GASKET 1243912 - Caterpillar

Illustration 1 g00947611
Hydraulic system schematic (1) Transmission oil filter (2) Transmission case (3) Transmission hydraulic controls (4) Torque converter case (5) Inlet line to torque converter (6) Torque converter (7) Flywheel housing (8) Transmission oil pump (9) Outlet line from oil cooler (10) Oil cooler (11) Supply line to oil pump (12) Relief valve for converter outlet (13) Magnetic screen (14) Inlet line to oil coolerThe hydraulic system has a common reservoir. The reservoir is at the bottom of torque converter case (4). The reservoir supplies oil for the operation of the torque converter and the transmission. The reservoir also provides lubrication oil for the different components in the system.Oil is pulled from the reservoir through magnetic screen (13) by transmission oil pump (8). Pump (8) sends pressure oil to transmission oil filter (1). The oil flows through the filter. If restrictions are present in the oil filter, a bypass valve in the filter housing allows the oil to bypass the filter.From filter (1), the oil flows to transmission hydraulic controls (3). The transmission selector and pressure control valve controls the pressure and the flow of oil to the transmission clutches for engagement. The transmission selector and pressure control valve also controls the inlet oil to the torque converter.Inlet oil flows through line (5) for the operation of the torque converter. The ratio valve for the torque converter controls the oil pressure to the converter. Leakage oil from torque converter (6) is used for the lubrication of the internal components.After the components are lubricated, the oil flows to the bottom of transmission case (2). A passage at the bottom of transmission case (2) allows the oil to flow to the bottom of torque converter case (4) .Outlet oil from the converter flows to relief valve (12) for the converter outlet. Relief valve (12) maintains the pressure inside the converter at a minimum of 415 kPa (60 psi). From the outlet relief valve, the oil flows through line (14) to oil cooler (10) .After flowing through the cooler, the oil with a lower temperature flows through outlet line (9) to the transmission planetary group. This oil is for the lubrication of the transmission.