A229900009874 Rotary Joint Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A229900009874 Rotary Joint Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

The A229900009874 rotary joint is a precision hydraulic component for excavators, rotary drilling rigs, and other equipment, responsible for connecting the hydraulic circuits for the upper and lower parts of the machine. It can stably deliver hydraulic oil during the machine’s continuous 360° rotation, ensuring smooth coordination of slewing, boom, and stick movements. It is a key assembly for the equipment’s flexible operation and continuous power output.
This product uses a high-strength alloy shell and wear-resistant sealing components, precision-ground and matched for uniform clearance and excellent sealing performance. It rotates smoothly without jamming and with low damping, making it suitable for harsh working conditions such as high-pressure hydraulics, frequent rotation, machine vibration, and dust and mud corrosion. Old joints are prone to seal wear, oil leakage, and rotational jamming, leading to weak rotation, pressure buildup, increased oil temperature, and low operational efficiency. This product is a factory standard specification, allowing for non-destructive replacement of old parts. It is suitable for hydraulic maintenance, overhauls, and bulk stocking, effectively restoring equipment rotation performance and reducing operating costs.

【Core Technical Parameters】

— Product Model: A229900009874
— Product Name: Rotary Joint
— Product Type: Precision Assembly for Original Hydraulic Rotary Connection and Oil Circuit Interconnection of Engineering Machinery
— Compatible Models: Compatible with all Sany tracked construction machinery series; original factory parameters can be replaced without damage.
— Main body material: High-strength alloy shell + wear-resistant sealing components, pressure-resistant, wear-resistant, and prevents pressure leakage.
— Operating conditions: Suitable for wide temperature ranges from -45℃ to +125℃, with stable performance under high, low temperature, and high pressure.
— Structural design: Combined dynamic and static sealing structure, ensuring smooth rotation, no jamming, and excellent sealing performance.
— Protective performance: Multi-layer sealing protection prevents oil leakage, impurities from entering, and stabilizes oil pressure.
— Surface treatment: Precision grinding + rust prevention treatment, making the shell wear-resistant, corrosion-resistant and aging-resistant.
— Working characteristics: 360° free rotation for oil guiding, connecting the oil lines for loading and unloading, ensuring smooth operation.
— Dimensional accuracy: Original factory precision manufacturing process, precise assembly gaps, and zero alignment deviation.
— Installation method: In-situ alignment assembly, no modification required, convenient and efficient disassembly and maintenance.
— Operating condition adaptability: Suitable for high-frequency rotation and high-voltage heavy-load conditions, and resistant to fatigue failure.
— Service life: The sealing components are wear-resistant and stable, and are not prone to leakage or jamming during long-term rotational operation.

The A229900009874 rotary joint is a genuine SANY precision-engineered hydraulic rotary component. It features flexible rotation, tight sealing, and stable high pressure, making it compatible with all SANY tracked construction machinery. It effectively solves problems such as joint oil leakage, rotational jamming, oil circuit pressure escalation, engine stalling, and weak rotation. It stabilizes hydraulic pressure and flow output, improves equipment operation smoothness, reduces oil temperature and oil loss, and minimizes maintenance downtime. It is a high-quality original part for hydraulic system repair, replacement, and bulk procurement.

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