A210491000121 Washer Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000121 Washer Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000121 is an original equipment manufacturer (OEM) part number washer specifically designed for the SANY SY1250H 125-ton mining excavator. It integrates high-strength metal substrate, precision stamping, multiple anti-corrosion protections, and resistance to compression deformation, meeting national standards GB97.1 and ISO7090-2000 requirements. It is a key component for bolt connections in core parts such as the SY1250C2C3KH slewing device, SSY008347233 slewing platform, and hydraulic pump/motor end caps. Primarily used in large open-pit coal mines and metal mines for excavation and topsoil stripping operations, it disperses bolt tightening pressure to prevent surface scratches on connected components, fills tiny gaps in the mating surfaces to achieve reliable sealing, prevents bolt loosening under heavy load vibration, oil leakage, and mine dust intrusion, and avoids transmission jamming and component wear. Suitable for mining conditions characterized by high temperature, high dust, strong vibration, and large temperature differences, it is a crucial OEM part for reducing maintenance costs and ensuring operational continuity in mines.

Core technical parameters

Model: A210491000121, SANY SY1250H 125-ton mining excavator dedicated washer
Main body material: Available in 304 stainless steel and Q235 carbon steel to suit different working conditions.
Operating temperature: -30℃ to 150℃; no brittleness or deformation at low temperatures; maintains good structural stability and sealing performance at high temperatures.
Core working parameters: M12–M30 series bolts (corresponding inner diameter and outer diameter are designed according to national standard GB97.1) , thickness specifications 1.0–5.0mm (common specifications: 1.0mm, 1.5mm, 2.0mm, 3.0mm, 5.0mm), dimensional tolerance ±0.02mm, flatness ≤0.03mm; sealing gap ≤0.01mm; compression deformation rate ≤12%, strength grade up to 200HV;
Structural design: It adopts a precision stamping one-piece molding structure with chamfered edges; the surface is flat and smooth.

Core functions and roles

As the “connection protection core” of the Sany SY1250H 125-ton mining excavator, its core function is to disperse the bolt tightening pressure, seal the gap of the connection surface, prevent bolt loosening and oil leakage, protect the bolts and connecting parts from damage, and ensure the firmness and sealing of the connection of each component, which meets the core usage requirements of mining heavy-duty equipment accessories . In large open-pit mines, water conservancy projects and other scenarios, it can not only avoid bolt loosening and connection failure caused by heavy-duty vibration, but also prevent hydraulic oil and coolant leakage, eliminate dust intrusion into the internal parts causing wear and jamming, protect the connection parts of core assemblies such as slewing device, slewing platform, and cab, and extend the service life of the whole machine components; at the same time, its high strength and anti-compression deformation characteristics can adapt to the needs of 24-hour continuous heavy-duty operation, reduce the failure of gaskets, deformation and other faults, and reduce downtime maintenance time.

Applicable Scenarios

Widely used in all bolted connections of the SANY SY1250H 125-ton mining excavator, including the connection between the slewing platform and slewing device, the fixing of the cab and slewing platform, the installation of the counterweight assembly, hydraulic pipeline interfaces, engine peripheral components, and the end cover of the travel gearbox, etc. It is particularly suitable for DN24 specifications and M12–M30 series bolted connection scenarios, and is an essential component for the sealing of the entire machine’s connections. It can also be adapted to corresponding connections and sealing links of other large mining excavators of the same specifications from SANY. It is especially suitable for 24-hour continuous heavy-load 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 basic component for equipment manufacturing, overhaul, upgrading of old machines, and fault repair.

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3. Power System
4. Pipeline
7. Air conditioning system
12 SSY004929649 Bushing 180×160×76
13 SSY004929650 Bushing 180×160×105
14 A820606030364 Sealing Gasket
15 A820101117871 Cover
16 A210491000121 Washer
17 A210111000101 Bolt

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