1.external leakage fault treatment: external leakage is generally visible to the naked eye can be observed. First check whether the tubing is cracked, the pipe joint is loose, whether the seal damage, failure or extrusion; check the joint between cylinder head and cylinder, piston rod and cylinder head guide sleeve there is no leakage phenomenon, check the piston rod Scratches. And in the treatment can be used to tighten the seat bolt, replace the seal, the piston rod pull serious need to re-chromium plating treatment or Replacement.
2.internal leakage fault treatment: due to the leakage in this part is mainly caused by the boom spool valve and the leak in the Cylinder. Internal leakage hidden inside the valve and cylinder, not easy to Check. But we can use some auxiliary methods to judge the leakage Situation. When handling the boom cylinder is checked first, when the piston received the bottom of the boom, the removal of no rod cavity tubing, so that the boom cylinder has a rod cavity continue to fill the Oil. If there is a large number of working oil leaking out of the rod cavity oil port, It indicates that the hydraulic cylinder has internal leakage. Then to check the boom spool valve, the leakage of the boom spool valve is mainly because the valve stem and the valve body with the gap is too large, the pressure regulator Spring damage, valve seal damage or valve body has sand hole.
