1014 Dunbier H3323G Mackay Coupling 70mm, 4500kg | Marine Trailer Part

🔧 Product Description

Dunbier Heavy-Duty Trailer Coupling 70mm - 4500kg - Part Number: 1014

A heavy-duty painted trailer coupling for a 70mm tow ball and trailer applications up to the coupling's marked 4500kg rating. This listing is for the coupling body without the tow ball, allowing replacement on compatible heavy boat and equipment trailers.

⚙️ Key Features

• Heavy-duty 70mm ball coupling

• 4500kg catalogue rating

• Positive heavy-duty latch and locking mechanism

• Painted steel finish

• Designed for trailers above conventional 50mm coupling capacity

📏 Specifications

• Coupling rating: 4500kg

• Tow-ball size: 70mm

• Finish: Painted steel

• Tow ball: Not included

• Mounting pattern must be verified against the drawbar

🔄 Cross Reference & Related Parts

• Dunbier: 1014

• Mackay: H3323G

• Matching 70mm tow ball: Dunbier 1045 / Mackay H3356

• Complete coupling-and-ball package may be catalogued separately

• Comparable category: Rated 70mm heavy-trailer couplings with matching mounting and certification

🚤 Trailer Compatibility & Application

• Suitable for compatible heavy boat, plant and equipment trailers

• The towing vehicle must have a rated 70mm ball, towbar and attachment system

• Trailer braking, breakaway and safety-chain requirements must match the trailer ATM

🔌 Function

Locks onto a rated 70mm tow ball to provide the primary articulated connection for a heavy trailer.

Common signs of wear or replacement:

• Latch does not engage fully

• Excessive movement on the 70mm ball

• Cracking, deformation or damaged mounting holes

• Corrosion or scoring inside the ball socket

• Safety lock or trigger will not retain the closed position

🛠️ Installation & Safety

• Use only with a correctly rated 70mm tow ball

• Install with engineering-approved mounting hardware and drawbar reinforcement

• Verify the stamped coupling rating before use

• Use the required number and grade of safety chains

• Have heavy-trailer coupling work inspected by a qualified trailer specialist

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one 70mm heavy-duty coupling without tow ball

• Supplied in original or equivalent packaging