A1305-2 Mackay 1779 Dunbier Bearing Protectors Per Pair Clamshell Pack | Marine Trailer Part

🔧 Product Description

Genuine Mackay Marine Trailer Products Chrome-Plated Trailer Bearing Protectors with Covers – Pair – Part Number: A1305-2

A clamshell-packed pair of chrome-plated bearing protectors supplied with PVC covers. The spring-loaded pistons allow grease to be added at the hub and help limit water ingress during marine launching.

⚙️ Key Features

• Spring-loaded bearing-protector design maintains positive grease pressure
• Helps reduce water entry through the hub seal during launching and retrieval
• Suitable for routine greasing without removing the hub cap
• Supplied as a matched pair for one axle
• Marine-trailer service component

📏 Specifications

• Fitment: Standard trailer hub size matching the 1779/A1305-2 protector body
• Press-fit diameter must match the hub bore exactly
• Grease type must be compatible with the existing hub grease
• Do not over-pressurise the hub or force grease past the rear seal

📋 Supplied Components

• 2 × Bearing protectors
• 2 × PVC protective covers

🔄 Cross Reference & Related Parts

• Dunbier cross reference: 1779
• USA-made premium option: Mackay A1304 / Dunbier 1780
• Replacement protector covers: Mackay A1307-2 / Dunbier 1782

🚤 Compatibility & Application

• Compatible trailer hubs with the exact protector press-fit diameter
• Measure the hub bore rather than relying only on axle size
• Install squarely without striking or distorting the spring piston
• Inspect and service wheel bearings independently; a protector does not repair damaged bearings

🔌 Function

Applies spring pressure to hub grease and provides a convenient external grease point.

⚠️ Common Signs of Failure

• Protector is loose in the hub bore
• Spring piston is seized or will not accept grease
• Grease or water leaks around the protector
• Cover is missing and contamination builds around the piston
• Hub continues to take excessive grease because the rear seal has failed

📦 Condition

• Genuine Mackay Marine Trailer Products part
• Brand new
• Supplied in original or equivalent packaging