7205 Dunbier H3038 Mackay Breakaway Switch | Marine Trailer Part
7205 Dunbier H3038 Mackay Breakaway Switch | Marine Trailer Part
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide
🔧 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 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
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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