# 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 wear or replacement:

  

• 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

## Details

- **Price:** 22.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 22.00 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1046-dunbier-brake-coupling-reverse-stop-pin-clamshell)
> Updated: 2026-08-05