Fault analysis of hydraulic hose in outer layer     

1) cracks appear on the hose surface

The main reason for the appearance of cracks on the hose surface is that the hose is bent under cold conditions. If the hose surface cracks, attention should be paid to observe the hose rubber cracks, determine whether to replace the hose immediately. Therefore, in cold environment, do not move hose or dismantle hydraulic system, if necessary, should be carried out indoors. If you need to work in a cold environment for a long time, cold resistant hoses should be replaced.

2) bubbling on the outer surface of the hose

The reason for bubbling on the outer surface of hose is the unqualified quality of hose production or improper use at work. If the bubbling occurs in the middle of the hose, the quality of hose production is the most, should be replaced with qualified hose; if the bubble appears in the hose joint, it is likely to cause improper joint installation. Hose connector often detachable, buckle two. Detachable pipe joints made of hexagonal in coat and the joint core, easy disassembly often hose; buckling type pipe joint composed of a joint coat and the joint core to peel outer layer assembly, and then pressed on the special equipment, the hose has certain compression.

3) hose is not broken, but a lot of oil seepage

A large amount of oil seepage is found in the hose, but no rupture is found. The reason is that when the hose passes through the high pressure liquid, the inner rubber is eroded and scraped, until a large area of the steel wire is leaked out, resulting in a large amount of oil seeping. This fault usually occurs at the bend of the pipe, should be checked to replace the hose, and ensure that the bending radius of the hose in use meet the technical requirements.

4) the outer layer of the hose is seriously deteriorated, and the surface is cracked

This is the natural aging of the hose. Due to aging and deterioration, the outer layer is oxidized to cover the surface of a layer of ozone, and with time to thicken, hose in use as long as the slight bending, it will produce tiny cracks. In this case, the hoses should be replaced.