Perform the following actions for maintenance and management of the hydraulic system. 1. Keep the working fluid clean (see Chapter 14 HYDRAULIC FLUIDS). 2. Make…

1. Knocking is caused by air in the working fluid. Remove the air from the fluid. 2. Knocking is caused by packing resistance. Apply molybdenum…

1. The pressure falls below the setting level. a. The valve is not properly seated. b. The orifice is clogged with dust. c. Stick-slip is…

1. Spool operation is failed because of dust. Clean the spool and replace the coil. 2. The voltage is too high or low. Set the…

1. Internal leakage in the pump increases. Repair or replace the pump because its volumetric efficiency is deteriorated. 2. Internal leakage in the valve increases.…

1. Suction pipe connection is loose. Fix the connection (screwed part and packing). 2. There are foams in the reservoir. 1. The oil level is…

1. The suction line or the suction filter is clogged. Remove the clogging. 2. The suction line is too narrow or long. Replace the piping…

1. The rotation direction is incorrect. Make sure that the direction is correct. 2. The pump shaft is not rotating. Check and modify the shaft…