There may be various reasons for the failure of hydraulic pump steering system in construction machinery. Here are some common causes and corresponding countermeasures to address these issues: Insufficient power steering: Cause: This can be caused by low hydraulic pressure or insufficient flow in the steering system. Countermeasures: Check the hydraulic fluid level and make sure it is at the recommended level. Check the hydraulic pump for any damage or wear that could affect its performance. Verify hydraulic filters are clean and not clogged, as dirty filters can restrict flow. Monitor the hydraulic system for any leaks and fix them promptly. If necessary, adjust the relief valve setting to ensure adequate pressure and flow to the steering system. Erratic steering response: Cause: This can be caused by air in the hydraulic system, a faulty steering valve, or a worn pump. Countermeasures: Bleed the hydraulic system to remove any trapped air. Start at the lowest point in the system and work your way up to the highest point. Check the steering valve for any malfunctions such as sticking or improper operation. Repair or replace valve as necessary. Evaluate the hydraulic pump for signs of wear, such as reduced output or excessive noise. If the pump is worn, replace the pump. 90-L-100-MA-5-CD-80-P-3-C7-E-C6-GBA-42-42-24 90L100MA5CD80P3C7EC6GBA424224 90-L-100-MA-5-CD-80-P-3-C7-F-C6-GBA-42-42-24 90L100MA5CD80P3C7FC6GBA424224 90-L-100-MA-5-CD-80-S-3-C7-E-C5-GBA-38-38-24 90L100MA5CD80S3C7EC5GBA383824 90L100-MA-5-CD-80-S-3-C7-F-C6-GBA-42-42-24 90L100MA5CD80S3C7FC6GBA424224 90-L-100-MA-5-CD-80-S-3-C7-F-C6-GBA-42-42-24 90L100MA5CD80S3C7FC6GBA424224 90L100-MA-5-NN-60-S-3-C7-F-C5-GBA-42-42-24 90L100MA5NN60S3C7FC5GBA424224 90-L-100-MA-5-NN-60-S-3-C7-F-C5-GBA-42-42-24 90L100MA5NN60S3C7FC5GBA424224 90L100-MA-5-NN-60-S-3-C7-F-C6-GBA-42-42-30 90L100MA5NN60S3C7FC6GBA424230 90-L-100-MA-5-NN-60-S-3-C7-F-C6-GBA-42-42-30 90L100MA5NN60S3C7FC6GBA424230 90L100-MA-5-NN-80-P-3-C7-E-C5-GBA-42-42-24 90L100MA5NN80P3C7EC5GBA424224 Steering drift or non-centring: Cause: This can be caused by a misaligned steering linkage, worn steering components, or an imbalance in the hydraulic system. Countermeasures: Check the steering linkage and components for any misalignment, loose connections, or excessive play. Adjust or replace affected parts as necessary. Check hydraulic cylinders for leaks or uneven wear. Repair or replace the cylinder if necessary. Balance the hydraulic system by adjusting the neutral position of the steering valve. This helps achieve proper centering and minimizes drift. Excessive steering force: Cause: Faulty or overloaded steering system may cause excessive steering force. Countermeasures: Make sure the hydraulic pump delivers the required pressure and flow to the steering system. Check hydraulic lines for any restrictions or blockages. Check steering components, such as the steering gear or linkage, for excessive friction or wear. Lubricate or replace affected parts as needed. Assess the load on the steering system. If the machine is overloaded, consider redistributing the load or adjusting the equipment configuration. System overheating: Cause: Overheating can be caused by excessive pressure, insufficient cooling, or a malfunctioning heat exchanger. Countermeasures: Use a thermometer or temperature sensor to check hydraulic oil temperature. If it exceeds the recommended range, consider improving the cooling system or using a higher grade hydraulic oil. Check the heat exchanger or radiator for any blockages such as debris or dirt. Clean or repair cooling system if necessary. Make sure the relief valve is set to the correct pressure to prevent excessive heat build-up in the system. Cavitation: Cause: Cavitation occurs when hydraulic fluid evaporates due to low pressure areas within the system, resulting in the formation of air bubbles. This could result in reduced pump performance and possible damage to components. Countermeasures: Check the hydraulic lines for any restrictions or blockages that could cause low pressure areas. Remove any obstructions and ensure proper flow. Verify that the hydraulic fluid level is adequate and that the hydraulic fluid is clean and free of contaminants. Check the pump inlet for any leaks or intake points. Repair or replace any faulty seals or fittings. Adjust pump operating parameters, such as speed or flow, to reduce the possibility of cavitation. Excessive noise or vibration: Cause: Excessive noise and vibration in the hydraulic pump steering system may indicate a mechanical problem or misalignment. Countermeasures: Inspect the pump and related components for any signs of wear, damage or misalignment. Replace or realign as necessary. Check the pump installation and make sure it is securely fastened. A loose or improperly installed pump can cause vibration. Verify that the viscosity and grade of hydraulic fluid is appropriate for the system. Incorrect fluid properties can cause noise and vibration. 90-L-100-MA-5-NN-80-P-3-C7-E-C5-GBA-42-42-24 90L100MA5NN80P3C7EC5GBA424224 90L100-MA-5-NN-80-P-4-C7-F-C5-GBA-29-29-24 90L100MA5NN80P4C7FC5GBA292924 90-L-100-MA-5-NN-80-P-4-C7-F-C5-GBA-29-29-24 90L100MA5NN80P4C7FC5GBA292924 90L100-MA-5-NN-80-S-3-C7-E-C5-GBA-20-20-24 90L100MA5NN80S3C7EC5GBA202024 90-L-100-MA-5-NN-80-S-3-C7-E-C5-GBA-20-20-24 90L100MA5NN80S3C7EC5GBA202024 90-L-100-MA-5-NN-80-S-3-F1-E-C5-GBA-42-42-24 90L100MA5NN80S3F1EC5GBA424224 90-L-100-MS-1-AB-60-P-3-F1-F-03-GBA-35-35-24 90L100MS1AB60P3F1F03GBA353524 90-L-100-MS-1-AB-60-R-3-F1-F-03-GBA-35-35-24 90L100MS1AB60R3F1F03GBA353524 90-L-100-MS-1-BC-60-P-3-F1-F-03-GBA-35-35-24 90L100MS1BC60P3F1F03GBA353524 90-L-100-MS-1-BC-80-L-3-F1-E-02-GBA-35-35-24 90L100MS1BC80L3F1E02GBA353524 pollute: Cause: Contaminants such as dirt, debris or water can enter the hydraulic system and cause damage to the pump and other components. Countermeasures: Implement an appropriate filtration system, including hydraulic filters, to remove contaminants from the fluid. Inspect and replace filters regularly according to the manufacturer's recommendations. Keep your hydraulic system clean and free from external contaminants by implementing good maintenance and operating procedures. Avoid introducing unfiltered fluid into the system during maintenance or repair activities. Regular maintenance and inspection: Countermeasures: Create a routine maintenance schedule for hydraulic pump steering systems, including periodic inspections, fluid checks, and component repairs. Follow the manufacturer's recommended maintenance procedures and intervals. Operators and maintenance personnel are trained in proper system operation, including identifying potential problems and reporting any anomalies. By implementing these cause analyzes and countermeasures, you can effectively resolve and mitigate failures of hydraulic pump steering systems in construction machinery. Regular maintenance, proper operation and prompt attention to any problems will help ensure reliable performance and longevity of your hydraulic system.