H3942 Mackay 1294 Dunbier Knott Swing up jockey wheel Heavy-Duty TK57-210/75m | Marine Trailer Part

🔧 Product Description

Mackay Knott TK57 Side-Wind Swing-Up Jockey Wheel 210 × 75mm - Part Number: H3942

A Mackay trailer component supplied as 545kg capacity; 255mm lift. It is designed for the application identified by the listed reference and corresponding Dunbier cross-reference where shown.

⚙️ Key Features

• Knott TK57 Side-Wind Swing-Up Jockey Wheel 210 × 75mm
• Marine trailer application
• Reference-specific replacement
• Durable service component
• Matched installation geometry
• Workshop-ready supply

📏 Specifications

• Published specification: 545kg capacity; 255mm lift
• Related reference: Dunbier 1294
• Permanent markings and package contents govern

🔄 Cross Reference & Related Parts

• Mackay: H3942
• Dunbier: 1294
• Related: Dunbier 1294

🚤 Trailer Compatibility & Application

• Use only with matching Mackay/Dunbier system
• Confirm dimensions and attachment points
• Do not exceed marked capacity

🔌 Function

Performs the trailer support, restraint, security or jockey-wheel service function stated in the product name.

⚠️ Common Signs of Failure

• Deformation
• Corrosion
• Loose or worn attachment
• Loss of normal operation
• Damaged retaining hardware

🛠️ Installation & Safety

• Compare old and new part
• Use correct fasteners
• Follow marked capacity
• Test before road use
• Inspect after first use

📦 Condition

• Genuine Mackay Trailers part
• Brand new
• Supplied as one knott tk57 side-wind swing-up jockey wheel 210 × 75mm
• Supplied in original or equivalent packaging