PROBLEM VALVE PROBLEMS Veidekke have experienced problems with the hydraulic valves for the concrete spray rig. The work is often under very demanding conditions. They have changed the oil and valves frequently to try to solve the problems. SOLUTION EF2115d Veidekke decided to try to clean the oil with a mobile system. After one day of treatment the result was so good that the customer decided to install a fixed system directly on the spray r

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