Volvo EC700B EC460 EC360 Pilot Gear Pump | 14525545 14782798 14602247 | Excavator Main Pump Charge Pump

Chengyuan Hydraulic provides high-performance Pilot Gear Pumps (Charge Pumps) specifically engineered for Volvo large-scale excavator hydraulic systems. This series strictly matches OEM part numbers: 14525545, 14782798, 14602247, 14602252, 14525549, 14541694, and 14671408, fitting heavy-duty models including EC330, EC360, EC460, and EC700B/C.

As the pressure source for the control system, the pilot pump’s performance dictates the sensitivity and precision of the excavator’s movements. Chengyuan ensures 100% Drop-in Interchangeability with the rear mounting interfaces of original K3V/K5V main pumps. Backed by our 100% Simulation Load Testing, every pilot pump is validated for pressure pulsation and flow stability, ensuring reliable control pressure is delivered to the joysticks and multi-way valves even under extreme mining conditions.

Technical Specifications 

• Compatible Brand: Volvo

• Machine Models: EC330B/C, EC360B/C, EC460B/C, EC700B/C

• OEM Part Numbers: 14525545, 14782798, 14602247, 14602252, 14525549, 14541694, 14671408

• Displacement: 10 $cm^3$/rev – 20 $cm^3$/rev (depending on specific model)

• Operating Pressure: 4.0 MPa – 5.0 MPa (40-50 Bar)

• Max Speed: 2500 rpm

• Body Material: High-strength heavy-duty cast iron or die-cast aluminum alloy

• Rotation: Matches main pump (typically Clockwise)

Key Technical Advantages:

• Precision Gear Meshing: Manufactured from high-hardness alloy steel with CNC grinding, ensuring minimal clearance for stable pilot pressure and significantly reduced operational noise.

• Excellent Cold Start Performance: The optimized axial clearance compensation allows the pump to establish pilot pressure rapidly in cold climates with high-viscosity oil, reducing machine warm-up time.

• Wear-Resistant Side Plates: Internal side plates feature special anti-wear alloy coatings to prevent surface scoring from micro-contaminants, maintaining high volumetric efficiency over time.

• Compact & Robust Design: Structured for the narrow installation space at the rear of the main pump, with reinforced bearings to withstand engine-end vibrations.

Application Areas:

• Excavator Pilot Systems: Provides the oil source for joysticks (PPC valves) and foot pedals.

• Clutch & Brake Control: Used in large machinery to manage hydraulic clutch engagement.

• Main Pump Regulation: Supplies initial control pressure for the servo mechanisms of K3V/K5V main pumps.

Expert Maintenance Tips:

• Filter Maintenance: Pilot pump failures are often due to contamination. Always replace the pilot filter according to the service manual. If control response slows down, check the pressure at the pilot pump outlet first.

• Seal Inspection: During installation, inspect the O-ring at the interface with the main pump to prevent air suction or external leaks caused by seal aging.

• Pressure Calibration: After installing a new pump, it is highly recommended to verify the pilot pressure at the test port (typically around 40 Bar) to ensure it stays within the machine’s factory specifications to protect the control valve bank.