BLOCK-RUBBER 2987159 - Caterpillar

Illustration 1 g01629983
Oil filter components
(1) Bypass valve
(2) Inlet passage from pump
(3) S O S port
(4) Filter element
(5) Filter housing
(6) Outlet passage Pressure oil from the pump goes into the housing assembly through inlet passage (2). The oil flows through passage (1) in order to fill the space between the inside of filter housing (5) and filter element (4).During normal operation, the oil flows through the filter element and out through passage (6). The oil then travels to the transmission oil cooler. The filter element stops most debris that is in the oil.If the filter element becomes full of debris, the restriction to the flow of oil causes a pressure increase. The increase in pressure will force bypass valve (1) to open. The oil bypasses the filter and flows directly to outlet passage (6).
When the oil does not go through the filter element, the debris in the oil can cause damage to other components in the power train system.
Correct maintenance must be used in order to make sure that the filter element does not become full of debris. A filter element that is clogged with debris will stop the flow of clean oil to the power train system.