What to Look for

• High amp draw: Any increase in amps can signal a potential problem such as the bearings needing replacement or a loose hammer or blow bar moving and dragging on the crusher wall.
• Vibration: Any vibration needs to be checked, and can indicate worn bearings, loose hammers, or rotor wear, meaning the rotor is out of balance.
• Unusual noise: The best person to notice an unusual noise is the daily operator. A howl could indicate worn bearings; screeches, grating, and grinding could mean something is loose.
• High bearing temperature: If the bearing temperature is higher than the preferred range of 140 to 150 degrees F, it may indicate over greasing or worn bearings.
• Uneven wear in the crusher: Material not feeding correctly due to a jam could create uneven wear. Check for foreign material in the crushing chamber such as rebar or wire mesh.

About the author: Jim Schreiner is the marketing manager for Telsmith, Inc. He
can be reached by telephone at 262-242-6600 or via e-mail at
jschreiner@telsmith.com.