A sudden shutdown of a jaw crusher is a serious event. Proper reaction is critical to avoid equipment damage and operator injury.
Immediate Actions
Stop the feed – Shut down all upstream conveyors and feeders immediately.
Execute Lockout/Tagout (LOTO) – Press emergency stop, disconnect main power, and apply personal lock and tag.
Wait for complete stop – Allow all moving parts (flywheels, jaw) to halt before approaching.
Most Common Causes & Solutions
| Cause | Solution |
| 1. Discharge port blockage (most frequent – sticky/wet material or too narrow CSS) | Clear blockage manually with pry bars; pre-screen wet material; adjust CSS. |
| 2. V-belt slippage or breakage | Adjust tension or replace matched belt set. |
| 3. Loose eccentric shaft bushing | Retorque or replace the bushing. |
| 4. Low/unstable voltage Measure voltage | consult electrician to upgrade supply. |
| 5. Bearing seizure (poor lubrication or contamination) | Replace bearings; follow lubrication schedule strictly. |
| 6. Toggle plate/spring failure (motor runs but no crushing) | Replace broken spring, pull rod, or toggle plate. |
Restarting Procedure
Verify chamber is clear and guards are reinstalled.
Remove LOTO and reset emergency stop.
Run no-load for 2–3 minutes – listen for noise, check bearing temperature (max 70°C / 158°F).
Resume feeding gradually, monitoring for 30 minutes.
Luoyang Dahua Heavy Industry is a high-tech enterprise with research & development production, sales, and service. Our company not only guarantees the products quality, but also provides perfect after-sales service. Luoyang Dahua has a professional R & D team, a strong after-sales team, from the equipment selection, site inspection, equipment manufacturing, installation, commissioning, delivery and other aspects for your service. If you have any questions about the machine, please contact the Online Service or by Whatsapp: +86 13938852499.
