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Hydrastar Xtra-Capacity Electric Over Hydraulic (EOH) Trailer-Mounted Brake Actuator w/ Expanded 1 Quart Reservoir

Hydrastar® Marine Xtra-Capacity Electric Over Hydraulic (EOH) Trailer-Mounted Brake Actuator w/ Expanded 1 Quart Reservoir

SKU
by Hydrastar
$1,191.00 - $1,191.00
$1,191.00
$1,191.00 - $1,191.00
$1,191.00

Marine-rated Xtra-Capacity actuator with the industry's largest reservoir (1 quart / 32 oz) for multi-axle boat trailers. Sealed anodized aluminum housing with stainless hardware and EPDM gaskets rated for submersion. Delivers up to 1,600 PSI for disc and drum brakes on 1–3 axle trailers.

1,000–1,600 PSI
1–3 Axles
2 YR Warranty
MARINE Rated
American Flag Made in the USA
Which PSI Do I Need? Select From Dropdown Below
1600 PSI Disc brakes Most applications — recommended
1200 PSI Heavy-duty drum brakes 7K+ lb axles
1000 PSI Standard drum brakes Under 7K lbs
Not sure? Disc brakes or converting to disc = 1600 PSI. Call (812) 655-4544
What You Need to Know

Key Features & Specs

EOH Actuator
  • ✓Sealed, fully enclosed extruded anodized aluminum housing (not cast or plastic)
  • ✓Reliable 12 V DC operation with solid-state electronics
  • ✓Designed for both Drum and Disc Brake applications
  • ✓Color-coded, heavy duty 12 Gauge wire (Black/Constant power, Blue/Brake controller, White/Ground, Yellow/Break-away)
Compliance & Certifications
  • ✓Complies with CFR-393 Federal Braking Requirements
Questions about fitment?

Feel free to reach out to us or start a live chat in the bottom right corner for assistance.

Why It's Better

The Only EOH Actuator That Works With Every Controller

Largest Reservoir

Over 1 quart (32 oz) of fluid capacity. Translucent tank for visual level checks. Better performance on multi-axle trailers.

Instant Response

12V DC pump fires the moment your brake controller sends a signal. No surge delay.

No CAM Needed

The only EOH actuator universally compatible with every brake controller. No adapter modules.

Saltwater Sealed

Stainless hardware, EPDM gaskets, and vented backing plate. Built for submersion at the boat ramp.

Specifications

Technical Details

Type Electric Over Hydraulic (EOH) — Marine Grade
Reservoir Over 1 quart (32 oz) — largest in the industry
Max Pressure 1,600 PSI (also available: 1,200 & 1,000)
Brakes Disc and drum
Axles 1–3 axles, any configuration
Housing Extruded anodized aluminum, sealed, stainless hardware, EPDM gaskets
Dimensions 16.4"L x 5.4"W x 11" Tall
Power 12V DC, solid-state electronics
Hydraulic Port 3/16"
Wire 12 AWG, color-coded — Black (power), Blue (controller), White (ground), Yellow (breakaway)
Fluid DOT 3 or DOT 4. Do not use DOT 5.
Controllers All factory in-dash & aftermarket — no CAM required. *Verify with your controller manufacturer that it is EOH compatible.
Compliance DOT · CFR-393 Federal Braking Requirements
Warranty Actuator: 2 years · Brakes & components: 3 years
Origin Made in the USA — Greendale, Indiana
What You Get

In The Box & Sold Separately

Included
✓ GEN 8 EOH brake actuator
✓ 12 AWG wiring harness
✓ Mounting hardware
✓ Installation guide
Sold Separately
– DOT 3 or DOT 4 brake fluid
Common Questions

Before You Buy

Do I need a CAM (Controller Adapter Module)?+
No. The GEN 8 works with all factory and aftermarket brake controllers without any adapter. This is the only EOH actuator on the market with universal compatibility.
Can I submerge it at the boat ramp?+
Yes. The marine actuator is sealed for submersion during launch and retrieval.
Is the buzzing noise normal?+
Yes. That’s the pump building and holding pressure. Completely normal.
How do I bleed the system?+
Start at the furthest caliper. Open the bleeder, pump DOT 3 through until no air bubbles. Work toward the actuator. Two full passes.
What fluid does it use?+
DOT 3 or DOT 4. Do not use DOT 5 — silicone fluid will damage the seals.
Documentation

Manuals & Resources

Technical Manual ↗
Installation & service guide
Electrical Diagrams ↗
Wiring schematics
Compatibility Chart ↗
Vehicle & controller reference

Caution: Do not power wash the actuator or take it through a commercial car wash. High-pressure water may damage the seals.

Need Help Choosing?
Our team has helped thousands of trailer owners find the right setup.
Fastest response? Use the chat bubble in the bottom-right corner ↘
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or call (812) 655-4544 · Mon–Fri, 8am–4:30pm ET