Excavator Hydraulic Seal Kit for Komatsu 21W-30-12610 Excavator. Premium quality hydraulic seal repair kit for construction machinery, delivers excellent sealing performance, superior wear resistance, high pressure tolerance and long service life for Komatsu excavator hydraulic systems. Direct OEM replacement, 100% compatible with PC60-6、PC60-6、PC60-6S、PC60-6Z models.