How to Replace a Cone Crusher Concave (Bowl Liner)

Jul 22, 2025

Standard Operating Procedure

How to Replace Cone Crusher Concave & Mantle

Safely replacing the concave and mantle in your cone crusher is critical to maintaining production efficiency and equipment longevity. Follow this professional step-by-step guide provided by the technical team at Future Green Machinery (FGM).

Cone Crusher Maintenance and Liner Replacement

Preparation & Safety

Consult the Manual: Always start by reviewing the manufacturer’s instructions for your specific cone crusher model.
Wear PPE: Heavy-duty gloves, safety glasses, and hearing protection are mandatory.
Lockout/Tagout (LOTO): De-energize the machine and lock controls to prevent accidental startup.
Declutter the Area: Clear debris and obstacles for safe crane operation and efficient access.

Remove the Old Liners

Remove the feed plate from the top of the assembly.
Loosen or cut off the locking ring/nut (using a torch ring if it’s seized), then unscrew it safely.
Use a certified crane or hoist to carefully lift the mantle off the crusher head.
Chip away old backing materials (e.g., epoxy) from both the head and the concave.
Remove the concave using a lifting device or specialized extraction tool.

Inspect & Prep the Crusher

Surface Inspection: Check for deep wear, structural damage, or debris on the seating surfaces.
Component Inspection: Assess whether the head center or locking nuts also require replacement.
Clean Thoroughly: Ensure all surfaces are wiped clean, dry, and ready to seat the new components.

Install the New Concave & Mantle

Position the new FGM concave correctly inside the upper shell.
Mix the recommended backing material (epoxy) strictly per the manufacturer's guidance.
Pour the backing material between the concave and head, ensuring proper flow to eliminate voids. Let it cure!
Reinstall the mantle and tighten the locking nut to the specified torque.
Reattach the feed plate and reset your automated liner-wear tracking system.

Startup & Monitor

Restart the crusher and recalibrate the Closed-Side Setting (CSS) to ensure the desired product size.
Closely monitor early performance—listen for unusual sounds, observe vibrations, and verify proper feeding drawdown.

💡 Useful Tips at a Glance

Swap as a Pair: Always replace both the mantle and concave simultaneously. Mixing old and new liners disrupts the crushing profile and ruins aggregate shape.
Cure the Epoxy: Always mix and apply the backing material properly and let it cure fully before subjecting the crusher to load.
Track Liner Wear: Benchmarks like a 10% drop in throughput or a remaining liner thickness below ~2.5 cm (1 inch) signal it's time for an immediate replacement.

Need Expert Assistance or Premium Parts?

Get high-performance OEM-equivalent mantles, concaves, and epoxy backing material dispatched globally. Consult our technical support team for seamless change-outs.

CONTACT FGM ENGINEERING

Our Service

Our replacement parts provide durability and reliability equivalent to original equipment manufacturer (OEM) components but at significantly lower prices, tackling the high cost of genuine parts. Benefit from faster delivery and expert remote technical support from our Finland-based team. Choose FG Machinery to minimize downtime, maximize operational efficiency, and keep your mining equipment running at peak performance.

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+8618420105150

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Location Baiyun District, Guangzhou, China

Phone +8618420105150

Email Us info@fgcrusher.com

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