CAT 303CR Hydraulic Piston Pump with Precision Axial Piston Structure for Direct Replacement and High Volumetric Efficiency

For 566-7021 5667021 Hydraulic Piston Pump CAT 303CR Excavator engine parts

Specification

Description

This hydraulic piston pump is specifically designed for model 566-7021 and compatible with multiple compact excavator models. As a core power component of the equipment’s hydraulic system, it adopts a precision axial piston structure to provide stable and controllable hydraulic power for boom, arm, travel, swing and other movements, ensuring efficient operation of the whole machine. As an original-equivalent quality replacement part, its installation dimensions are fully compatible with the original equipment, enabling direct replacement without additional modification, making it an ideal choice for excavator repair and maintenance.

Advantage

Precise Fit: Custom-designed for corresponding excavator models, with 1:1 matching interfaces, flanges and installation dimensions with the original equipment, ensuring easy installation and zero modification costs.
Reliable Stability: Manufactured with high-strength alloy materials, key components are precision-machined and heat-treated, featuring strong impact and wear resistance, adapting to complex construction site conditions for stable and leak-free long-term operation.
High Efficiency & Energy Saving: Optimized piston and valve plate design ensures high volumetric efficiency and stable flow output, reducing equipment energy consumption and improving working efficiency.
Strict Quality Control: Each product undergoes multiple pressure, leakage and performance tests before delivery, ensuring compliance with original performance standards and reliable service life.

Performance

Structure Type: Axial piston variable pump, which can automatically adjust flow according to load to adapt to different working requirements.
Output Characteristics: Stable pressure and sensitive flow response provide sufficient power for the excavator’s hydraulic actuators, ensuring smooth and precise working movements.
Durability: High-strength housing and precision sealing system can withstand high pressure impact, effectively preventing fluid leakage and extending the service life of the pump.
Compatibility: Compatible with multiple compact excavator models with strong versatility, serving as a high-quality replacement solution for equipment hydraulic system maintenance.

Product sales countries

PACKAGING & SHIPPING

Guangzhou Pinxin Engine Co., Ltd | Premium Diesel Engine Parts Supplier

Guangzhou Pinxin Engine Co., Ltd is a leading manufacturer and supplier of high-quality diesel engine components, specializing in cylinder liners, pistons, engine blocks, crankshafts, fuel injectors, and diesel pumps. As an authorized partner for  Caterpilla (CAT) and Perkins engine parts, we deliver reliable solutions for construction machinery, power generation systems, and heavy-duty engines worldwide.

Comprehensive Product Range

• Cylinder Kits: Premium cylinder liners & pistons compatible with CAT® and Perkins® engines

• Engine Core Components: Durable engine blocks & crankshafts for industrial applications

• Fuel Systems: Precision fuel injectors & diesel pumps with OEM-equivalent performance

• Custom-engineered solutions for excavators, generators, and marine engines

Why Choose Guangzhou Pinxin?

✔ Certified Quality: ISO-certified manufacturing with strict QC protocols
✔ Global Logistics: Fast shipping to 50+ countries via air/sea freight
✔ Technical Support: 15+ years of expertise in engine rebuilds and maintenance
✔ Cost Efficiency: Competitive pricing without compromising durability

Quality Commitment

All components undergo rigorous testing to meet  Caterpilla 1U/2U/3U and Perkins SAA/PHVL specifications, ensuring optimal engine performance and extended service life. Our R&D team continuously innovates to address evolving market demands in the heavy machinery sector.

Serving Global Partners

From construction companies to mining operations and marine engineering projects, we empower industries with reliable engine solutions. Our products are trusted by clients across Southeast Asia, Africa, Europe, and South America.

Contact Us Today

Enhance your engine performance with genuine-quality parts. Request a quote or technical consultation: