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Hydrastar Xtra Capacity Electric Over Hydraulic (EOH) Plug In Play Actuator w/ Controller Adapter Module (CAM) - 4 Way Flat Connector

Hydrastar® Xtra Capacity Electric Over Hydraulic (EOH) Plug In Play Actuator w/ Controller Adapter Module (CAM) - 4 Way Flat Connector

SKU
by Hydrastar
$1,304.00 - $1,304.00
$1,304.00
$1,304.00 - $1,304.00
$1,304.00

Xtra-Capacity actuator with the industry's largest reservoir (1 quart / 32 oz). The expanded volume improves braking on trailers with 2–3 axles or heavy loads. Translucent tank for quick visual fluid checks. Delivers up to 1,600 PSI for disc and drum brakes.

1,000–1,600 PSI
1–3 Axles
2 YR Warranty
DOT Compliant
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
Questions about fitment?

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

Additional Details

Specifications & Compliance

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The Hydrastar® Xtra Capacity Electric Over Hydraulic (EOH) brake actuators lead the industry not only in ease of installation but also in compliance with all Department of Transportation (D.O.T.) braking requirements. Designed to significantly enhance stopping performance, Hydrastar® is the choice for trailers transporting horses, cars, construction, and farm equipment, ensuring the highest level of braking safety with the industry's fastest response time.
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Largest Capacity for Enhanced Braking
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This industry-leading brake fluid reservoir boasts a capacity exceeding 1 quart (32 oz), ideal for larger volume applications. The increased fluid volume improves braking performance and fluid displacement.
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Easy Fluid Level Monitoring
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The translucent tank allows for quick visual inspection of the brake fluid level, making it easier to identify potential leaks or fluid loss.
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2-Year Limited Warranty: Peace of mind with a 2-year limited warranty from the date of purchase.
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Regulatory Compliance: Meets CFR-393 Federal Braking Requirements and all Department of Transportation (D.O.T.) regulations.
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Versatile Brake Compatibility: Suitable for Drum and Disc Brakes, featuring reliable 12 V DC operation and solid-state electronics.
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Easy Installation: Equipped with color-coded, heavy-duty 12 Gauge wire for a quick setup (Black for constant power, Blue for the brake controller, White for ground, Yellow for break-away).
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Flexible Wire Length: Includes 4 ft. of wire, providing ample length for any customization needs.
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Fluid Requirements: Designed for use with D.O.T. 3 or 4 Brake Fluid (not included).
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Universal Compatibility: Fits any trailer configuration with 1-3 axles, offering wide application flexibility.
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Experience effortless setup with the Hydrastar® MARINE Plug ‘n’ Play system, which includes:
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Break-away Battery Kit
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Plug ‘n’ Play Harness - 4 Way Flat Connector
Why It's Better

Plug & Play EOH Braking With CAM Included

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.

Built, Not Cast

Extruded anodized aluminum housing. Fully sealed. Not cast metal or plastic.

Specifications

Technical Details

Type Electric Over Hydraulic (EOH)
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
Dimensions 11-3/4" L x 3" W x 7-3/8" H
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
✓ Pre-wired Plug & Play harness
✓ Controller Adapter Module (CAM)
Sold Separately
– DOT 3 or DOT 4 brake fluid
Common Questions

Before You Buy

Which PSI should I choose?+
1600 PSI for disc brakes — covers most applications. 1200 PSI for heavy-duty drum brakes on 7K+ lb axles. 1000 PSI for standard drum brakes under 7K lbs.
Do I need a CAM?+
No. The GEN 8 works with all brake controllers without adapters. Exception: 2024–2026 GM trucks need a diode module (#381-7074).
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.
Compatibility

Tow Vehicle Brake Controller Chart

Vehicle Year Compatible CAM Needed
Ford 2005–2006 Yes No
2007–2008 No Yes
2009–Current Yes No
Dodge / RAM 2010–Current Yes No
GM / Chevy 2007–2016 No Yes
2017–Current Yes No
Toyota 2016–Current Yes No

Applies to HBA-CAM 381-7073. GEN 8 actuators (2024+) do not require a CAM for most vehicles.

Most aftermarket brake controllers are compatible with EOH technology. Always confirm with the controller manufacturer. Download full compatibility chart (PDF) ↗

2024–2026 GM Truck & SUV Owners

Dashboard showing “Service Trailer Brakes”? Brakes disabled?

Affects Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Colorado, Canyon & Hummer EV with integrated trailer brake controller.

That’s a known GM compatibility issue across the 2024–2026 lineup. Hydrastar has the fix — the GM Diode Module (#381-7074) is a plug-and-play inline solution.

New Ford Truck Owners

Connectivity issues before or after the dealer flash? Brakes dropping in and out?

Affects new Ford trucks when switching from electric mode to EOH mode.

Our Hydrastar Controller Adapter Module (#381-7073) has been very successful resolving this for Ford owners. Note: this is not a Hydrastar issue — just a Hydrastar part that helps.

Documentation

Manuals & Resources

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

2021–2022 Ford Recall: A software error may cause trailer brakes to fail on F-150, F-250, F-350, F-450, F-550, Maverick, Expedition, and Lincoln Navigator. Certified Ford dealers will update the brake control module software free of charge. Check your VIN at NHTSA.gov.

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 ↘
or call (812) 655-4544 · Mon–Fri, 8am–4:30pm ET