General maintenance methods for hydraulic concrete placing boom out of running
Ⅰ. The hydraulic concrete placing boom arm is out of control
1. The hydraulic safety valve is blocked, solution: clean
2. Internal and external leakage, cylinder seal damage, solution: replace
3. Reverse valve failure, solution: maintenance
4. Electrical failure, solution: maintenance
5. Insufficient oil pressure, solution: inspection and adjustment (completed by professionals)
6. Pressure changes in the pressure limiting valve, solution: inspection and adjustment (completed by professionals)
Ⅱ. The hydraulic concrete placing boom cannot be raised
1. The valve is contaminated or damaged. Solution: clean or replace.
2. The oil pump is contaminated or damaged. Solution: clean or replace.
3. The oil pump does not rotate. Solution: Repair and replace mechanical parts.
4. The reversing valve leaks oil. Solution: replace the seal.
