1042C Dunbier Brake Coupling Reverse Stop and Pin Clamshell Pack 1046 | Marine Trailer Part

🔧 Product Description

Dunbier Brake-Coupling Reverse Stop and Pin – Clamshell Pack – Part Number: 1042C

A retail clamshell-packaged reverse-stop and retaining-pin set for selected Dunbier mechanical and hydraulic override couplings. The stop temporarily restricts coupling-slide movement when reversing a trailer whose brake system would otherwise apply from reverse overrun force.

⚙️ Key Features

• Packaged replacement reverse-stop assembly
• Includes the stop and retaining pin
• Designed for selected Dunbier override couplings
• Quick removable arrangement for reversing
• Retail clamshell packaging

📏 Specifications

• Packaging reference: Dunbier 1042C
• Underlying/bulk component reference: Dunbier 1046
• Mackay related reference: H3343 reverse stop and bolt
• Exact stop profile must match the coupling slide

🔄 Cross Reference & Related Parts

• Dunbier: 1042C
• Dunbier bulk/reference component: 1046
• Mackay: H3343
• Used with selected Dunbier 1030, 1032 and 1041 override couplings

🚤 Trailer Compatibility & Application

• Suitable only for override couplings designed with the matching reverse-stop location
• May not be required with free-backing brakes or electrically controlled reverse lockouts
• Remove or disengage the stop before normal forward towing where specified

🔌 Function

Prevents the override coupling from compressing and applying trailer brakes during reversing.

⚠️ Common Signs of Failure

• Pin is bent, loose or missing
• Stop no longer fits securely
• Coupling still compresses with the stop installed
• Stop interferes with normal forward operation
• Corrosion or wear allows unintended release

🛠️ Installation & Safety

• Confirm the trailer cannot roll before fitting or removing the stop
• Use only during reversing and follow the coupling instructions
• Ensure the stop is removed or placed in its travel position before forward towing
• Never use an improvised bolt that can damage the coupling
• Replace the complete set if the pin-retention method is unreliable

📦 Condition

• Brand new Dunbier Marine Products trailer component
• Supplied as one clamshell-packed reverse stop and pin set
• Supplied in original or equivalent packaging