SSY007338265 Main pump connection body Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007338265 Main pump connection body Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007338265 is the main pump connector of the original Sany factory. 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 anti-vibration and anti-deformation. 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” [7]. It is matched with 150106010111A double plunger pump group, A210111000321 bolts, A210608000002 O-ring 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: SSY007338265
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.
Core working parameters: The main pump interface specifications are φ80-φ150mm (fitting the connection size of the SY1250H main pump, the flange diameter is 50-125mm, the wall thickness is 15-30mm, the dimensional tolerance is ±0.02mm, the number of flange bolt holes is 4-8, and the hole spacing tolerance is controlled within ±0.1mm ; the working pressure is 25-40MPa; the interface sealing accuracy is ≤0.01mm, and the power transmission efficiency is ≥98%; the forging + precision machining process is adopted, the surface roughness Ra is ≤0.4μm, and the service life is ≥8000 working hours.
Structural Design: Utilizing a flange-type integrated connection structure, one end connects to the main pump outlet, and the other end connects to the hydraulic pipeline. It features a built-in precision sealing groove to accommodate A210608000002 O-rings, employing an annular groove sealing structure. The flange surface undergoes precision grinding. Key areas are reinforced with rounded corners. An internal locating pin is also included.
Shape and size: It has a flanged tubular structure, and its dimensions are precisely matched with the SY1250H main pump interface, hydraulic pipeline and seals. The length, flange size and interface specifications are customized according to the original factory assembly standards.
Surface treatment: Triple treatment including phosphating, high-temperature anti-rust coating, and flange surface polishing; flange sealing surface undergoes precision grinding; salt spray resistance ≥1000 hours.

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 from 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 [6][7]. 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’s 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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