Introduction: A leakage symptom prompting investigation
Hydraulic cylinders play a critical role in industrial processes, ensuring precision and reliability of movement. However, a leak from a VICKERS 02-322621 hydraulic cylinder can result in loss of production efficiency, repair costs and equipment hazards. In the case of a cylinder leak, a gasket leak was detected, necessitating a root cause determination.
Component overview: function, location, operating conditions
VICKERS 02-322621 hydraulic cylinder is used in lifting and moving systems. It is located in a vertical position, where it handles loads weighing up to 5000 kg. The working pressure of the system is 150 bar, and the temperature of the working medium is allowed in the range of 30–80 °C according to the EN 12999. standard
Signs of a defect: what the technician sees
During the inspection, a leak was found from the cylinder manifold, consistent with the symptoms of a gasket leak. The pressure in the system was measured at the level of 148 bar, which corresponds to the permissible range. Vibration measurements showed a value of 5.2 mm/s, which is beyond the permissible limit of 3.5 mm/s according to the ISO 10816-3. standard. The absence of fluid tracking in the system during operation indicates a leak during static mode.
Root cause research: a systematic review
The 5 Whys method and the Ishikawa scheme were used to determine the root cause. The first stage of the analysis showed that the leak was caused by a gasket leak. The second stage indicated a possible gasket failure. The third stage revealed the absence of a filter in the system, leading to contamination. The fourth stage showed that vibration can lead to mechanical peeling of the gasket. The fifth stage indicated incorrect installation of the cylinder, causing the deviation.
The root causes are identified
- Contamination (probability 65%) – the absence of a filter in the system leads to contamination of the gasket.
- Declination (25% chance) – incorrect installation of the cylinder results in a deviation.
- Pressure peaks (probability 10%) – higher pressure values in the system can cause a leak.
Shock measures: immediate solution + long-term prevention
Contamination: Immediately install a filter in the system and perform cleaning. Long-term installation of a filter with purity class ISO 4406:20/18/15.
Deviation: Check cylinder installation and count. Long-term use of measuring devices to control the reading.
Pressure peaks: Install a pressure regulator and perform a system check. Long-term use of pressure sensors for monitoring.
Quick diagnostic check: 12 points for the technician in the work environment
- Check for leakage from the cylinder.
- Measure the pressure in the system.
- Measure the vibration of the cylinder.
- Check the installation of the cylinder.
- Check the system filter.
- Check the temperature of the working fluid.
- Check for contamination.
- Count the cylinder.
- Check the pressure regulator.
- Measure the liquid.
- Check for leaks.
- Calculate the working fluid.
- Check filter installation.
- Perform pressure measurement.
Prevention strategy: maintenance intervals, condition monitoring, design improvement
To prevent leakage, it is recommended to carry out maintenance every 5000 hours of operation. Use vibration and pressure sensors to monitor system health. Improve system design by adding filters and pressure regulators.
Conclusion: Refer to the UNITEC-D E-Catalog for parts replacement and preventative maintenance
A VICKERS 02-322621 hydraulic cylinder leak can have several root causes, including contamination, deviations, and pressure peaks. Carrying out a systematic analysis and taking recommended actions will ensure the reliability of the system. For replacement and prevention use UNITEC-D E-Catalog.
List of references
- EN 12999:2003 - Permissible temperatures for hydraulic systems
- ISO 10816-3:2009 - Vibration requirements for industrial equipment
- ISO 4406:2011 - Purity classes for hydraulic fluids
- Requirements for maintenance of hydraulic systems according to DSTU 4378:2019
- Manual VICKERS 02-322621 - Technical documentation
