# 1850 Dunbier H3068 Mackay Hydraulic Flexible Hose | Marine Trailer Part

🔧 Product Description

  

Dunbier Hydraulic Flexible Brake Hose - Part Number: 1850

  

A flexible hydraulic brake hose used between moving trailer components or between rigid line and a caliper/coupling connection. The hose accommodates suspension and steering-like movement without placing bending load on rigid brake tube.

  

⚙️ Key Features

  

• Pressure-rated trailer hydraulic brake hose

• Flexible construction for moving joints

• Compatible flare fittings at both ends

• Marine-trailer replacement component

• Mackay cross-reference H3068

  

📏 Specifications

  

• Mackay: H3068

• Exact hose length and end threads must match the original

• Use with compatible trailer brake fluid

• Do not twist during installation

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1850

• Mackay: H3068

• Braided stainless alternatives: Dunbier 1893-1901

• Copper sealing gasket: Dunbier 1881 where the fitting design requires it

  

🚤 Trailer Compatibility & Application

  

• Suits compatible Dunbier hydraulic brake systems

• Commonly installed at calipers, axles or coupling transitions

• Not a universal automotive hose; verify flare and thread

  

🔌 Function

  

Carries pressurised brake fluid while flexing with axle, caliper or coupling movement.

  

Common signs of wear or replacement:

  

• Cracks, bulges or abrasion on the hose cover

• Fluid seepage at the crimp or fittings

• Hose twists, kinks or rubs the tyre

• Brake drag from internal hose collapse

• Soft pedal or pressure loss

  

🛠️ Installation & Safety

  

• Replace any damaged hose immediately

• Route with full suspension and coupling movement considered

• Use new sealing washers where specified

• Bleed the system after installation

• Keep brake fluid away from painted surfaces

  

📦 Condition

  

• Genuine Dunbier Marine Products trailer component

• Brand new

• Supplied as one hydraulic flexible brake hose

• Supplied in original or equivalent packaging

## Details

- **Price:** 18.5 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 18.50 AUD | In stock |

## Images

- 1850 Dunbier H3068 Mackay Hydraulic Flexible Hose | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1850-dunbier-hyd-flexible-hose-mackay-h3068)
> Updated: 2026-08-05