What happened to the hydraulic oil leakage on one side of the press brake?

There are several reasons for oil leakage:

1. The valve leaks oil. The valve leaks oil generally because the valve is blocked or damaged. The solution is to replace the valve.

2. The connector is loose. The solution is to tighten the connector or replace the connector.

3. There are problems with the pump and hydraulic oil pipe of the machine.