Fault handling measures of hydraulic system of big arm/bucket of 2 cubic scraper in mine

Fault handling measures of hydraulic system of big arm/bucket of 2 cubic scraper in mine

The common faults of the big arm/bucket hydraulic system of the 2-cube scraper in the mine include the lifting cylinder does not move, the lifting cylinder moves too slowly, 

the lifting cylinder fluctuates or shocks, the lifting arm cannot fall, the bucket cylinder does not move, the bucket cylinder moves too slowly, and the bucket cylinder fluctuates

 or shocks when it moves.

The main reason for the non-action of the lifting cylinder is that the oil tank oil level is too low, the oil supply of the oil pump is insufficient, the oil pump does not work, 

can not output pressure oil, the system safety valve pressure regulation is improper or has been damaged, so that the lifting system pressure can not meet the requirements. 

The piston seal of the lifting cylinder is damaged, resulting in large leakage in the cylinder, damage to the external tubing, no oil in the cylinder or insufficient oil, and the 

load in the bucket exceeds the lifting capacity of the cylinder. When dealing with the fault, check the oil tank, if the oil level is too low, the hydraulic oil should be added to 

the specified oil level. Oil pump damaged, repair, repair can not meet the requirements should be replaced. If the pressure of the system safety valve is improperly adjusted, 

adjust the safety valve again and make the system pressure reach 21.0MPa. If the cylinder piston seal is damaged and the pipeline is damaged and leaking oil, replace the 

seal and oil pipe.

The main reasons for the slow operation of the lifting cylinder are insufficient oil supply to the cylinder, damage to the cylinder seal, hydraulic oil leakage, system oil circuit 

obstruction, and poor hydraulic oil flow. Improper adjustment of the system safety valve or the cylinder overload safety valve causes deformation of the boom component, 

no active clearance, lack of lubrication, damage to the hinge pins of the lifting arm, and extrusion friction between the moving parts. When dealing with the fault, check the 

oil