China Parts for KOMATASU PC200 Main Pump | Partsdic®

The main pump of the KOMATSU PC200 is a high-pressure, variable displacement axial piston pump.

It is designed to deliver hydraulic fluid at a specific flow rate and pressure to drive the excavator's hydraulic system. The main pump is responsible for powering the boom, arm, and bucket movements, as well as other hydraulic functions of the machine.

The main pump consists of several important parts that work together to generate hydraulic power. These parts include the swash plate, cylinder block, pistons, valve plate, control mechanism, and housing. Let's delve into each of these components and their functions.

The swash plate is a key component of the main pump that converts the rotating motion of the pump's drive shaft into reciprocating motion. This motion is transferred to the pistons, which are housed in the cylinder block. The swash plate angle determines the displacement of the pistons and, consequently, the flow rate of hydraulic fluid.

The cylinder block contains a series of cylinder bores in which the pistons move back and forth. As the swash plate tilts, it causes the pistons to reciprocate, drawing in hydraulic fluid from the suction side and forcing it out through the discharge side.

The valve plate acts as a distribution mechanism, directing the flow of hydraulic fluid to different parts of the hydraulic system. It contains various ports and passages that control the flow direction and pressure.

The control mechanism, usually in the form of a servo piston, regulates the swash plate angle.

By adjusting the swash plate angle, the control mechanism can vary the displacement of the pistons, thereby controlling the flow rate and pressure of the hydraulic fluid.

The housing encloses and supports the main pump's internal components, providing structural integrity and protecting them from external elements.

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