ENGINE AR-CORE 1542358 - Caterpillar

Illustration 1 g00951676
(18) Return filter (24) Hydraulic tank (33) Filter element (34) Return Chamber (35) Tank chamber (36) Suction filter (37) Suction line (38) Port (39) Passage (40) Relief valveThe oil from the return line (38) enters the return chamber (34) that is in the hydraulic tank. The return oil flows through the filter element (33) into the tank chamber (35). The filter element (33) removes the contaminant. The oil in the tank flows through the suction filter (36) and the suction line (37) to the pumps. When the filter element (1) is clogged with the contaminant, the relief valve (40) opens. This allows the return oil to bypass the filter element through the relief valve (40).
Illustration 2 g00951778
(41) Air breatherAir breather (41) is located on the upper surface of the hydraulic tank. The air breather prevents an increase or a decrease of air pressure in the hydraulic tank regardless of the following circumstances :
Change of air pressure in the hydraulic tank due to cylinder movement.
Change of air pressure in the hydraulic tank capacity due to a temperature change.