Cause 1: Leakage from the hose connections to the valve.
- Tighten the couplings and the hexagonal nipples. If necessary, replace the sealing washers under the hexagonal nipples.
Cause 2: Leakage from pressure relief valve or damping valve.
- Tighten the nuts, replace nuts and seal washers if necessary.
Cause 3: Leakage from the gaskets between the pressure compensation valve and the control valve body. The oil seeps out between these parts, preferably the lower parts.
- Replace the three O-rings between these details.