A820103010415 Cooling oil motor commutator Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A820103010415 Cooling oil motor commutator Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

The A820103010415 cooling oil motor reversing block is a core hydraulic reversing component specifically designed for the cooling systems of Sany construction machinery. Employing an integrated precision structure, it changes the flow direction of the cooling oil to control the forward and reverse rotation of the cooling oil motor, thereby adjusting the oil circulation speed and cooling efficiency of the equipment’s cooling system. It is primarily used to adapt to the cooling oil motors of Sany equipment, compensate for assembly tolerances of cooling system components, ensure smooth cooling oil circulation and stable reversing, and prevent equipment overheating failures caused by oil circuit blockage or reversing jams, thus reducing equipment wear and downtime losses.

Core technical parameters

Model: A820103010415
Material: The main body is made of high-quality ductile iron (QT450-10), which conforms to GB/T 1348-2009 standard; the internal reversing valve core is made of 304 stainless steel; the seals are made of fluororubber (FKM), which has good oil resistance, high temperature resistance and stable sealing performance, and is suitable for cooling oil media scenarios. It can withstand the corrosion of cooling oil for a long time without aging.
Operating temperature: Adaptable to the typical operating environment of Sany construction machinery cooling systems, typically ranging from -20℃ to 130℃.
Operating parameters: Rated working pressure 25MPa, maximum working pressure 30MPa, rated flow rate 50L/min, suitable for the normal pressure and flow requirements of SANY cooling oil motors; reversing response time ≤0.15s, reversing frequency up to 60 times/minute, smooth operation without impact, ensuring continuous and uninterrupted cooling oil circulation; compatible with cooling oil viscosity range of 10~100mm²/s, compatible with SANY equipment-specific cooling oil.
Structural Design: Utilizes an integrated cast structure with a built-in precision reversing valve core, adaptable to cooling oil motor oil circuit connection requirements; flange mounting with a G1/2 internal thread interface, compatible with original factory mounting positions; includes a built-in one-way limit structure.
Shape and size: The overall structure is compact, with a main body length of 120mm, width of 80mm, height of 65mm, mounting hole spacing of 80mm, mounting hole diameter of 10mm, and inlet/outlet diameter of 15mm.
Surface treatment: The main body surface is treated with electrophoretic rust prevention, with a paint film thickness of 0.02~0.04mm; the internal flow channels are precision polished, with a surface roughness Ra≤0.8μm.

Core functions and roles

As the “oil circuit reversing core” of Sany’s construction machinery cooling system, its core function is to precisely switch the flow direction of the cooling oil, control the forward and reverse rotation of the cooling oil motor, and thus regulate the oil circulation speed of the cooling system to ensure timely heat dissipation from core components of the equipment (such as engines and hydraulic pumps). In the cooling systems of Sany construction machinery (such as excavators, cranes, loaders, and concrete pump trucks), it works in conjunction with the cooling oil motor to achieve bidirectional adjustment of the cooling oil circulation, adapting to the cooling needs of the equipment under different operating conditions and preventing power loss, component damage, and other malfunctions caused by overheating. It effectively avoids problems such as reversing jamming, oil leakage, and oil circuit blockage, reduces equipment downtime losses, extends the service life of the cooling system and the overall equipment, and lowers later maintenance costs. It is a key component ensuring the stable operation of Sany equipment’s cooling system.

Applicable Scenarios

Widely used in the core cooling systems of Sany construction machinery, such as the cooling oil motors of Sany SY215 and SY265 series excavators, cranes, loaders, and concrete pump trucks. It is also compatible with Sany equipment cooling pump stations, cooling circuits, and other related hydraulic systems, making it an indispensable core reversing component in equipment manufacturing, overhaul, and precision maintenance. Particularly suitable for harsh operating environments such as construction sites, mines, municipal construction, and oil and gas exploration, it maintains stable performance under high temperature, high humidity, and high dust conditions, ensuring continuous and efficient operation of the equipment cooling system and preventing equipment shutdown due to overheating.

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