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  1. Trailer Brakes
  2. Hydrastar
  3. Disc Brakes
  4. 3500 lbs Axle
  5. Hub and Rotor
  6. Standard Grade
Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Rotor - 5 on 4-1/2 - 3.5K
Hydrastar

Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" Rotor - 5 on 4-1/2 - 3.5K

Part Number: HYD42FR
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$1,704.89
Trailer Brakes
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Get 4 rust-resistant hub-rotor assemblies - complete with inner (L68149) and outer (L44649) 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 - 10" Rotor - 5 on 4-1/2 - 3.5K part number HYD42FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Hydrastar Trailer Brakes - HYD42FR

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

Get 4 rust-resistant hub-rotor assemblies - complete with inner (L68149) and outer (L44649) 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
  • 4 Dacromet-coated disc brake end kits
    • Hub-rotor assemblies include bearings, races, seals, and grease caps
    • Calipers with mounting brackets and hardware
  • 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 with hub-and-rotor assemblies, calipers, bearings, and grease seals
  • 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.



E3K-T1 Hydra Star Disc Brake Kit with Electric-Over-Hydraulic Actuator for Double Axle Trailers - 10" Diameter Rotor - 3,500-lb Rating





Video of Hydrastar Disc Brake Kit w/ Actuator for Tandem Axle Trailers - 10" 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 - Tandem Axle Disc Brake Kit - HYD42FR

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 3,500 pound trailer axles. And these have a five on four and a half inch bolt pattern. Now this is an all inclusive kit. It'll have everything here you can see that you need to switch your trailer over to disc brakes for improved performance and greater stopping power.

You'll get four Dacromet coated disc brake end kits. So it's basically for two axles. The hub and rotor assemblies right here, they'll have half inch diameter wheel studs. And also on the inside, they pre-install the bearing races, so it makes it easier to install. Comes with all the bearings you need, the inner and outer bearings.

The grease seals are included. The calipers will come with all the brake pads installed in them, and it comes with the installation bolts. And as you can see, we've already attached them. It comes with the caliper mounting brackets. And these are designed to attach, you can see, to a four bolt brake flange on your axle.

All these parts have a Dacromet coating to 'em, which is corrosion resistant. Now the actuator right here in the middle, this is a Hydrastar Electric Over Hydraulic Brake Actuator. Basically, this will hard wire into your tow vehicle and it signals your in-cab brake controller when the brakes are applied, which will trigger the pump and motor on the actuator. So this will create a nice, smooth, even braking with a fast response time. And it is designed to work with most in-cab brake controllers.

The brake controllers, we also sell separately. The brake line kit, you can see up front here, it comes with all the solid brake lines you need, all the flexible brake lines, and all the fittings you need to install it onto your Tandem axle trailer. Now we do list the part numbers for all these products on the product page of this, if you do need to know any of the part numbers that's included. Now more and more people are switching their trailers over to disc brakes, and with good reason. It's because, unlike drum brakes, these disc brakes will deliver consistent braking, even at highway speeds. Disc brakes will also offer substantially shorter stopping distances. And the disc brake calipers, these will 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. Application, again, for this kit is Tandem axle trailers with 3,500 pound axles. Bolt pattern of five on four and a half inches. Rotor diameter of 10 inches. And the wheel stud diameter of a half an inch. But that should do it for review on the Hydrastar 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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