KP0540CPSS KYB KP05 Series Single Gear Pump 4.0cc

Product Overview

The KP0540CPSS belongs to the KYB (Kayaba) KP05 series of single external gear pumps, covering models such as KP0530, KP0535, KP0540, KP0553, KP0560, KP0570 and KP0588. Featuring high-strength materials and precision manufacturing, these compact and lightweight pumps are designed for construction machinery and industrial hydraulic systems. Manufactured to exact KYB original specifications, they offer 100% drop-in interchangeability in mounting dimensions, shaft ends and ports for direct replacement without system modification. Every unit undergoes 100% simulated duty-cycle testing to ensure reliable performance and long service life under high-load and variable operating conditions.

Technical Specifications

• Full Model Codes: KP0540CPSS (and KP0530, KP0535, KP0540, KP0553, KP0560, KP0570, KP0588 etc.)
• Series: KYB KP05 Single Gear Pump
• Nominal Displacement: KP0530 = 3.0 cm³/rev; KP0535 = 3.5 cm³/rev; KP0540 = 4.0 cm³/rev; KP0553 = 5.3 cm³/rev; KP0560 = 6.0 cm³/rev; KP0570 = 7.0 cm³/rev; KP0588 = 8.8 cm³/rev
• Maximum Operating Pressure: 20.6 MPa (smaller sizes); reduced for larger sizes
• Speed Range: 600–3000 rpm
• Control Type: Fixed-displacement external gear
• Approximate Weight: 1.6–1.7 kg
• Mounting: Standard flange (e.g., 4-hole, specific to CPSS configuration)
• Body Material: High-strength aluminum alloy or cast iron (model-dependent)

Key Technical Advantages

• Precision gear machining and optimized tooth profile ensure high volumetric efficiency and low pressure pulsation for smooth, reliable operation.
• Compact and lightweight design facilitates installation in space-constrained construction machinery and equipment while reducing overall machine weight.
• High-strength materials and reliable bearing configuration support medium-to-high pressure duty with strong contamination resistance and long service life.
• Standardized interfaces and shaft ends provide true drop-in interchangeability, simplifying installation and reducing replacement costs.
• Full series subjected to rigorous simulated duty-cycle testing for consistent performance in frequent start-stop and variable-load applications.

Application Areas

Excavators, loaders, road rollers, pavers, drills, bulldozers and other construction machinery hydraulic systems; concrete pump trucks; metallurgical and mining equipment; plastics machinery; marine deck machinery; and various industrial and mobile hydraulic power sources.

Expert Maintenance Tips

Ensure proper flange and shaft alignment during installation; use suitable couplings to avoid additional radial loads. Maintain fluid cleanliness at ISO 4406 19/17/13 or better and use mineral-oil based hydraulic fluid within the recommended viscosity range. Fully bleed the system and confirm adequate suction conditions before initial start-up. Periodically inspect shaft seals and port seals; avoid contaminated or low-viscosity fluids. During cold starts, build speed and pressure gradually to establish proper lubrication. Avoid prolonged operation beyond rated pressure or speed to maximize service life.