Contributing 

How do you troubleshoot a hydraulic system?

Leia Doyle

How do you troubleshoot a hydraulic system?

SYSTEM INOPERATIVE

  1. No oil in system, insufficient oil in system. Fill system.
  2. Wrong oil in system. Refer to specifications.
  3. Filter dirty or clogged.
  4. Oil line restriction.
  5. Air leaks in pump suction line.
  6. Worn or dirty pump.
  7. Badly worn components (valves, cylinders, etc.)
  8. Leakage.

What are the common troubleshooting found in hydraulic circuit *?

A: Noise, elevated temperatures and slow or erratic operation are all signs of problems with your hydraulics system. The most common causes of poor hydraulic performance are particulate contamination, water contamination, clogged filters, high fluid temperature and incorrect hydraulic fluids.

How do you troubleshoot a hydraulic pump?

HYDRAULIC PUMP NO-PRESSURE CHECK LIST

  1. CHECK YOUR DIRECTIONAL CONTROL SETTING.
  2. CHECK THAT YOUR PUMP IS RECEIVING FLUID.
  3. CHECK THAT YOUR DRIVE MOTOR IS NOT REVERSED.
  4. CHECK THAT YOUR DRIVE MOTOR IS OPERATING CORRECTLY.
  5. CHECK TO SEE IF YOUR PUMP COUPLING IS DAMAGED.
  6. CHECK YOUR PUMP RELIEF VALVE.
  7. CHECK FOR MECHANICAL DAMAGE.

What are the most common causes of hydraulic system failure?

Air and water contamination are the leading causes of hydraulic failure, accounting for 80 to 90% of hydraulic failures. Faulty pumps, system breaches or temperature issues often cause both types of contamination.

Why is my hydraulic press not working?

Check the fluid level and make sure it is correct, and check for leaks at the pump shaft seal. When you notice more severe problems like cracked frames, electrical problems and insufficient pump pressure, this is when it is time to say goodbye. Make sure you look after your technology and get the most out of it!

How do you get air out of hydraulic lines?

For dissolved air, you can remove it by raising the temperature of the fluid until the air is released. This should only be done if absolutely necessary as hydraulic oil will normally tend to be at least 10% dissolved air.

What does P and T stand for in hydraulics?

Directional control valves are one of the most basic components in any hydraulic circuit. The supply port, which is called the ‘P’ or pressure port, a tank or ‘T’ port which takes the spent fluid back to the hydraulic tank, and a working port, called the ‘A’ port, that delivers the fluid to the load.

What do hydraulic symbols mean?

Hydraulic Circuits Design Symbols Hydraulic symbols provide a clear representation of the function of each hydraulic component. Laying each symbol out on the page in the same sequence the components are used in the circuit allows people to understand the complete function of the hydraulic equipment.

Do you have to bleed air out of hydraulic system?

Air in your hydraulic lines can eventually cause damage to the entire system, so it’s a good idea to bleed the lines once in a while, or if you suspect air was caught.

How are hydraulic pumps used in fault finding?

A hydraulic pump is a positive displacement device (see Chapter 2). This has useful implications when fault-finding. If a pump is working its flow must be getting back to the tank via some route. If it does not the pressure will rise and the oil will eventually go everywhere!

Which is an example of a fault finding system?

A typical example of fault-finding using pressure test points is given in Figure 9.7. Up to time A the system unloads via the solenoid-operated unloading valve V1.

How is the PLC used to fault find?

The PLC also monitors pump action via pressure switch PSI’ which is made whenever the loading valve is energised. A knowledge of the complete system, both electrical and hydraulic, is required to fault-find on this application.

When to start the fault-finding routine of Figure 8.5?

If no recent work has been done, and these quick checks do not locate a fault, it is time to start the fault-finding routine of Figure 8.5. One advantage of pneumatic systems is their natural break into distinct portions: (1) a supply portion up to and including the receiver and (2) one or more application portions after the receiver.