1. Presence of air in the hydraulic system (foam in the tank) 2. Low level of working fluid in the hydraulic tank 3. Oil viscosity does not comply with this Manual 4. Pump is faulty 5. Failure of the hydraulic cylinder piston seal 6. Distributor safety valve is incorrectly adjusted
1. Find and eliminate air leaks 2. Add working fluid. Check the level using the level indicator 3. Replace the oil with the appropriate one for the season 4. Replace the pump 5. Replace the seal 6. Adjust the valve