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

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

SKU
by Hydrastar
$1,099.00 - $1,099.00
$1,099.00
$1,185.00
$1,185.00 - $1,185.00
$1,185.00

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
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

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.

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 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).
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.
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 Silverado, Sierra & Denali Owners

Dashboard showing “Service Trailer Brakes”? Brakes disabled?

That’s a known GM software issue. Hydrastar has the fix — the GM Diode Module (#381-7074) is a plug-and-play inline solution.

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