Causes of contamination of working fluids and treatment measures

(Summary description)

(Summary description)

Information

Pollutants	Contamination sources and pathways	Measures
Solids (the system must contain the necessary oil filters)	• The assembly is mixed with chips, dirt, welding slag, sand and so on. • Poor pipe seal. • Intrusion from the fuel tank top plate. • Intrusion from the oil filling port. • Pumps, valves and the like are abrasive powder. • The paint is peeling off the inside of the fuel tank.	Acid wash, full rinse. Handling seals should be done with great care. The oil die is airtight except for the vent holes. The oil filter should be used when refueling, and the oil filling port should be plugged firmly with a plug during operation. Periodic inspection of the working fluid, impurities such as more than the prescribed amount to replace. Get the base coat of paint so that the paint inside does not peel off, and care should be taken to prevent peeling when painting.
Rubbery adhesions	• Seals are eroded by working oil. • The paint inside the tank. • Pipe seals. • Oil impurities.	Use seals that are not corroded by working fluids. Paint that is sufficiently resistant to oil should be used. Use a high quality seal and handle the seal correctly. Use non-oxidizing working fluids and replace with new oil if the acid value exceeds the specified amount. Adhesions should be removed by flushing.