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Hydraulic hose assembly is an unrepairable product. There are 14 types of failure modes. Today I will introduce 6 failure modes.
Example 1- Service life
Symptoms: Hydraulic hose burst, steel reinforcement broken and exposed, steel wire slightly tilted in failure area.
Reason: It could be repeated high pressure pulses or repeated winding of the hose in the same place.
Solutions: Replace hose assembly with reference to instruction.
Example 2- Insufficient hose insertion depth
Symptoms: Joint extraction
Reason: The hydraulic hose is not inserted at the recommended depth. All the teeth of the coat must be fastened to the hose. The clamping force of the last tooth of the sleeve is about 25%.
Solutions: Replace hydraulic hose assembly. Mark the outside of the hose according to the recommended value, and then insert the connector body into the mark.
Example 3- Joint clamping diameter error
Symptoms: Leakage in the sleeve and hose and joint pulled out.
Reason: Wrong clamping diameter
Solutions: Replace the hose assembly, refer to the clamping instructions, and select the appropriate tools for correct clamping.
Example 4- The inne rubber layer is broken during assembly
Symptoms: The hydraulic hose attached to the joint has a crack (pinhole or leak) or bubbling of the outer rubber layer. The steel wire was corroded at the bursting point but there was no obvious damage to the surface.
Reason: the inner wall of the hose may be cut or damaged due to lack of necessary lubrication during assembly. Improper assembly leads to moisture entering the interior and corrosion of the steel wire reinforcement layer.
Solutions: Check correct assembly method and replace hydraulic hose assembly.
Example 5- Twisted hose
Symptoms: Hose burst, steel reinforcement broken and exposed, steel wire slightly tilted in failure area.
Reason: It could be repeated high pressure pulses or repeated winding of the hydraulic hose in the same place.
Solutions: Replace hose assembly with reference to instruction.
Example 6- Hose wear
Symptoms: The outer layer is torn or damaged. The reinforcement shows signs of friction or corrosion.
Reason: Excessive friction between hose and other objects. It may also be caused by sharp corners or bracket damage to hose.
Solution: Replace hose assembly. Use a protective sleeve or a soft tube sheath, reinstall the tube if necessary or use a tube clamp to avoid direct contact between the hose and other objects.
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