YB00001926 Original Excavator Oil Seal for ZX130-6

The original oil seal part number YB00001926 is a specialized skeleton oil seal provided by Hitachi Construction Machinery for the ZX130-6 13 ton hydraulic excavator (with a total working weight of approximately 13 tons). This oil seal is mainly used for sealing key parts such as hydraulic cylinder piston rod, rotary motor shaft seal or walking reducer output shaft seal of equipment, to prevent lubricating oil leakage and block external dust and moisture from entering. Its universal model is usually directly labeled as YB00001926, belonging to the TC type double lip spring skeleton oil seal, which complies with ISO 6194 standard and can be interchanged with NOK, Merkel, SKF and other brands of oil seals of the same size specifications. However, to ensure sealing performance and service life, it is strongly recommended to use genuine original parts from the factory.

This product is an original skeleton oil seal, which is formed by composite vulcanization of high-strength stamped steel skeleton and nitrile rubber (NBR) or fluororubber (FPM). The sealing lip is designed as a main lip+dust-proof secondary lip double lip structure, with a built-in stainless steel self tightening spring to ensure stable contact pressure (radial force ≥ 0.15 MPa) even under shaft eccentricity and vibration conditions. Its working temperature range is -30 ℃ to+120 ℃ (NBR) or -20 ℃ to+200 ℃ (FPM), with a pressure resistance of ≤ 0.05 MPa and a line speed of ≤ 15 m/s. It is suitable for harsh environments with high pressure, high temperature, and high dust in excavators. The size of the oil seal is usually marked as inner diameter x outer diameter x height (such as 40 x 62 x 10 mm), and the specific measurement should be based on the actual object.

Confirm that the surface roughness Ra of the shaft is ≤ 0.4 μ m, without scratches or burrs; Seat hole tolerance H8, chamfer 15 ° -25 °. Lubrication treatment: Apply a small amount of lithium molybdenum disulfide grease (do not use ordinary butter) on the main lip of the oil seal and the surface of the shaft. Installation points: Use specialized installation tools or sleeves to press vertically in, and direct tapping is strictly prohibited; Ensure that the main lip faces the sealed oil side and the dust lip faces outward. Operation monitoring: Check the sealing area for oil leakage and sludge accumulation every 250 working hours; If there are continuous dripping or dust intrusion marks, they need to be replaced immediately. Fault diagnosis: If the lip wears out early, it is often due to excessive surface roughness of the shaft or installation eccentricity; If the rubber hardens or cracks, it is often due to high oil temperature or incompatible oil products.