Excavator KYB Hydraulic Pilot Pump PSVD2-27E  KYB For Construction Machinery

Pilot Pump Introduction

The PSVD2-27E is a pilot pump designed for the hydraulic systems of mini excavators. Its core is a gear pump structure (specifically, a trochoid type internal gear pump). Its working principle is based on the eccentric rotation of the inner and outer rotors: the drive shaft drives the inner rotor to rotate, and the outer rotor meshes accordingly, forming a periodically changing volume chamber. When the chamber volume increases, negative pressure is generated to draw in hydraulic oil; when the volume decreases, high pressure discharges the oil, thus providing a low-pressure control circuit. An integrated relief valve is also included to maintain system stability. This pump is often used as an integrated component in compound main pumps (such as the PSVD2 series axial piston pumps) for oil replenishment or pilot control.

This pilot pump series is engineered to deliver reliable and precise hydraulic pilot control across a wide range of heavy machinery and industrial applications. The entire lineup features consistent high-quality construction using durable, wear-resistant materials that ensure long service life even in demanding operating conditions. Whether for construction equipment, agricultural machines, material handling systems, or industrial automation, this series provides stable, low-pressure hydraulic signals that enhance overall system responsiveness and operator control precision.

Hebei Runhe Hydraulic is a recognized hydraulic solutions provider with 12+ years of experience. It manufactures hydraulic products for automation, port ships and more, offering customization per customer needs. It upholds quality-first principles and focuses on sustainable development through innovation.

Pilot Pump Parameters

Pilot Pump Advantages

• Compact and lightweight: Fewer parts and shorter overall length, perfectly suited for the cramped engine compartments of 2-8 ton mini excavators, reducing overall weight.
• Low noise and low pressure pulsation: Optimized rotor meshing and flow distribution design provides smooth low-pressure control oil for more comfortable operation.
• High integration: Standard relief valve, no housing drain port, single common suction port internally distributes oil to multiple pump areas, simplifying piping, reducing leak points, and facilitating maintenance.
• High reliability and long lifespan: Mature technology ensures stable pilot/replenishment pressure output under heavy load conditions, offering high durability.
• High efficiency and stability: As an auxiliary component of the main plunger pump, it provides a reliable low-pressure oil source, supports precise hydraulic control, and improves overall machine responsiveness and maneuverability.

FAQ

Q: Can this pilot pump directly replace the original?

A: Yes, the high-quality compatible pilot pump has the same installation dimensions and performance parameters as the original, and can be directly replaced without modifying the piping.

Q: How to maintain the PSVD2-27E pilot pump?

A: Replace the hydraulic oil and filter element regularly (every 500-1000 hours); check the oil level and for leaks; avoid idling or overloading; when the machine is to be shut down for an extended period, rotate it manually to prevent corrosion.

Q: I couldn't find my model. Can I still use it?

A: We recommend providing your excavator's specific model number, a photo of the main pump, or the original pump's nameplate information. We can help you confirm compatibility free of charge.

Package

Normally, it is packaged in cardboard boxes and then shipped on pallets or wooden crates.