Periodic Maintenance and Fault Detection in Hydraulic Systems

Periodic Maintenance and Fault Detection in Hydraulic Systems

If hydraulic systems are not maintained regularly, oil filtration will be insufficient and it will be difficult to control wear. 80% of the malfunctions in hydraulic systems are due to oil contamination. While storing hydraulic oil and other items, it should be noted that the environment is well ventilated, the parts should be covered with a protective material at the appropriate temperature.
Periodic checks;
Maintenance - the control person should have a flow meter and a disassembled manometer in order to have information about the system.

General maintenance - control criteria;
• Tank fluid level
• Visible leaks
• Are the supports tightened, are the parts in place?
• Filter status
• Tank fluid temperature
• Does the system produce an abnormal vibration?
• Tank fluid level check (once a week)
• Control of ventilations (once a week)
• Opening and cleaning the filter(every 6 months, 1000 working hours)
• Hydraulic oil laboratory control (every 6 months, 1000 working hours)
• Changing the hydraulic oil (every 2 years, 4000 operating hours)
• External cleaning (always)

Causes of Fault Troubleshooting
If the Hydraulic System Is Not Working, Possible Reasons Are Below.
Pump not driving
Defective pump driver or reverse rotation direction
No oil in the system
Low oil level in the tank
Too low oil viscosity
dirty filter
Air inlet from the suction line
Worn out pump
Oil leak in pressure line
Setting the safety valve at a low value
Excessive load on the system
Improper hydraulic connection

Causes of Low Pressure in the Hydraulic System
Worn or damaged pump
The viscosity of the oil is too low
Incorrect chiller setting or insufficient chiller capacity
Defective electric motor or coupling
Incorrect pressure setting
Blockage of the pressure relief valve due to contamination
Presence of oil leaks from valves
Worn inner surface of cylinder
Damage to piston seals
Incorrect selection of the piston seal
Internal leakage caused by the decrease in the viscosity of the oil as a result of the small selection of the tank.
Presence of air in oil
Defective safety valve
Accumulator is broken or gas has escaped

Causes of Overheating Pump
Cavitation
Air formation in oil
High setting of safety or relief valve
Overload
Defective pump
hot oil
Decreased amount of fat
Blockage in the suction of the pump
Directional Control Valve Not Working
Valve slider jammed due to contamination
Connecting bolts too tight
The oil is cold
Coil failure or no energy to the coil