When you need to be sure that you are protecting your hydraulic pump, the only way is to use suction line filter.
By this way, whatever the tank is dirty, the hydraulic pump is protected.
SERIES AS – TS – TSW – ASF
Application : Mount into the side of the reservoir below oil levels, directly mounted to the reservoir vertically (TS-series) or horizontally (TSW-series).
Suction side is in the reservoir when being serviced.
Port size : up to SAE 3 1/2 ” UP TO G 1 1/2
FLOW RATES : up to 700 I/min
Filtration materials : paper , interpor fleece or stainless steel wire mesh.
User benefits : Suction filters which can be serviced from the outside of the reservoir with no additional check valve needed.