1032 Dunbier Mechanical Override Coupling 3500kg | Marine Trailer Part
1032 Dunbier Mechanical Override Coupling 3500kg | Marine Trailer Part
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🔧 Product Description
Dunbier Mechanical Override Trailer Coupling 50mm – Heavy-Duty – Part Number: 1032
A galvanised 50mm mechanical override coupling with a 3500kg coupling-body rating. Dunbier and Mackay documentation notes that the installed spring and brake-actuation arrangement may be specified for trailers up to approximately 2500kg ATM, so the stamped coupling and trailer compliance information must be checked before use.
⚙️ Key Features
- Heavy-duty 50mm ball coupling
- Mechanical override slide for cable-operated trailer brakes
- Galvanised corrosion-resistant finish
- Integrated handbrake lever
- Adjustable coupling ball clearance and reverse-stop provision
📏 Specifications
- Coupling body rating: 3500kg
- Published spring application: Up to approximately 2500kg ATM
- Tow-ball size: 50mm
- Brake actuation: Mechanical override cable
- Tow ball is not included
🔄 Cross Reference & Related Parts
- Dunbier: 1032
- Adjustment bolt: Dunbier 1011
- Reverse stop and pin: Dunbier 1042C or 1046
- Tow ball: Dunbier 1061
- Related lighter mechanical coupling: Dunbier 1041 / Mackay H3310G
🚤 Trailer Compatibility & Application
- Suitable for trailers with mechanical disc brakes and correctly configured brake cables
- Use only within the lower of the coupling, spring, brake-system and trailer ratings
- Not suitable for hydraulic brake actuation without the correct master-cylinder coupling
🔌 Function
Converts compression of the sliding coupling during braking into cable movement that applies the trailer's mechanical brakes.
⚠️ Common Signs of Failure
- Slide binds, seizes or has excessive play
- Brake cable is not pulled smoothly
- Return spring is weak or broken
- Handbrake ratchet does not hold
- Coupling trigger or ball socket is worn
🛠️ Installation & Safety
- Verify the stamped coupling and spring rating before installation
- Set brake-cable free play so the brakes apply progressively without dragging
- Lubricate specified sliding and pivot points without contaminating brake components
- Check reverse-stop operation
- Have the completed brake system tested by a trailer-brake specialist
📦 Condition
- Brand new Dunbier Marine Products trailer component
- Supplied as one heavy-duty mechanical override coupling without tow ball
- 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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