HPV050/080/091/102/116/118 Hydraulic Main Pump for Hitachi Excavator EX200-2/3 EX120-2/200-1 EX200-5/6 ZX200-3/EX271HPV080 HPV102 HPV105 HPV118 HPV135 HPV091 HPV091DS HPV091EW HPV091DW HPV116 HPV145

The HPV series hydraulic main pumps are essential components for Hitachi excavators, including models EX200-2/3, EX120-2/200-1, EX200-5/6, ZX200-3, and EX271HPV. These pumps are designed to ensure the smooth operation and high efficiency of the excavators' hydraulic systems. Here are some key points to consider for their maintenance:

1. Regular Inspections: Perform daily checks of the hydraulic system for any leaks, unusual noises, or signs of wear 67.

2. Hydraulic Fluid Levels: Check the oil levels in the power unit tanks daily and ensure there are no changes in temperature or presence of water or dirt in the oil 67.

3. Filter Maintenance: Replace hydraulic filters when their dirt-holding capacity is full but before the bypass valve opens. Continuous monitoring of filter elements can provide valuable insights into the filter's performance and the system's condition 72.

4. Fluid Quality: Monitor the hydraulic fluid's condition; it should be clear or slightly yellowish. Dark, dirty, or milky fluid may indicate contamination or the need for a change 71.

5. Seal Maintenance: Check the condition of the seals to prevent leaks. Replace them as necessary to maintain the pump's efficiency 73.

6. Hose and Connection Inspections: Regularly inspect hydraulic hoses and connections for wear or damage, and ensure they are securely connected 79.

7. Cleaning: Keep the exterior of the pump and all connecting equipment clean to prevent contamination entering the pump 79.

8. Adjustment and Calibration: For models like the Hitachi ZX200-3, follow the manufacturer's guidelines for adjusting hydraulic pump flow, which involves changing the inclination angle of the cylinder 80.

9. Follow Manufacturer's Recommendations: Always refer to the Hitachi maintenance manual for specific instructions related to hydraulic pump maintenance, including fluid type, change intervals, and any special procedures 70.

By adhering to these maintenance tips, you can ensure the longevity and optimal performance of your Hitachi excavator's hydraulic main pump. Regular maintenance not only prevents costly repairs but also contributes to the overall reliability and efficiency of the machine.