1041 Dunbier H3310G Mackay Mechanical Override Coupling 2000kg | Marine Trailer Part

🔧 Product Description

Dunbier Mechanical Override Trailer Coupling 50mm – 2000kg Application – Part Number: 1041

A galvanised 50mm mechanical override coupling used on cable-operated trailer brake systems. Dunbier catalogues list the coupling for 2000kg trailer applications, while later Mackay H3310G documentation describes a higher-rated coupling body with a spring selected for lower ATM use. The permanent rating stamped on the supplied component and the trailer compliance plate must govern installation.

⚙️ Key Features

• 50mm mechanical override ball coupling
• Integrated sliding brake actuator
• Galvanised finish
• Handbrake lever for parking-brake operation
• Adjustable ball-head clearance and reverse-stop provision

📏 Specifications

• Dunbier catalogue application: 2000kg
• Tow-ball size: 50mm
• Brake actuation: Mechanical cable
• Mackay reference: H3310G
• Tow ball is not included

🔄 Cross Reference & Related Parts

• Dunbier: 1041
• Mackay: H3310G
• Adjustment bolt: Dunbier 1011
• Reverse stop and pin: Dunbier 1042C or 1046
• Tow ball: Dunbier 1061 / Mackay H3354
• Master cylinder H3341 applies to hydraulic configurations, not this mechanical cable version

🚤 Trailer Compatibility & Application

• Suitable for compatible boat trailers using mechanical disc brakes
• Cable pull direction and drawbar mounting must match the existing system
• Use only to the stamped rating of the supplied coupling

🔌 Function

Uses trailer overrun movement to pull the mechanical brake cable and apply the trailer brakes.

⚠️ Common Signs of Failure

• Coupling slide sticks or fails to return
• Brakes apply late, unevenly or remain engaged
• Handbrake lever does not hold
• Cable attachment hole or pivot is worn
• Ball socket has excessive play

🛠️ Installation & Safety

• Install with rated high-tensile hardware
• Adjust coupling clearance, cable free play and handbrake travel
• Confirm the reverse stop prevents unwanted brake application while reversing
• Lubricate only the points specified by the manufacturer
• Road-test progressively after installation

📦 Condition

• Brand new Dunbier Marine Products trailer component
• Supplied as one complete mechanical override coupling without tow ball
• Supplied in original or equivalent packaging