A1578 Mackay 16mm x 36mm x 58mm Steel Bush (Suits Rocka Spring) | Marine Trailer Part

🔧 Product Description

Genuine Mackay Marine Trailer Products Rocka-Spring Steel Pivot Bush 16 × 36 × 58mm – Part Number: A1578

A heavy steel pivot bush for compatible Mackay Rocka load-sharing spring assemblies. It supports the centre or spring pivot bolt and provides a durable replaceable sleeve inside the suspension component.

⚙️ Key Features

• Heavy-duty steel construction
• Designed for Rocka spring suspension
• Supports a 16mm pivot bolt
• Replaceable wear sleeve
• Maintains correct pivot alignment

📏 Specifications

• Inside diameter: 16mm
• Outside diameter: 36mm
• Length: 58mm
• Supply quantity: One bush

🔄 Cross Reference & Related Parts

• Related Rocka centre arm: Mackay A1585G
• Related greaser bolts: Mackay A1572, A1580 and A1590

🚤 Compatibility & Application

• Compatible Mackay Rocka spring eye or rocker-arm bore
• Bush must be a firm square fit without cracking the housing
• Lubricate the pivot in accordance with the suspension design
• Replace the bolt if worn or grooved

🔌 Function

Provides a durable bearing sleeve for the Rocka suspension pivot and keeps the bolt aligned.

⚠️ Common Signs of Failure

• Bush bore is oval or scored
• Bush is loose in the spring or rocker
• Pivot knocks under braking or road shock
• Steel sleeve is cracked or heavily corroded
• Grease cannot reach the bearing surface

📦 Condition

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