I. Basic Information
Service Date: March 30, 2025
Service Location: Customer site in Moscow
Maintenance Project: Troubleshooting and repair of waterjet cutting machine
II. Fault Symptoms and Troubleshooting Process
Fault Symptoms:
The customer reported abnormal working pressure in the high-pressure pump, which affected the normal operation of the waterjet cutting machine.
Troubleshooting Process:
Upon arrival at the site, the service personnel conducted a thorough inspection of the high-pressure pump. During the step-by-step examination of each pump component, multiple parts were found to be damaged or worn to varying degrees. Notably, the piston rods and tie rods showed significant damage, while the installation area of the high-pressure ring in the high-pressure cylinder was heavily worn. The interior of the oil cylinder also exhibited minor scratches. Additionally, all related connectors and instruments were inspected, and a detailed list of parts requiring replacement was confirmed.
III. Repair Plan and Implementation
Parts Replacement and Implementation Plan:
1. Piston Rods (2 pcs): Replaced with new ones to ensure effective power transmission.
2. Tie Rods (4 pcs): Installed new tie rods to secure stable connections between pump components.
3. Tie Rod Nuts (8 pcs): Replaced to ensure proper fastening of the tie rods.
4. Piston Rod Guide Bushings (2 pcs): New guide bushings were used to ensure smooth and stable piston rod movement.
5. Oil Pressure Gauge (1 pc): Replaced to allow accurate monitoring of oil pressure in the pump.
6. End Cap Fixing Screws (4 pcs): Replaced to ensure the end cap is securely fastened.
7. Guide Ring Pads (2 pcs): Replaced to enhance sealing performance.
The engineer used spare parts provided by the customer on-site and supplemented with a personal toolkit. The repair was completed on the same day.
IV. Repair Effect Verification
After the repair, a 3-hour test run of the machine was conducted. The high-pressure pump was confirmed to be running normally, with pressure levels returning to standard and meeting cutting capacity requirements. The customer was also given detailed instructions on equipment maintenance intervals and care recommendations.
V. Case Summary and Recommendations
Summary:
This repair efficiently resolved the damage issue of the high-pressure pump. By accurately identifying the faulty components and replacing key parts, the pump was restored to proper functionality. The successful troubleshooting ensured the effectiveness of the repair process.
Recommendations:
It is advised that the customer performs regular inspections and maintenance of the high-pressure pump to promptly identify and address potential issues, thereby extending the equipment’s service life.
VI. Customer Feedback
"We are very satisfied with the high-pressure pump repair service for our waterjet cutting machine! The engineer conducted a professional and meticulous inspection of the pump, quickly identified the problem, and resolved it efficiently. This kind of professional, responsible, and prompt service gives us great peace of mind!"