BETONPARTSDiagnosis sheet · https://betonparts.com/en/faults/cement-silo/scraping-tube/

Cement silos and screw conveyors · Screw conveyor

Scraping or knocking inside the tube

Symptom: Scraping or knocking inside the tube
Likely cause: Screw sagging, bent shaft, worn hanger, foreign metal or hardened lumps.
Check: String line along the tube; open the hatches.
Fix: Add supports; replace the hanger; clean.

Manual · Book 2 · § 13.6

Parts you may need

⚠ Every look inside, turn by hand or open step means full lockout first. Never enter a silo or a bin with material in it.

Plant / site

Machine and serial no.

Date

Checked by

Findings and actions

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