7205 Dunbier H3038 Mackay Breakaway Switch | Marine Trailer Part

🔧 Product Description

Dunbier Trailer Breakaway Switch - Part Number: 7205

A genuine-style service component for Hydrastar, iQ7 and compatible powered brake systems when wired accordingly. The supplied component is pull-pin emergency switch; Mackay H3038 and is used to activates the trailer brakes if the trailer separates from the tow vehicle.

⚙️ Key Features

• Application: Hydrastar, iQ7 and compatible powered brake systems when wired accordingly

• Component: pull-pin emergency switch; Mackay H3038

• Designed for electric-over-hydraulic trailer braking

• Direct service replacement when the actuator model matches

• Marine-trailer maintenance component

📏 Specifications

• Type: pull-pin emergency switch; Mackay H3038

• System: Hydrastar electric-over-hydraulic braking

• Compatibility must be confirmed from actuator generation and service reference

🔄 Cross Reference & Related Parts

• Dunbier: 7205

• Mackay: H3038

• Use with a charged compliant breakaway battery

🚤 Trailer Compatibility & Application

• Suitable for Hydrastar, iQ7 and compatible powered brake systems when wired accordingly

• Hydraulic and electrical work must match the actuator service manual

• Not interchangeable across actuator generations without part-number confirmation

🔌 Function

Activates the trailer brakes if the trailer separates from the tow vehicle.

Common signs of wear or failure:

• Fluid or moisture enters around the component

• Component is cracked, corroded or electrically open

• Brake warning or breakaway test fails

• Actuator operation becomes intermittent

• Connector, pin or fitting shows heat or corrosion damage

🛠️ Installation & Safety

• Disconnect trailer power and relieve hydraulic pressure before service

• Use only clean compatible brake fluid and fittings

• Follow Hydrastar bleeding and wiring procedures

• Test normal braking and breakaway operation after repair

• Brake-system repairs should be completed by a competent technician

📦 Condition

• Genuine Dunbier Marine Products part

• Brand new

• Supplied as one trailer breakaway switch

• Supplied in original or equivalent packaging