MUFFLER 7E3680 - Caterpillar

Illustration 1 g02602681
View of the location of the power train oil filterPower train oil filter (1) is fastened to the left side of the main frame rail.
Illustration 2 g02602696
(1) Power train oil filter (2) Inlet (3) Outlet (4) Bypass switch (5) Pressure test port (6) Oil sampling valveOil from the transmission charge pump section flows to power train oil filter (1) through inlet (2). Power train oil filter (1) has one filter element.During normal operation, the oil flows through the element. The oil flows from the element to outlet (3). The oil that flows through outlet (3) is sent to the transmission hydraulic control. This oil is used to engage the proper clutches in the transmission. Some oil will flow from the transmission hydraulic control to the torque converter. This oil will be used as the hydraulic coupling during torque converter drive. Oil that leaves the torque converter is sent to the power train oil cooler. The oil will flow from the power train oil cooler to the transfer gears and to the transmission for lubrication. The oil that flows through outlet (3) is sent to the modulating valve for the torque converter lockup clutch. This oil is used to engage the torque converter lockup clutch. The filter element stops any debris that is in the oil.If the filter element becomes full of debris, the restriction to the flow of oil causes the pressure to increase. The increase in pressure causes the bypass valve to open. When bypass switch (4) is activated, an alarm will be registered in the cab.The oil then flows past the open bypass valve and to the power train system. When the oil does not flow through the filter element, the debris in the oil will damage the other components in the power train system.Use correct maintenance in order to make sure that the filter element does not become full of debris. If the filter element is full of debris, the flow of clean oil to the power train system is stopped.