A210608000002 O-ring Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210608000002 O-ring Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210608000002 is a Sany original part number O-ring, specifically designed for the hydraulic sealing scenarios of the SY1250H mining excavator. This model operates under heavy loads and high hydraulic system pressures, requiring the sealing parts to withstand high pressure, strong vibrations, and hydraulic oil corrosion. Therefore, the O-ring’s sealing performance, oil resistance, and temperature resistance are extremely demanding. It integrates high-strength, oil-resistant, elastic material, precise dimensional accuracy, a self-tightening sealing structure, and vibration-resistant and extrusion-resistant core characteristics. Suitable for open-pit coal mines and metal mines, it prevents oil leakage, seal failure, and component corrosion, making it a key original part for ensuring continuous and efficient operation of the entire machine in the mine.

Core technical parameters

Model: A210608000002, O-rings exclusive to SY1250H, manufactured using the same source as the original.
Main body material: Available in three materials: HNBR (hydrogenated nitrile butadiene rubber), FKM (fluororubber), and polyurethane (PU).
Operating temperature: -40℃ to 180℃ (different materials are suitable for different temperature ranges), with HNBR version from -30℃ to 150℃, FKM version from -20℃ to 180℃, and polyurethane version from -35℃ to 100℃.
Key operating parameters: Compatible with inner diameters of 5-50mm and wire diameters of 1-5mm (compatible with SY1250H hydraulic seal specifications, conforming to GB/T 3452.1 standard dimensions), dimensional tolerance ±0.01mm; hardness 65-85 Shore A, with the polyurethane version having a hardness of 85±2 Shore A; sealing pressure up to 40MPa, which can be increased to 50MPa when used with a retaining ring; compression set ≤12% (polyurethane version ≤10%), volumetric expansion rate <5% (in hydraulic oil); employs precision molding process, surface roughness Ra≤0.4μm, service life ≥6000 working hours.
Structural design: adopts a standard annular cross-section structure; smooth and burr-free surface; internal reinforcing fibers; edges are rounded for transition.
Shape and size: It has a standard ring structure, and its size is precisely matched with the sealing grooves, bolts and washers of the SY1250H hydraulic components. The inner diameter and wire diameter are customized according to the original factory assembly standards.
Surface treatment: Double treatment with oil-resistant coating and polishing; smooth and clean surface; salt spray resistance ≥800 hours.

Core functions and roles

As the “high-pressure sealing protection core” of the SY1250H, its core function is to fill the sealing gaps at the hydraulic components and pipeline connections through compression deformation and self-tightening sealing action, preventing high-pressure hydraulic oil leakage. Simultaneously, it protects the sealing surface from scratches and buffers the impact of vibration on the sealing area. This avoids insufficient hydraulic system pressure, component corrosion, and environmental pollution caused by oil leakage, extends the service life of core components such as bolts, washers, pump sets, and pipelines, and reduces maintenance costs. Together with bolts, washers, and hydraulic components, it forms the overall machine sealing protection system, making it a key high-pressure sealing component for ensuring the stable and efficient operation of mining hydraulic systems.

Applicable Scenarios

Widely used in the sealing parts of the SY1250H hydraulic system, it is compatible with A210111000321 bolts, A210491000122 high-strength washers for steel structures, 150106010111A double plunger pump sets, and the connection points of pump chamber pipelines. It provides high-pressure sealing, leak prevention, and wear resistance. It can also be used in the sealing of large-scale mining hydraulic systems of the same specifications. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthmoving projects, it is an essential high-pressure sealing accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce oil loss and downtime costs caused by seal failure, and improve the reliability of the hydraulic system.

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1. Pump chamber piping
2. Return oil pipeline
3 SSY009114936 Cooling Pipeline
4. Traveling Pipeline
5 Valve body installation
6-turn pipeline
7. Boom piping
8. Boom and Bucket Piping
9 SSY008119457 Hydraulic oil tank assembly
10 12921534 Sheath
11 12921535 Sheath

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