Introduction
Volvo excavators, as representatives of heavy-duty construction machinery, rely heavily on the stability and performance of their hydraulic systems. The hydraulic system pump, being the core component, is of paramount importance for fault diagnosis and maintenance. This article, based on actual cases from Jiangxi Yongzhen Industrial Technology Co., Ltd., will elaborate on the fault diagnosis methods, maintenance procedures for Volvo hydraulic system pumps, and offer preventive maintenance suggestions and measures.
Fault Diagnosis Methods and Maintenance Cases
Case Study 1: Volvo Excavator Stalling and Shutdown
Fault Phenomenon: The Volvo excavator suddenly stalls and shuts down during operation.
Fault Diagnosis:
Preliminary Inspection: Check the excavator's computer board, solenoid valves, and air filters to ensure no abnormalities.
Hydraulic System Inspection: Examine the engine oil path for blockages, ensure sufficient diesel supply without air ingress, and check the hydraulic oil filter screen for clogging.
Power Matching Check: As stalling is often related to a mismatch between hydraulic pump power and engine power, adjust the hydraulic pump power downwards and observe the excavator's performance. If still abnormal, further inspect the engine fuel supply system.
In-depth Inspection: If the excavator emits black smoke during stalling, confirm that the hydraulic pump power is too high; if not, check the engine fuel supply system for blockages or insufficient fuel pressure.
Maintenance Procedures:
Clean or replace clogged hydraulic oil filter screens.
Clear the engine oil path to ensure sufficient diesel supply and unobstructed flow.
Adjust the hydraulic pump power to match the engine power.
If the engine fuel supply system is faulty, clean or replace relevant components such as fuel lines and filters.
Case Study 2: Reduced Flow and Insufficient Oil Supply in Volvo Excavator Pump
Fault Phenomenon: The Volvo excavator's hydraulic pump experiences reduced flow and insufficient oil supply, resulting in reduced digging force.
Fault Diagnosis:
Suction Pipe Inspection: Check the suction pipe's length, diameter, and bends to assess flow resistance.
Internal Leakage Check: Prolonged pump usage can cause wear to internal parts, increasing internal leakage.
Oil Contamination Check: Inspect the hydraulic oil's contamination level to determine if mating surface wear is caused by oil contamination.
Maintenance Procedures:
Optimize the suction pipe's structure by shortening its length, increasing its diameter, and reducing bends.
Clean or replace worn pump internal parts to restore sealing performance.
Replace contaminated hydraulic oil to ensure system cleanliness.
Regularly check hydraulic oil contamination levels and replace oil filters and hydraulic oil periodically.
Preventive Maintenance Suggestions and Measures
Regular Maintenance: Establish and execute a regular maintenance plan, including checking hydraulic system oil levels, quality, and temperature, cleaning or replacing oil filters, and inspecting and tightening connections.
Use Quality Components: Select original or reliable hydraulic components and accessories to ensure stable system performance.
Proper Operation: Train operators to familiarize them with excavator operating procedures and precautions to avoid equipment damage from improper operation.
Environmental Control: Maintain a clean work environment to reduce dust and impurities entering the hydraulic system.
Monitoring and Early Warning: Install hydraulic system monitoring equipment to real-time monitor hydraulic system pressure, flow, and other parameters, enabling timely detection and resolution of potential faults.
Role of Jiangxi Yongzhen Industrial Technology Co., Ltd.
Jiangxi Yongzhen Industrial Technology Co., Ltd., as a professional construction machinery maintenance service provider, boasts extensive experience in Volvo excavator repairs and advanced maintenance equipment. The company is dedicated to providing high-quality maintenance services, including fault diagnosis, repair, and preventive maintenance for hydraulic system pumps. Through its professional technical team and superior services, it helps customers address various issues with excavator hydraulic system pumps, ensuring efficient and stable equipment operation.
Conclusion
Fault diagnosis and maintenance of Volvo excavator hydraulic system pumps are complex yet crucial tasks. This article aims to enhance readers' understanding of diagnosis methods and maintenance procedures while offering preventive maintenance suggestions and measures. Jiangxi Yongzhen Industrial Technology Co., Ltd. continues to provide outstanding maintenance services, supporting customers in achieving efficient construction and sustainable development.
