A maintenance program for hoses and fittings can reduce equipment downtime and maintain hydraulic system performance. The following are maintenance precautions
1. Depending on the previous history of the equipment, complete maintenance/inspection procedures and the rigor and potential hazards required for use, hose assemblies must be inspected at a regular frequency.
2. Always be careful when inspecting hose assemblies. To reduce the risk of personal injury during system inspections, do not touch components and be aware of potentially hazardous areas near hose assemblies.
Test hoses and fittings as follows:
1. Wire exposed, damaged or corroded.
2. The pipe or joint leaks.
3. Cracked, damaged or corroded joints.
4. Other obvious signs of damage
5. If the above situation occurs, the rubber hose assembly should be replaced immediately.
The hydraulic system should also be tested as follows:
1. Leak port.
2. Pipe clamps, protection or protection system damage or leakage.
3. Too much dust or oil on the components.
4. System fluid condition, fluid temperature, contamination and air entrapment.
Appropriate corrective action should be taken if any of the above is found.
Functional testing should be performed to determine if the system is leak-free and operating correctly.
1. If the hose assembly can be tested and separated from the hydraulic system, further steps can be taken to ensure proper maintenance of the assembly:
2. After the hose assembly is separated, blow it with clean compressed air, or flush it with a compatible clean medium.
3. Detect the cuts, residues and cleanliness of the inner rubber of the hose.
4. Check the straightness of the hose to make sure the hose is not twisted.
5. Make sure the connectors are in good condition and properly crimped or assembled on the assembly.
If the above situation is found, the hose assembly should be replaced.
Hose assemblies shall be hydrostatically tested in accordance with approved test rigs and procedures outlined in SAE J1517. Test for 30 seconds to 1 minute at test pressure or twice the hose working pressure.
When the test pressure is reached, visually inspect the hose for damage or leaks, or body of tubing that indicates loose fittings compared to signs of fitting movement. If there is any condition, the component should be replaced.
Specific seam replacement intervals must be based on early useful life, government and factory recommendations, or damage can result in personal injury or property damage.
Tube storage.
Temperature, humidity, ozone, direct sunlight, oils, solvents, corrosive liquids, insects, rodents and radioactive materials can all pose hazards to hose products and cause them to fail prematurely. The hose should.
Store in a dark and dry environment away from heat sources, electrical equipment and the aforementioned harmful elements. The ideal storage temperature for the hose is +10°C to +20°C, with a maximum of 38°C.
