Crusher Troubleshooting: Causes & Fixes

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Problems on this page:

Reduced throughput or wrong product size Blockage or bridging Liner wear or tramp metal damage

Reduced throughput or wrong product size

Hits OEE: Performance

Symptoms: Lower output, oversize product, fines out of spec.

Worn liners/jaws or wrong setting

Adjust the closed-side setting; replace worn liners/jaws.

Uneven or choke-feed issue

Maintain correct feed; avoid trickle or surging.

Material harder/wetter than design

Verify feed; adjust the process.

Prevention: Liner/setting management, correct feeding, feed control.

Blockage or bridging

Hits OEE: Availability

Symptoms: Material bridges the inlet, chokes, crusher stalls.

Oversize feed or bridging

Control top size; use a grizzly/scalper upstream.

Wet or sticky material

Manage moisture; clear and prevent build-up.

Discharge blocked

Check the discharge conveyor and chute.

Prevention: Feed-size control, moisture management, discharge checks.

Liner wear or tramp metal damage

Hits OEE: Availability

Symptoms: Rapid liner wear, tramp-metal trips, damage, stops.

Tramp metal in the feed

Add metal detection/magnets; protect with a relief system.

Abrasive material or wrong liner

Use correct liner alloy; plan wear changes.

Overload protection trips

Investigate before reset; clear the cause.

Prevention: Tramp-metal protection, correct liners, overload management.

Crusher troubleshooting FAQ

Crusher: what causes reduced throughput or wrong product size, and how do I fix it?

Symptoms: Lower output, oversize product, fines out of spec. Likely causes: Worn liners/jaws or wrong setting; Uneven or choke-feed issue; Material harder/wetter than design. Fixes: Adjust the closed-side setting; replace worn liners/jaws. Maintain correct feed; avoid trickle or surging. Verify feed; adjust the process. Prevention: Liner/setting management, correct feeding, feed control.

Crusher: what causes blockage or bridging, and how do I fix it?

Symptoms: Material bridges the inlet, chokes, crusher stalls. Likely causes: Oversize feed or bridging; Wet or sticky material; Discharge blocked. Fixes: Control top size; use a grizzly/scalper upstream. Manage moisture; clear and prevent build-up. Check the discharge conveyor and chute. Prevention: Feed-size control, moisture management, discharge checks.

Crusher: what causes liner wear or tramp metal damage, and how do I fix it?

Symptoms: Rapid liner wear, tramp-metal trips, damage, stops. Likely causes: Tramp metal in the feed; Abrasive material or wrong liner; Overload protection trips. Fixes: Add metal detection/magnets; protect with a relief system. Use correct liner alloy; plan wear changes. Investigate before reset; clear the cause. Prevention: Tramp-metal protection, correct liners, overload management.

Guidance only. Always follow lockout/tagout and your site's safe-work procedures, and verify against OEM manuals before acting.

Stop the same fault coming back

Recurring crusher stops usually trace to a cause you cannot see by hand. The partner we recommend is Fabrico: EU-built, so your production data stays in EU jurisdiction, with computer-vision true-cause of micro-stops, a closed loop from PLC-read OEE to an auto-routed work order, and ISO 27001 / 20000-1 / 9001 (supports audit-readiness).

See how Fabrico finds root cause

OEE Lab is built and operated by Fabrico. The directory stays free.

Methods that cut recurring stops: the six big losses · root cause analysis · preventive vs predictive maintenance · TPM · SMED & changeover