2019K Dunbier 4-Leaf Spring Kit | Marine Trailer Part

🔧 Product Description

Dunbier 4-Leaf Slipper Spring Suspension Kit - Part Number: 2019K

A complete display-packaged Dunbier suspension refresh kit for trailers using 4-leaf, 45mm-wide slipper springs. The matched pair of coated springs provides a published combined kit capacity of 1100kg.

⚙️ Key Features

• Complete matched spring replacement kit

• Two 4-leaf, 45mm-wide × approximately 780mm springs

• Dacromet or zinc-flake corrosion-resistant coating

• Square U-bolt mounting hardware

• Includes the principal hardware required for a complete spring replacement

📏 Specifications

• Leaf count: 4 per spring

• Spring width: 45mm

• Spring length: Approximately 780mm

• Published load rating: 1100kg per complete kit

• U-bolt style: square

🔄 Cross Reference & Related Parts

• Dunbier: 2019K

• Mackay: No separate Mackay reference confirmed

• Individual spring: Dunbier 2019

• Kit contents commonly include 2 springs, 4 U-bolts with nuts, 2 fish plates and 2 shackle bolts

• Replacement bushes: Dunbier 2060C/2060D

🚤 Trailer Compatibility & Application

• Suits compatible Dunbier trailers using the specified 45mm slipper spring

• Check U-bolt dimensions against the axle beam before installation

• Kit capacity must not exceed the axle, wheel, tyre or trailer ratings

🔌 Function

Renews both sides of the axle suspension so spring rate, ride height and mounting hardware remain matched.

Common signs of wear or replacement:

• Existing springs are sagged, cracked or mismatched

• U-bolts are stretched or corroded

• Fish plates are bent

• Shackle bolts or bushes are worn

• Trailer ride height and tyre clearance have reduced

🛠️ Installation & Safety

• Support the chassis and axle independently

• Replace both springs and all supplied clamping hardware

• Confirm spring and U-bolt orientation before tightening

• Torque U-bolts evenly in stages

• Recheck suspension hardware after the first loaded trip

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one complete 4-leaf slipper spring kit

• Supplied in original or equivalent packaging