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

Name: Hydrastar® Xtra-Capacity Electric Over Hydraulic (EOH) Trailer-Mounted Brake Actuator w/ Expanded 1 Quart Reservoir
Brand: Hydrastar
SKU: *EC381-7065
Price: 1157.00 USD
Availability: InStock

SKU

by Hydrastar

$1,157.00 - $1,157.00

$1,157.00

$1,157.00 - $1,157.00

$1,157.00

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

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

Quantity

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.

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	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

– Brake lines & fittings

– Breakaway kit & battery

– Wiring harness

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.

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