4932773480 Original Loader Seal Kit for ZW370-5B

Part number 4932773480 is the original sealing kit provided by Hitachi for the ZW370-5B wheel loader. According to the Hitachi parts system rules, this component is usually also suitable for models in the ZW330-5B, ZW360-5B, ZW390-5B and other equivalent series. As a key sealing component of hydraulic systems or working devices, it may include various sealing elements such as O-rings, oil seals, retaining rings, guide rings, etc., used for sealing hydraulic cylinders, valve blocks, pipelines, and other parts. Its universal number (substitute part number) includes similar models such as 4932773479 and 4932773481, but the use of non-standard spare parts is strictly prohibited to avoid hydraulic system leakage or equipment damage.

This product is a Hitachi pure sealing kit, using high-performance sealing materials such as nitrile rubber (NBR), fluororubber (FKM), polyurethane (PU), etc. The working temperature range is usually -35 ℃ to+110 ℃, and the working pressure can reach 50MPa, suitable for the high vibration, high pressure, and dusty working environment of loaders. Hitachi pure seals have significant advantages in wear resistance, extrusion resistance, and sealing reliability: sealing life>3000 working hours, strong extrusion resistance, and are not easily deformed under high-pressure impact.

Replacement cycle: It is recommended to check every 3000-5000 working hours, or replace it in a timely manner based on hydraulic system leakage, pressure drop, and other fault manifestations. Daily inspection: Check each sealing point of the hydraulic system for leakage and whether the oil is clean every week. Fault manifestation: Failure of the sealing kit may result in hydraulic oil leakage, insufficient system pressure, slow movement, or abnormal noise. Replacement steps: 1 Disconnect the negative terminal of the battery and release the system pressure; 2. Disassemble the relevant hydraulic components and clean the sealing installation surface; 3. Replace the seals in sequence, paying attention to the installation direction; 4. Apply a small amount of clean hydraulic oil to assist in installation; 5. Tighten the bolts to the standard torque and restore the system; 6. Start the device and check for leaks.