A1612 Mackay 2024 Dunbier 7 Leaf Off-Road Spring 60 x 890mm | Marine Trailer Part

🔧 Product Description

Mackay Heavy-Duty Off-Road Eye-to-Eye Spring 60 × 890mm – Part Number: A1612

A heavy-duty 60mm-wide eye-to-eye spring for off-road and rough-road trailer suspension. The supplied product reference identifies the 7-leaf, approximately 890mm version with a 16mm spring-bolt arrangement and an indicative 1550kg rating per pair. Mackay catalogue revisions have also grouped A1612 with an 8-leaf 1300kg off-road spring, so the physical leaf count, free length and permanent rating on the supplied component must be matched before replacement.

⚙️ Key Features

• Heavy-duty eye-to-eye spring design
• 60mm-wide spring pack
• Approximately 890mm nominal length
• Off-road suspension application
• Zinc-Tech/Dacromet-style protective coating
• 16mm spring-bolt application

📏 Specifications

• Mackay part number: A1612
• Dunbier cross reference: 2024
• Supplied listing: 7 leaves, 60mm wide × approximately 890mm
• Supplied listing rating: approximately 1550kg per pair
• Later catalogue reference: 8-leaf off-road spring, 1300kg
• Confirm permanent component markings before installation

🔄 Cross Reference & Related Parts

• Mackay: A1612
• Dunbier: 2024
• Use with eye-to-eye spring hangers and bolts matched to the spring width and bush diameter
• Not interchangeable with 45mm slipper springs or 720mm load-sharing springs

🚤 Trailer Compatibility & Application

• Suitable for trailers specifically designed for the A1612 off-road eye-to-eye spring
• Both spring eyes require supported pivot hangers or shackles
• Replace in matched pairs and preserve the original axle and hanger centres
• Do not select solely from the leaf count because A1612 catalogue specifications have changed

🔌 Function

Supports the axle through two pivoting spring eyes, allowing controlled suspension movement without a sliding slipper tail.

⚠️ Common Signs of Failure

• Spring eyes or bushes are elongated
• Leaves crack, fan out or lose camber
• Trailer tracks unevenly
• Shackle angle becomes abnormal
• Spring contacts the chassis or reaches coil-bind-like full compression
• Corrosion is concentrated around the centre bolt or eye wraps

🛠️ Installation & Safety

• Confirm leaf count, free length, eye centres, bush diameter and marked capacity
• Replace both springs on the axle
• Use new rated spring bolts and locking hardware
• Set shackle geometry to the trailer manufacturer's specification
• Check brake hoses and wiring through full suspension movement
• Recheck fastener torque after initial use

📦 Condition

• Genuine Mackay Trailers part
• Brand new
• Supplied as one heavy-duty off-road eye-to-eye spring
• Supplied in original or equivalent packaging