Can hydraulic hoses be tightened while they are under pressure?

Hydraulic hoses should not be tightened while they are under pressure due to several important safety considerations. When hydraulic systems are pressurized, the fluids can exert significant force, which can lead to sudden releases of pressure if fittings are tampered with. This can result in dangerous conditions, including hose bursts or the ejection of components, posing serious risks to both equipment and personnel.

Proper practice dictates that any maintenance or adjustments, including tightening connections, must be performed when the system is depressurized. This ensures that any residual pressure is safely released and helps prevent accidents that can arise from working on pressurized hoses.

This standard is a crucial aspect of hydraulic safety protocols and is integral to the training and operations surrounding the use of hydraulic systems in various applications, including hoisting operations.