In the hydraulic system, whether it is a metal pipe joint or a hose assembly joint, there is a problem that leakage easily occurs. For the card-type pipe joints, most of them are subjected to large external forces or impact forces, causing the looseness of the ferrule or the deformation of the pipe end surface to cause leakage. At this time, check whether the ferrule is out of round, whether there is a defect in the cutting edge, and whether the pipe end is defective. The integrity and the degree of clamping of the clamping nut, etc., while also eliminating the external force of the pipe. For flared pipe fittings, due to excessive flares, unsatisfactory quality or multiple dismantling, resulting in flaring deformation or cracks, etc., leakage can occur. In this case, the front end can be cut off and re-expanded. If the male and female cone top pressure is used for sealing, the leakage is mostly due to damage on the two taper surfaces, and the conical surface can be ground by using abrasive sand. In some cases where the "о" ring is sealed against the end face or outside diameter.
2 hydraulic hose joint leakage causes

There are several causes for the leakage of hydraulic hose joints: "о"-shaped rings are subject to leakage due to aging or deformation; "о"-shaped rings are not assembled properly, so that when the two planes are connected, the pressure is uneven or the "о"-shaped ring is cut to cause leakage; The о” ring is not compacted, resulting in insufficient leakage due to insufficient elastic deformation; “о” ring is too deep to cause leakage. In this regard, it is necessary to reselect the "O" ring with the same outer diameter and the thicker section, or the sealing plane with the notch groove can be cut or ground to reduce the depth of the stop groove, so that "о" The ring has sufficient elastic deformation (the compression should generally be between 0.35-0.65mm). For leaks at pipe joints using oil-resistant rubber sheets, wool felts, soft steel sheets, combined sealing gaskets or sealants, no matter what the material is, first check whether the seals are damaged, deformed, aged, and the roughness is too large. , and then take appropriate measures.
3 hydraulic hose fittings installation

(1) The hose must not bend excessively when it is moving or at rest, nor can it bend at its root, and it must begin to bend at least 1.5 times its diameter.
(2) The hose must not be pulled too tightly when it is moved to an extreme position and should be relatively loose;
(3) Try to avoid the torsional deformation of the hose;
(4) As far as possible from the heat radiation components hose, the necessary fashion insulation board;
(5) External damage to the hose should be avoided, such as long-term friction on the surface of the same component during use;
(6) If excessive deformation occurs due to the weight of the hose, there shall be support pieces.

The above is how to prevent the leakage of hydraulic hose assembly joints. I hope to help everyone.