SeaStar HA5482 EPS Electric Power Steering Fluid 1 Qt.

SeaStar HA5482 Electronic Power Steering (EPS) Fluid - 1 Quart

The Dometic SeaStar HA5482 is the OEM Electronic Power Steering (EPS) fluid for Dometic SeaStar Optimus EPS systems, including Optimus 360 joystick-equipped boats. As well as the SeaStar High Pressure Hydraulic Power Assist (PA1200-2HP & PA1200-3HP) It is blended for the pressure, temperature, and antifoam requirements of EPS pumps and actuators and helps ensure smooth, quiet steering and long component life.

At a Glance

• Part No.: HA5482
• Size: 1 quart (946 mL)
• For systems: Dometic SeaStar Optimus EPS and Optimus 360 joystick systems
• Formulation: EPS-specific fluid with anti-wear, anti-foam, and corrosion inhibitor package
• Note: Do not mix with standard SeaStar or BayStar hydraulic steering fluid

Where it is used

• Optimus EPS outboard systems - including setups that add Optimus 360 joystick, SeaWays, and SeaStation features
• SeaStar Power Assist High Pressure - PA1200-2HP & PA1200-3HP
• Top-offs and complete services after component replacement, reservoir service, or line maintenance per the Optimus manuals

Compatibility Notes

• EPS only: HA5482 is for Electronic Power Steering systems. For manual hydraulic SeaStar/BayStar systems use SeaStar Hydraulic Steering Fluid (qt HA5430, gal HA5440), not HA5482.
• Do not mix fluids: If the system has been filled with a different fluid, follow the Optimus service procedure to purge and refill with HA5482.

Related Items - Helpful Cross-Refs

Installation Overview - Filling and Top-Off

This quick overview is for planning only. Always follow the Optimus EPS installation and user manuals for your exact system.

1. Inspect reservoir, hoses, and fittings. Repair leaks before filling.
2. Use HA5482 only. Pour slowly into the reservoir to minimize aeration.
3. Purge per the Optimus EPS service procedure. For complete services, use the specified purge method and tools.
4. Verify level after purge and a short function test. Recheck after sea trial.

Maintenance Guidelines

• Store sealed bottles in a cool, dry place. Keep the fill area clean to avoid contamination.
• Do not mix with non-EPS fluids. If contamination is suspected, perform a full purge and refill.
• Follow the manual's inspection interval for hoses, fittings, and electrical connectors at actuators and pumps.

FAQs

• Can I use SeaStar hydraulic fluid instead? No - manual hydraulic fluid (HA5430/HA5440) is for SeaStar/BayStar hydraulic systems only. Optimus EPS requires HA5482.
• Is HA5482 compatible with Optimus 360? Yes - Optimus 360 builds on the Optimus EPS base system and uses HA5482.
• How much fluid do I need? Capacity varies by system and hose length. Check the Optimus EPS manual and always keep an extra quart on hand for service and top-offs.

Downloads and Resources

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