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

🔧 Product Description

Dunbier Brake-Coupling Reverse Stop and Pin – Part Number: 1046

The underlying Dunbier reverse-stop and pin assembly used with selected hydraulic and mechanical override couplings. This component is the bulk/reference version associated with the 1042C clamshell-pack listing and prevents the coupling slide from operating the brakes during controlled reversing.

⚙️ Key Features

• Coupling reverse-stop component
• Includes matching retaining pin as supplied
• Fits selected Dunbier override couplings
• Reusable removable design
• Bulk/component reference corresponding with packaged 1042C

📏 Specifications

• Dunbier component reference: 1046
• Packaged reference: 1042C
• Related Mackay reference: H3343

🔄 Cross Reference & Related Parts

• Dunbier: 1046
• Clamshell packaged version: Dunbier 1042C
• Used with selected 1030, 1032 and 1041 couplings

🚤 Trailer Compatibility & Application

• Suitable only for couplings with the matching reverse-stop slot or hole
• Check whether the installed brakes are free-backing before using a manual stop
• The stop is not a substitute for correct brake adjustment

🔌 Function

Restricts coupling compression while reversing so overrun force does not apply the trailer brakes.

⚠️ Common Signs of Failure

• Stop or pin is bent
• Pin no longer retains positively
• Stop falls out during manoeuvring
• Coupling remains locked during forward towing
• Heavy wear or corrosion changes the fit

🛠️ Installation & Safety

• Install only while stationary and secure the trailer against movement
• Remove or disengage before forward travel as instructed
• Do not replace the pin with unsuitable hardware
• Store the stop in a secure location when not in use
• Check normal brake actuation after removing the stop

📦 Condition

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