... 4000 hours.Our floating seal is applicable to various engineering machinery and mining machinery.1. Chinas bulldozer such as ... Japan bulldozer (KOMATSU): D50, D60, D80, D85, D155, D355; American bulldozer (CATERPILLAR): D58, D60, D7G, D8K, D9L, D10H;3. ... Germany hydraulic excavator R902-R992, American CAT hydraulic excavators Japanese Komatsu hydraulic excavators;4. Various loaders ...