SSY007338266 Main pump connection body Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007338266 Main pump connection body Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007338266 is the main pump connector of Sany’s original exclusive material number. It is designed for the connection scenario of the SY1250H mining main pump. This model has a large working load and high main pump output pressure. The connection part needs to withstand the impact of high pressure oil and severe vibration. The strength, sealing and power transmission efficiency of the connector are extremely important. It integrates the core characteristics of high strength pressure-bearing material, precision connection structure, high pressure sealing protection and vibration and deformation resistance. It conforms to national and industry standards such as EN ISO 6162-1 “High Pressure Flange Connection Standard” and GB/T 12459-2017 “Steel Butt Welded Seamless Pipe Fittings” [1][4]. It is matched with 150106010111A double plunger pump set, A210111000321 bolts, A210608000002 O-rings and pump room pipeline. Suitable for open-pit coal mines and metal mines, it can avoid power transmission loss, oil leakage, loose connection and other faults, and is a key original part to ensure continuous and efficient operation of the whole machine in the mine.

Core technical parameters

Model: SSY007338266
Main body material: Forged from 40Cr alloy structural steel and 20# seamless steel pipe in one piece.
Operating temperature: -30℃ to 160℃, suitable for open-pit mines with large day-night temperature differences and high-temperature working environment of main pumps.
Key operating parameters: Compatible main pump interface specifications φ70-φ140mm (fitting the connection dimensions of SY1250H main pump); connecting flange diameter 40-110mm, wall thickness 12-28mm, dimensional tolerance ±0.02mm; flange bolt hole count 4-8, hole spacing tolerance controlled within ±0.1mm; working pressure 25-38MPa, meeting the 35MPa high-pressure scenario requirements of EN ISO 6162-1 standard; interface sealing accuracy ≤0.01mm, power transmission efficiency ≥98%; adopts forging + precision machining process, surface roughness Ra≤0.4μm, service life ≥8000 working hours; pressure resistance test requires holding at 1.5 times the rated pressure (57MPa) for 30 minutes without leakage, meeting the standards for heavy-duty mining main pump connectors.
Structural design: The flange integrated connection structure is adopted, with one end connected to the main pump outlet and the other end connected to the hydraulic pipeline. It has a built-in precision sealing groove, which is compatible with A210608000002 O-rings and adopts an annular groove sealing structure . The flange surface is precision ground and fits tightly. Reinforcing ribs are set in key parts and rounded corner transition design is adopted. The built-in positioning pin ensures accurate connection with the main pump and pipeline, avoids installation deviation, resists vibration and prevents deformation, and is suitable for strong vibration environment in mining.
Shape and Dimensions: Flanged tubular structure, regular shape, free of burrs, cracks, and pores. Dimensions precisely match the SY1250H main pump interface, hydraulic lines, and seals. Length, flange dimensions, and interface specifications are customized according to original factory assembly standards. Precise mounting holes allow for direct replacement with original factory parts, perfectly matching the dimensions of seals, bolts, main pump, and piping.
Surface treatment: Triple treatment including phosphating, high-temperature anti-rust coating, and flange surface polishing; precision grinding of the flange sealing surface; salt spray resistance ≥1000 hours, effectively resisting corrosion from high humidity, high dust, and hydraulic oil in mining environments, preventing rust and scaling, and avoiding loose connections or seal failure due to rust.

Core functions and roles

As the “core hub for power connection” of SY1250H, its core function is to connect the main pump with the hydraulic pipeline and power transmission structure, realize the efficient transmission of power of the main pump and the sealed delivery of high-pressure oil, and at the same time buffer vibration, disperse pressure, and protect the main pump interface and pipeline connection parts from damage [1]. It can avoid power transmission loss, oil leakage leading to a decrease in the efficiency of the main pump and hydraulic system failure, reduce fatigue wear of the main pump and pipeline, extend the service life of core components such as the main pump, pipeline, and seals, reduce operation and maintenance costs, and work together with the main pump, bolts, O-rings and pipelines to form the whole machine power transmission and sealing system. It is a key connecting component to ensure the stable operation of the mining main pump and smooth power transmission.

Applicable Scenarios

Widely used in the main pump connection parts of the SY1250H machine, it is compatible with 150106010111A double plunger pump sets, A210111000321 bolts, A210608000002 O-rings, and pump chamber piping. It serves as the main pump power connection, high-pressure oil sealing and delivery, and vibration buffering. It can also be used with large mining main pumps of the same specifications from Sany Heavy Machinery. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthmoving projects, it is an essential main pump connection accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce power loss and downtime costs caused by seal failure, and improve the operational stability of the main pump.

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