# 1778 Dunbier Bearing Protectors Pair Suits Trojan 2.2t Axle | Marine Trailer Part

🔧 Product Description

  

Dunbier Bearing Protectors for Trojan 2.2-Tonne Axles - Part Number: 1778

  

A spring-loaded grease reservoir and hub protector set for Trojan 65mm square 2.2-tonne 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: Trojan 65mm square 2.2-tonne hubs

• Reference: Trojan-specific hub bore

• 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: 1778

• 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 Trojan 65mm square 2.2-tonne 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:** 103.05 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 103.05 AUD | In stock |

## Images

- 1778 Dunbier Bearing Protectors Pair Suits Trojan 2.2t Axle | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1778-dunbier-bearing-protectors-per-pair-suits-trojan-2-2t-axle)
> Updated: 2026-08-03