Maintenance and Repair Recommendations for Hydraulic Circuits

Maintenance and repair recommendations for hydraulic circuits, topic contents:

Points to Pay Attention to in Hydraulic Circuit Maintenance and Repair

Procedures Required for General Maintenance

General maintenance requires a maintenance program, the necessary tools and equipment, and well-trained technical personnel. The personnel must know the working principles of hydraulic circuit components, have the ability to inspect and check them, be skilled at troubleshooting, and be able to solve problems that arise.

A good maintenance and repair program should be established for preventive maintenance. For this purpose, records should be kept properly, circuit components that need to be closely monitored in advance should be identified, these components should be checked continuously, the system should be kept clean, and small repairs should be made on time to prevent major failures that could occur later, avoiding unnecessary loss of money and time.

Tools Required for Maintenance

The most important aids in maintaining hydraulic circuits are the relevant component’s catalogs, manuals, drawings, data sheets, parts lists, and similar documents explaining how the system works.

There should be a test bench for repairing pumps, cylinders, and control components (valves), and repaired components should be tested on this test unit. Directly installing and testing a newly repaired component in its place on a machine in serial production at the factory can produce dangerous results.

Maintenance requires precision measuring instruments, pressure gauges, flow meters, hand tools, a clean work area, and other tools and wrenches. A good spare parts stock should be maintained to shorten maintenance and repair time.

Sealing elements, roller bearings, spare hydraulic oil, spare filters, hoses, fittings, pipes, and any parts recommended to be kept as spares in the machine’s catalog should be kept ready. Searching for materials and spare parts at an unexpected moment will cause the operation significant loss of time and money.

Records

Establishing a good record-keeping system for hydraulic circuit components reduces the time and duration of maintenance and repair. These records are generally kept on a card.

The model number of the relevant components, their operating speeds, and the address and phone numbers of the manufacturer or its representatives are written on these cards. The maintenance and repair card also records points that stood out during previous maintenance, when and how a procedure was performed and where, which part was replaced and why. The card notes the important points of the relevant component or machine that need to be checked, and periodic maintenance times are written on it. The properties of the oils and when they were added, when they’ll be changed, the properties of the filters used and when they’ll be cleaned, and possible faults that could occur in the machine and its components are recorded on these cards.

Paying Attention to Safety Rules

As always, “safety first.” Paying attention to occupational safety rules in maintenance and repair work is necessary and essential.
See the following for detailed articles on this topic:

General Safety Rules for Hydraulic Technicians

Safety Rules for Those Working on Hydraulic and Pneumatic Machines

Recommendations for Filter Maintenance

• Prepare and follow a filter maintenance program. Check the filter element removed from the system and investigate the cause of its deterioration.
• Do not reuse oil that has leaked out of the hydraulic system.
• Pay attention to cleanliness when removing and installing components.
• Take the necessary precautions to prevent foreign matter and dust from entering the oil reservoir from outside.
• Check whether the properties of the oil used in the circuit match the values specified by the manufacturer. When it’s time to replace the filter, replace it right away. If it’s a filter that can be cleaned and reused, clean it and use it again.

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