PISTON-CLUTCH 1407109 - Caterpillar

oil filter carts are independent filtration carts used to perform kidney loop filtration, also called off board filtration. These carts are powered by air or electric pumps. The oil filter cart draws oil from a component on the machine, passes the oil through a large high efficiency filter on the cart, and returns the oil to the machine. Oil continues to circulate until the oil reaches the target cleanliness for the machine component. This kidney loop (or off board) filtration process is typically performed while other maintenance processes are conducted on the machine.Filtration using the oil filter carts can clean the oil to very high levels of cleanliness. As the machine operates, debris is generated and on-board filtration may not be capable of maintaining the very high level of cleanliness needed for optimal operation and life of a machine component. When kidney loop filtration is repeated during the next maintenance process, the net effect is that the average cleanliness over time is significantly better and the component life is improved.Kidney loop filtration is recommended to clean hydraulic systems or powertrain systems as a regular course of action or after the system has been open to replace a major component such as a pump or cylinder.Cat offers several oil filter cart models that are designed to clean the oil in the final drives, axles, transmissions, hydraulic systems, or other systems. These carts offer high filter capacity at various flow rates that allow efficient off board filtration. Cat offered Oil Filter Carts can also be used to clean oil storage tanks to provide pre-filtration of bulk oils.