KYB Series Hydraulic Pump for CAT 303CR

KYB Series Hydraulic Pump for CAT 303CR

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

KYB Series Hydraulic Pump for CAT 303CR & CAT 305

Model: PSVL‑42CG, PSVL‑54CG

Product Overview

KYB PSVL‑42CG and PSVL‑54CG are original Japanese load‑sensing variable‑displacement Hydraulic piston pump, serving as the core main hydraulic pump for CAT 303CR and CAT 305 mini excavator Machine. This hydraulic pump provides high‑pressure oil supply for the complete hydraulic system, integrating main pump and built‑in pilot gear pump in one compact assembly. It features LS load‑sensing control and horsepower limiting function, perfectly matching engine power output of small excavators. Widely used for original machine replacement, field overhaul and aftermarket spare‑parts service for construction Machine.

Technical Specifications

- Model: PSVL‑42CG (for CAT 303CR), PSVL‑54CG (for CAT 305)

- Product Category: Hydraulic piston pump, variable displacement main hydraulic pump

- Control mode: LS load‑sensing control + horsepower limiting control

- Integrated component: Built‑in pilot pump

- Max continuous working pressure: 24.5‑28 MPa; peak pressure up to 32 MPa

- Operating speed range: 600‑2200 rpm

- Working medium: Anti‑wear mineral hydraulic oil for hydraulic system

- Working temperature: ‑20℃ ~ +80℃

- Feature: Compact integrated structure, high volumetric efficiency, low noise, anti‑pollution performance, cast‑iron housing, stable load‑sensing response, original mounting dimensions, direct replacement for original Machine

- Applicable equipment: CAT 303CR, CAT 305 mini excavator

Working Principle

As the power source of excavator hydraulic system, engine drives this Hydraulic piston pump to operate. By adopting swash‑plate variable structure, pistons reciprocate to finish oil suction and high‑pressure oil discharge. The LS load‑sensing valve automatically adjusts pump displacement according to load demand of actuators, matching flow output with actual working requirements of the Machine. Built‑in horsepower limiting function prevents engine over‑load stalling. The integrated pilot pump supplies control pressure for multi‑way valve, ensuring sensitive and stable whole hydraulic system operation for digging, lifting and travelling actions.

Core Advantages

1. Original KYB design, specially developed for CAT mini excavator Machine, mounting ports, spline shaft and installation size fully consistent with original hydraulic pump.

2. Advanced LS load‑sensing control reduces power loss and heat generation of the whole hydraulic system, improves fuel‑saving performance.

3. High‑strength cast‑iron body, excellent anti‑vibration and impact‑resistance, adapts to harsh construction‑site working conditions.

4. Integrated main pump plus pilot pump assembly, convenient installation and maintenance for overhaul service.

5. High volumetric efficiency, stable pressure output, effectively avoids common failures such as weak digging force and slow movement of excavator.

Application Range

KYB PSVL‑42CG and PSVL‑54CG Hydraulic piston pump are critical main hydraulic pump for CAT mini‑excavator Machine. It provides driving power for complete hydraulic system. Widely supplied for machinery repair workshops, construction‑site maintenance and global aftermarket spare‑parts business.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor , gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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