brake flange. Now the Dacromet coating that's on the rotors and the caliper mounting brackets is corrosion-resistant. The stainless steel calipers are rust-proof. Now I did wanna zoom in on this brake actuator. It's an electric over hydraulic brake actuator.

It'll activate your trailer brakes when you apply the brakes in your tow vehicle. This will install on your trailer frame, and it connects to your trailer's wiring and comes with the included brake lines that are needed. This will create a nice, smooth, even braking with fast response time, and it is designed to work with most in-cab brake controllers, which we do sell separately. Now the brake line kit we mentioned, it includes the solid brake lines, the flexible lines over here, and all the fittings you need for installation 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. Unlike drum brakes, disc brakes will deliver consistent braking even at highway speeds. And disc brakes also offer a substantially shorter stopping distance. And these brake calipers have only one moving part, so there are fewer parts that you have to maintain, fewer parts to get damaged, and fewer parts to have to repair or replace. Now the application again for this kit is tandem axle trailers with 3,500 pound axles. The bolt pattern, five on four and a half inches, and the diameter on the rotors is 10 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 3,500 pound trailer axles.

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jeremy F
Written by:
Jeremy F

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