B230101000578 O-ring Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B230101000578 O-ring Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B230101000578 is a Sany original part number O-ring, specifically designed for the high-pressure hydraulic sealing scenarios of the SY1250H mining excavator. This model experiences high main pump output pressure and severe operational vibrations, with the sealing components subjected to long-term high-pressure oil impact and media corrosion. This places stringent requirements on the O-ring’s oil resistance, pressure resistance, extrusion resistance, and dimensional accuracy. It integrates high-elasticity, oil-resistant materials, precise dimensional tolerances, a self-tightening sealing structure, and vibration-resistant and extrusion-resistant core characteristics. It conforms to GB/T 3452.1-2005 “O-rings for Hydraulic and Pneumatic Use” and ISO 3601-1 international standards, and is compatible with the SSY007338266 main pump connector, A210204000465 screws, and high-pressure pipeline sealing grooves in the pump room. Suitable for open-pit coal mines and metal mines, it can prevent oil leakage, seal failure, component corrosion, and other malfunctions, making it a key original part number sealing component for ensuring continuous and efficient operation of the entire machine in the mine.

Core technical parameters

Model: B230101000578
Main material: HNBR hydrogenated nitrile butadiene rubber (70 Shore A) is preferred, which is resistant to mineral hydraulic oil, anti-aging, and tear-resistant; FKM fluororubber is optional for high-temperature and highly corrosive working conditions.
Operating temperature: -30℃～150℃ (HNBR), suitable for open-pit mines with large temperature differences between day and night and high-temperature environments in hydraulic systems.
Core dimensions: Inner diameter × wire diameter 34.52mm × 3.53mm (AS568 standard specification); dimensional tolerances: inner diameter ±0.10mm, wire diameter ±0.08mm, conforming to GB/T 3452.1 precision requirements.
Working pressure: Static seal 0～40MPa, up to 50MPa with retaining ring, meeting the high-pressure sealing requirements of SY1250H main pump.
Sealing performance: Compression set ≤12% (100℃×22h), elastic recovery rate ≥92%, no collapse or leakage under long-term pressure.
Process and lifespan: Precision molding, surface roughness Ra≤0.4μm; salt spray resistance≥800 hours, service life≥6000 working hours.
Structural design: Standard circular cross-section, adaptable to rectangular sealing grooves; rounded edges ensure installation without damaging the sealing surface; high-elasticity material combined with groove compression achieves self-tightening sealing, with higher pressure resulting in more reliable sealing.

Core functions and roles

As the core high-pressure sealing component of the SY1250H, its primary function is to fill the sealing gaps at the joints of the main pump connector, pipelines, and valve blocks. It relies on pre-compression and medium pressure to form a bidirectional seal, completely preventing high-pressure oil leakage. Simultaneously, it buffers vibration and impact, protects the sealing surface, and prevents insufficient hydraulic pressure, component corrosion, environmental pollution, and power loss caused by leakage. Together with screws, the main pump connector, and retaining rings, it forms the overall high-pressure sealing system, a crucial sealing component for ensuring hydraulic system stability, reducing maintenance costs, and extending the lifespan of core components.

Applicable Scenarios

Widely used in sealing parts of the SY1250H main pump outlet, high-pressure pipelines, valve blocks, and cylinders, it is compatible with the SSY007338266 main pump connector, A210204000465 screws, and original factory sealing grooves, providing high-pressure sealing, leak prevention, and vibration resistance. It is also compatible with the sealing of large-scale mining hydraulic systems of the same specifications from Sany. Suitable for 24-hour continuous heavy-duty, high-temperature, high-humidity, and high-dust open-pit mines and earthmoving projects, it is an essential original factory sealing accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement, significantly reducing downtime and oil loss costs caused by seal failure.

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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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