2019 Dunbier Spring 4-Leaf Slipper Dacromet | Marine Trailer Part

🔧 Product Description

Dunbier 4-Leaf Slipper Spring 45mm × 780mm - Part Number: 2019

A Dacromet/zinc-flake coated 4-leaf slipper spring for Dunbier single-axle or tandem slipper-spring suspension. The 45mm-wide, approximately 780mm-long pack is rated to 550kg per spring in the Dunbier catalogue.

⚙️ Key Features

• 4-leaf spring pack

• 45mm spring width

• Approximately 780mm overall length

• Dacromet or zinc-flake corrosion-resistant finish

• Slipper rear end and bushed front eye

📏 Specifications

• Leaf count: 4

• Width: 45mm

• Length: Approximately 780mm

• Published load rating: 550kg per spring

• Use matched springs of equal rating across an axle

🔄 Cross Reference & Related Parts

• Dunbier: 2019

• Mackay: No separate Mackay reference confirmed

• Matching spring kit: Dunbier 2019K

• Standard fish plate: Dunbier 2020

• Shackle bush: Dunbier 2060C/2060D

• Shackle bolt: Dunbier 2070C

🚤 Trailer Compatibility & Application

• Suits Dunbier trailers designed for 45mm-wide, 780mm slipper springs

• Spring capacity must be combined across the axle and remain within axle, tyre and trailer ratings

• Do not mix different leaf counts or arch heights on the same axle

🔌 Function

Supports the trailer chassis, absorbs road shock and allows the rear slipper end to move as the spring flexes.

Common signs of wear or replacement:

• Cracked, separated or shifted leaves

• Spring has flattened or sagged

• Front eye or nylon bush is worn

• Deep corrosion between leaves

• Trailer sits lower on one side

🛠️ Installation & Safety

• Replace springs in axle pairs

• Use new U-bolts and correctly sized fish plates

• Replace worn bushes and shackle bolts

• Tighten U-bolts evenly and recheck after initial use

• Confirm tyre, guard and hull clearance at full load

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one 4-leaf slipper spring

• Supplied in original or equivalent packaging