Calibrate portable hardness testers quarterly. Yaoshg service teams see this item repeatedly on export lines where PM intervals slip during peak production quarters.
Why this maintenance task matters
Schedule this task on the maintenance calendar with the same priority as production changeovers—deferring it often costs more downtime than the PM itself.
Before starting, lock out drives and verify zero energy state on pneumatic and hydraulic systems. Document machine serial number and hour meter in the PM log.
Procedure for maintenance teams
Follow OEM tolerance tables for wear limits. Photograph abnormal wear and attach to the serial file—useful for warranty and root-cause reviews with application engineering.
After completion, run a short crawl-speed web check where applicable. Confirm no new vibration, heat, or noise before returning to production speed.
If measurements exceed limits or defects return within 48 hours, open a service ticket with Yaoshg and include PM log excerpts rather than repeating adjustments without data.
Quick checklist
- Lock out and tag out drives before mechanical work.
- Record findings in the machine serial log.
- Compare wear to last interval—trend beats one-time inspection.
- Escalate to Yaoshg service if tolerance exceeds OEM limit.