Trailer Braking Systems / Electric-Over-Hydraulic
Hydrastar 1,000 PSI Electric-Over-Hydraulic Actuator for Trailer Drum Brakes
SKU: HBA-10
Upgrade to instant, proportional braking that eliminates surge lag and provides total control when backing up or navigating steep grades.
"To maximize the life of your Hydrastar, always flush your brake fluid annually and inspect your 7-way plug for corrosion to ensure a clean 12V power signal."
Fits Single & Tandem Axles up to 7,000 lbs
Anodized Corrosion-Resistant Build
Overview
The Hydrastar 1,000 PSI actuator is the ultimate performance upgrade for trailers with hydraulic drum brakes. Unlike traditional surge couplers that require physical movement at the hitch to apply pressure, this electric-over-hydraulic (EOH) system triggers the moment you touch your vehicle's brake pedal. Utilizing a 12V DC power source and an electronic proportional valve, it delivers smooth, jerk-free stopping power that matches the intensity of your brake controller. This ensures your trailer stays in line without the "push" feeling common in surge systems.
R&P Service Insight
This system is a game-changer for marine and boat trailers where corrosion and steep ramps are constant factors.
- No Lockouts: Back up freely without pinning the coupler.
- Vented Housing: Releases heat and moisture to protect electronics.
- Standard Fittings: Uses common 3/16" hydraulic lines.
R&P Knowledge Hub
Compatibility: Designed specifically for hydraulic drum brakes. Not for use with disc brake systems (which require 1,600 PSI).
Vehicle / System Fit: Suitable for single or tandem axle trailers with a total rating up to 7,000 lbs.
Installation Notes: Requires an in-cab electric brake controller and a 5-amp-hour breakaway battery kit (sold separately).
Performance Insight: The extruded anodized aluminum housing provides superior salt-water resistance, making it the preferred choice for marine applications.
R&P Repair Insight
When converting from a surge coupler to EOH, ensure you verify your current brake type. Use the following checklist to ensure a successful install:
- Pressure Check: Confirm your trailer has Drum Brakes (1,000 PSI).
- Wiring Prep: Ensure your tow vehicle has a 7-way plug with a dedicated 12V power lead.
- Mounting Space: Unit dimensions are 11-3/4" L x 3" W x 7-3/8" H; verify frame clearance.
Features
Instant Response
Eliminate the lag of surge couplers; brakes activate the moment the brake pedal is depressed.
Effortless Reversing
No manual lockouts or pins required to back up your trailer, even on inclines.
Marine-Grade Build
Anodized aluminum housing and weathertight seals defend against water and road grime.
Proportional Control
The electronic valve mirrors the vehicle's braking intensity for smooth, balanced stops.
Specifications
Specification
Detail
Part Number
HBA-10
Product Type
Electric-Over-Hydraulic Actuator
Application
Drum Brakes Only
Material / Finish
Anodized Extruded Aluminum
Max Pressure
1,000 PSI
Dimensions
11.75" x 3" x 7.375"
Power Input
12V DC
Port Size
3/16" Hydraulic Port
Fitment / Application
Category
Details
Axle Count
Single or Tandem Axle
Max Capacity
7,000 lbs
Brake Type
Hydraulic Drum Brakes
Notes
Not compatible with Hydraulic Disc Brakes due to PSI requirements.
Included Components
Quantity
Item
1
Hydrastar 1,000 PSI Actuator Unit
1 Set
Frame Mounting Hardware
Built-In
Bleeder Screw for Easy Maintenance
4-Wire
Pre-attached Lead Wires (Black, Blue, Yellow, White)
Installation Requirement: To ensure emergency safety compliance, this actuator must be paired with a 5-amp-hour (minimum) breakaway battery kit. Verify your tow vehicle's brake controller is compatible with Electric-Over-Hydraulic systems.
Shop Related Parts & Fitment Options
Hydrastar HBA-10 EOH actuator, 1000 psi hydraulic drum brake actuator, electric over hydraulic trailer brakes, marine trailer brake actuator, tandem axle drum brake pump, boat trailer EOH conversion.
