2018K Dunbier A1617GK Mackay 9-Leaf Slipper Spring Kit (Zinc Tech) | Marine Trailer Part
2018K Dunbier A1617GK Mackay 9-Leaf Slipper Spring Kit (Zinc Tech) | Marine Trailer Part
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✓ Authorised Volvo Penta Dealer · Marine & auto specialists · Ships Australia-wide
🔧 Product Description
Dunbier 9-Leaf Slipper Spring Suspension Kit – Part Number: 2018K
A complete display-packaged Dunbier suspension refresh kit for trailers using 9-leaf, 45mm-wide slipper springs. The matched pair of coated springs provides a published combined kit capacity of 1800kg.
⚙️ Key Features
- Complete matched spring replacement kit
- Two 9-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: 9 per spring
- Spring width: 45mm
- Spring length: Approximately 780mm
- Published load rating: 1800kg per complete kit
- U-bolt style: square
🔄 Cross Reference & Related Parts
- Dunbier: 2018K
- Mackay: A1617GK
- Individual spring: Dunbier 2018
- 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 Failure
- 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 9-leaf slipper spring kit
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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