What you may notice
Grinding or knocking noise
Incomplete shredding
Shredder stops under load
Motor trips during shredding
Visible jam
Uneven or slow cutting
What you can record safely before service
- Stop additional waste feeding.
- Record the material being processed when the fault occurred.
- Photograph the accessible feed area without reaching inside.
- Keep the machine out of service until the jam cause is understood.
Electrical bypasses, live-panel work and reaching into moving or jammed equipment can create serious risk.
What typically needs deeper checking
Common fault categories
What this service typically covers
Jam diagnosis and inspection for foreign material, overload or damaged cutting parts.
Blade, spacer, shaft, bearing and alignment assessment where applicable.
Motor/gearbox and torque-transfer checks when the drive runs but shredding does not.
Electrical trip diagnosis when a shredder fault is causing overload or protection operation.
Do not wait for a complete shutdown
- The shredder stops under normal feed or jams repeatedly.
- Waste is passing through without being cut to the usual size.
- Grinding, knocking or metallic noise has appeared.
- The motor/gearbox is heating or overload protection trips during shredding.
Quick answers before you book a repair
Why does an OWC shredder keep jamming?
Common categories include unsuitable material, overfeeding, worn or damaged blades, bearing/shaft problems, misalignment and a drive that cannot deliver the required torque.
Can jammed shredder material be removed manually?
Only after proper isolation and by competent personnel using a safe procedure. Reaching into a shredder or rotating assembly without verified isolation can cause serious injury.
Do worn blades always need replacement?
Not automatically. Blade condition, geometry, damage, clearances and the machine design should be checked before deciding whether sharpening, adjustment or replacement is appropriate.