Three diagnostic methods of excavator hydraulic system fault
Posted: Nov 21st, '24, 02:43
1. Visual inspection method
For some relatively simple faults, parts can be inspected by eyes, hand molds, ears and smells. For example, visual inspection can find faults such as rupture, oil leakage, looseness and deformation, so that parts can be repaired or replaced in time. Hold the tubing (especially the hose) by hand, when there is pressure oil flow will have a vibration feeling, and there is no oil flow or the pressure is too low.
In addition, hand touch can also be used to determine whether the lubrication of hydraulic components with mechanical transmission components is good, with the hand to feel the temperature change of the component shell, if the component shell is overheated, it indicates poor lubrication; The ear can judge the fault point and degree of damage caused by mechanical parts damage, such as hydraulic pump suction, relief valve opening, component card and other failures will emit such as water impact sound or "water hammer sound" and other abnormal sounds; Some parts will emit odor due to overheating, poor lubrication and corrosion, and the fault point can be determined by smelling.
2. Change the diagnosis method
When there is a lack of diagnostic instruments at the maintenance site or the checked components are relatively sophisticated and should not be disassembled, this method should be used to remove the suspected faulty components first, replace them with new parts or other components that work normally and of the same model on the machine to test, and see whether the fault can be eliminated.
Using the diagnostic method to check the fault, although limited by the structure, on-site component reserve or disassembly inconvenience and other factors, the operation may also be more troublesome, but for such as balance valve, relief valve, check valve and other small size, easy to disassemble components, the use of this method is more convenient. The replacement diagnosis method can avoid the performance reduction of hydraulic components due to blind disassembly. If the above faults are not checked by the replacement method, and the suspected main safety valve is removed directly and disassembled, if the component is not faulty, it may affect its performance after installation.
3, instrument measurement inspection method
The fault point of the hydraulic system is judged by measuring the pressure, flow and oil temperature of the hydraulic oil in each part of the hydraulic system. In the general field detection, the fault of the hydraulic system is often manifested as insufficient pressure, which is easy to detect. The flow detection is more difficult, the size of the flow can only be roughly judged by the speed of the execution of the components. Therefore, in the field testing, more methods are used to detect system pressure.
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For some relatively simple faults, parts can be inspected by eyes, hand molds, ears and smells. For example, visual inspection can find faults such as rupture, oil leakage, looseness and deformation, so that parts can be repaired or replaced in time. Hold the tubing (especially the hose) by hand, when there is pressure oil flow will have a vibration feeling, and there is no oil flow or the pressure is too low.
In addition, hand touch can also be used to determine whether the lubrication of hydraulic components with mechanical transmission components is good, with the hand to feel the temperature change of the component shell, if the component shell is overheated, it indicates poor lubrication; The ear can judge the fault point and degree of damage caused by mechanical parts damage, such as hydraulic pump suction, relief valve opening, component card and other failures will emit such as water impact sound or "water hammer sound" and other abnormal sounds; Some parts will emit odor due to overheating, poor lubrication and corrosion, and the fault point can be determined by smelling.
2. Change the diagnosis method
When there is a lack of diagnostic instruments at the maintenance site or the checked components are relatively sophisticated and should not be disassembled, this method should be used to remove the suspected faulty components first, replace them with new parts or other components that work normally and of the same model on the machine to test, and see whether the fault can be eliminated.
Using the diagnostic method to check the fault, although limited by the structure, on-site component reserve or disassembly inconvenience and other factors, the operation may also be more troublesome, but for such as balance valve, relief valve, check valve and other small size, easy to disassemble components, the use of this method is more convenient. The replacement diagnosis method can avoid the performance reduction of hydraulic components due to blind disassembly. If the above faults are not checked by the replacement method, and the suspected main safety valve is removed directly and disassembled, if the component is not faulty, it may affect its performance after installation.
3, instrument measurement inspection method
The fault point of the hydraulic system is judged by measuring the pressure, flow and oil temperature of the hydraulic oil in each part of the hydraulic system. In the general field detection, the fault of the hydraulic system is often manifested as insufficient pressure, which is easy to detect. The flow detection is more difficult, the size of the flow can only be roughly judged by the speed of the execution of the components. Therefore, in the field testing, more methods are used to detect system pressure.
Choose DIG-DOG for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.dig-dog.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com