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With these problems, your hydraulic hose should be replaced.

Edit:Kyotechs Machinery Co.,LtdUpDate:Mar 21, 2018

Failure of the hose at the crack opening

1, the hose rupture at the mouth of the wire curl has a significant necking phenomenon, because the hose is excessive tensile deformation, the separation of each layer, reduce the compressive strength. Excavator parts hose Under high-pressure action will occur length direction of contraction or elongation, the general expansion of the normal state of the +2%~-4%. If the hose is chosen too short during installation, work will be very large tensile effect, serious rupture or loose failure, if the excavator parts hose span is too large, then the hose weight and oil will give hose a larger tensile force, serious will also occur rupture or loose fault.

2, the excavator parts hose rupture torsion, this phenomenon is due to the hose in the installation or use of the process caused by excessive reversal. When the hose is twisted, the reinforcing layer structure changes, weaving, the gap between the winding wires increases, and the compressive strength of the hose is reduced, and the hose is liable to rupture under the high-pressure action.

3, a hose or a number of cracks, cracks neatly occur this phenomenon is mainly due to the system pressure is too high, more than the excavator parts hose pressure capacity.

Second, the hose inner layer failure

1. The inner layer of the hose is seriously deteriorated, and the apparent swelling is due to the excessive time of hydraulic oil usage or the contamination of the contaminated material in the hydraulic system. Excavator parts hose is chemically metamorphic, in the back of the oil will find broken rubber sheet, check the system hydraulic oil hose glue material compatibility and operating temperature is consistent with the standard.

2, the hose inside the glue layer is hard, has the crack, the hose in the high temperature, high pressure work, hose overheating, will make hose plasticizer overflow, overheating hydraulic oil through the system in the oil cylinders, valves and other excavator parts, if a large pressure drop will cause the hydraulic oil decomposition, resulting in the hose inner layer oxidation and hardening, encountered this situation, Should first check the excavator parts hydraulic system operating temperature is normal, valve and throttle hole, high-pressure pump oil suction road is unblocked, in excluding all may cause oil temperature too high and hydraulic oil decomposition factor after the replacement hose.

Third, the hose outside the rubber layer failure

1, the hose is not cracked, but a large number of oil infiltration, at this time the hose did not find a rupture, but a large number of infiltration, the reason is likely to be in the hose through high pressure, the inner layer was eroded, abrasions, until a large area of leakage of steel wire layer caused a large number of

2, excavator parts of the hose outside the serious deterioration of the surface cracks, this is the use of flexible hose long natural aging performance.

3, the hose surface bubble, is due to poor quality hose or improper use, if the drum bubble out of the middle of the hose now, many for the quality of the hose. Timely replacement of the quality of reliable excavator parts, if the hose appears in the joint of the hose, it is likely due to improper installation of joints caused.

4, in the lower temperature area, the hose appearance once cracks, will make the hose is bent, should pay attention to observe whether the hose gum cracks, and decide whether to replace the hose immediately.