# 1781 Dunbier A1306 Mackay Bearing Buddy (USA) Suits LandCruiser Pair | Marine Trailer Part

🔧 Product Description

  

Dunbier Bearing Buddy USA Protectors for LandCruiser Hubs - Part Number: 1781

  

A spring-loaded grease reservoir and hub protector set for Dunbier LandCruiser six-stud hubs. The moving piston maintains light positive grease pressure as the hub cools after immersion, helping reduce the tendency for water to be drawn past the inner seal.

  

⚙️ Key Features

  

• Spring-loaded grease-pressure piston

• Grease nipple allows replenishment without removing the hub

• Pair services one axle

• Protective plated or manufacturer finish

• Useful for boat trailers exposed to repeated immersion

  

📏 Specifications

  

• Compatibility: Dunbier LandCruiser six-stud hubs

• Reference: Mackay A1306

• Quantity: Pair

• Press-fit hub-bore dimensions must match exactly

• Does not replace the need for correctly adjusted bearings and sound inner seals

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1781

• Related PVC protector covers: Dunbier 1782

• Dust-cap alternative: Dunbier 1740/1740P

• Use only a protector with the correct measured hub bore

  

🚤 Trailer Compatibility & Application

  

• Suits Dunbier LandCruiser six-stud hubs

• Compatible with braked or non-braked hubs only where the cap bore and internal clearance match

• The LandCruiser and Trojan versions are not direct substitutes for standard hub protectors

  

🔌 Function

  

Maintains a small reserve of grease and slight positive pressure at the outer hub to help protect bearings from water entry.

  

Common signs of wear or replacement:

  

• Protector is loose in the hub bore

• Piston remains fully extended or will not move

• Grease leaks excessively around the outer edge

• Grease nipple is blocked or damaged

• Corrosion, dents or spring failure

  

🛠️ Installation & Safety

  

• Measure the clean hub bore before fitting

• Drive the protector in squarely using a suitable block or driver

• Fill gradually until the piston reaches the indicated operating position

• Do not over-pressurise the hub, which can force grease past the inner seal

• Inspect and service wheel bearings at normal intervals

  

📦 Condition

  

• Genuine Dunbier Marine Products trailer component

• Brand new

• Supplied as one pair of bearing protectors

• Supplied in original or equivalent packaging

## Details

- **Price:** 76.95 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 76.95 AUD | In stock |

## Images

- 1781 Dunbier A1306 Mackay Bearing Buddy (USA) Suits LandCruiser Pair | Marine Trailer Part
- 1781 Dunbier A1306 Mackay Bearing Buddy (USA) Suits LandCruiser Pair | Marine Trailer Part
- 1781 Dunbier A1306 Mackay Bearing Buddy (USA) Suits LandCruiser Pair | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1781-dunbier-bearing-buddy-usa-suits-landcruiser-per-pair-mackay-a1306)
> Updated: 2026-08-03