When cleaning the hydraulic valve, pay attention to the following issues：
(1) for the hydraulic valve within the long deposition time, paste solid dirt, clean up do not scratch with the surface.
(2) Pay attention to safety when heating. Some inorganic cleaning fluid is toxic, heating volatilization can be toxic, should be used with caution; organic cleaning fluid is flammable, pay attention to fire prevention.
(3) Select cleaning fluid, pay attention to its corrosive properties, to avoid corrosion of the valve body
(4) After cleaning the parts should pay attention to preservation, to avoid corrosion or re-contamination (5) assembled hydraulic valves should be tested and qualified before being put into use.
