A820606030364 Sealing Gasket Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A820606030364 Sealing Gasket Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A820606030364 is an original equipment manufacturer (OEM) part number gasket specifically designed for the SANY SY1250H 125-ton mining excavator. It integrates an oil-resistant and high-temperature-resistant base material, a precision-molded structure, a highly elastic sealing surface, and a corrosion-resistant and wear-resistant surface layer. It is a key sealing component for core parts of the SY1250C2C3KH excavator, including the slewing mechanism, hydraulic pump/motor, pipe interfaces, and equipment end caps. Primarily used in large open-pit coal mines and metal mines for excavation and topsoil stripping operations, it fills connection gaps with a highly elastic sealing surface, ensuring reliable sealing of hydraulic oil, coolant, and other media. This prevents leakage that could lead to system pressure drops and component wear, while also preventing the entry of mine dust, moisture, and other impurities into the components, avoiding transmission jamming and seal failure. Suitable for mining conditions characterized by high temperatures, high dust levels, strong vibrations, and large temperature differences, it is a crucial OEM component for reducing maintenance costs and ensuring operational continuity in mines.

Core technical parameters

Model: A820606030364, SANY SY1250H 125-ton mining excavator dedicated sealing gasket
Operating temperature: -40℃ to 180℃; no brittleness or hardening at low temperatures; maintains good elasticity and sealing performance at high temperatures.
Key operating parameters: Thickness specifications 0.8–3.0mm (common specifications: 0.8mm, 1.0mm, 1.5mm, 2.0mm, 3.0mm), dimensional tolerance ±0.01mm, flatness ≤0.02mm, sealing gap ≤0.005mm; Shore hardness 65-75HA, elastic recovery rate ≥90%; excellent oil resistance, after immersion in hydraulic oil for 72 hours, volume change rate ≤5%; suitable working pressure 0-35MPa, service life ≥3000 working hours.
Structural Design: It adopts a composite layer one-piece molding structure, and the sealing surface is precision polished to be smooth and burr-free; the edges are designed with rounded corners; depending on the assembly requirements, it is designed as a flat pad or irregular shape; and it has built-in reinforcing fibers.
Main material: Modified nitrile rubber (NBR) and polytetrafluoroethylene (PTFE) composite material are used to balance elasticity and corrosion resistance. The nitrile rubber layer provides excellent elasticity and fit, while the PTFE surface layer improves wear resistance and oil resistance, which meets the general material standard for sealing gaskets in engineering machinery [3][6][9]. After high-temperature vulcanization treatment, there are no bubbles or cracks, the tensile strength is ≥14MPa, the elongation at break is ≥150%, and the tear resistance and aging resistance are excellent. It can withstand the erosion of hydraulic oil and heavy vibration for a long time without deformation or damage, which is suitable for the extreme sealing conditions in mines and meets environmental protection requirements. It is an ideal substitute for asbestos gaskets [3][6].

Core functions and roles

As the “sealing and protection core” of the SANY SY1250H 125-ton mining excavator, its core function is to fill the gaps between the connecting surfaces, achieving reliable sealing of media such as hydraulic oil and coolant, preventing leakage, and simultaneously isolating impurities such as mining dust and moisture from entering the internal components. This protects the core components of the hydraulic and transmission systems from damage, ensuring the normal operation of all systems. In scenarios such as large open-pit mines and water conservancy projects, it not only avoids system pressure drops and operational jams caused by media leakage, but also prevents wear and corrosion caused by impurities entering the internal components, protecting the core assemblies such as the SY1250C2C3KH slewing device and hydraulic pump/motor, reducing maintenance costs. At the same time, its high elasticity, oil resistance, and high temperature resistance characteristics can adapt to the needs of 24-hour continuous heavy-load operation, reducing seal failures, leakage, and other malfunctions, and minimizing downtime for maintenance.

Applicable Scenarios

Widely used in the hydraulic system, transmission system, and various interface parts of the SANY SY1250H 125-ton mining excavator, including the SY1250C2C3KH slewing device sealing interface, hydraulic pump/motor end cover, pipeline flange, engine peripheral components, and travel gearbox end cover, it is an essential component for the overall machine’s sealing protection. It can also be adapted to corresponding sealing parts of other large mining excavators of the same specifications from SANY. It is particularly suitable for 24-hour continuous heavy-duty operation and harsh working conditions (high dust, strong impact, large temperature difference between day and night, high humidity) in open-pit mines and large-scale earthmoving projects. It is an essential sealing wear part for equipment manufacturing, overhaul, old machine upgrades, and fault repair. At the same time, it is suitable for commercial scenarios such as equipment after-sales maintenance and bulk purchase of spare parts. Its original factory precise compatibility and high reliability can significantly reduce modification costs and downtime, avoid media leakage and component damage caused by gasket failure, and improve the return on investment of projects. It is an indispensable core component in the field of heavy-duty sealing in construction machinery.

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