In this video, we walk through the complete process of fixing hydraulic oil leaks on a SANY SY210 excavator using the genuine WYS K3V112DT main pump seal kit. You'll see a detailed demonstration of how this Korean-made repair kit provides a perfect fit, eliminates internal leakage issues, and restores your excavator's performance. Learn why choosing authentic WYS seals ensures long-term durability in high-pressure environments and reduces costly machine downtime.