VALVE GP-RELIEF 1067390 - Caterpillar

Illustration 1 g01080173
Flow of Oil and Power in Torque Converter Drive (1) Rotating housing (2) Turbine (3) Impeller (4) Drive gear for the torque converter and transmission scavenge pump (5) Inlet passage for torque converter oil (6) Stator (7) Hub (8) Lockup clutch (9) One-way clutch (10) Outlet passage for torque converter oil (11) Carrier (12) Output shaft (AA) Drive assembly (BB) Driven assembly (CC) Stationary assemblyThe torque converter is made up of an impeller (3), turbine (2), output hub (7), rotating housing (1) and a stator (6) with a one-way clutch (9) and a lockup clutch (8). The converter housing is fastened directly to the flywheel housing. Rotating housing (1) and impeller (3) are fastened together. These components are driven as a unit. The one-way clutch (9) holds the stator (6) in place when the torque converter is used. The one-way clutch (9) also allows the stator (6) to rotate freely when the torque converter is not used. The lockup clutch (8) permits the machine to operate in direct drive in order to keep the power loss at a minimum. Torque Converter Drive
The engine flywheel turns the rotating housing (1) which turns the impeller (3). The impeller (3) directs the oil to the blades of the turbine (2). This will cause the turbine (2) to turn. The turbine (2) directs the oil to the stator (6). This causes the stator (6) to try to turn in the opposite direction of the turbine (2). The movement of the stator (6) causes the rollers of the one-way clutch (9) to roll between the stator (6) and the carrier for the stator (6). The action of the one-way clutch (9) keeps the stator (6) from rotating. The stator (6) now directs most of the oil back to the impeller (3). The remainder of the oil goes out of the torque converter through the outlet passage (10). The oil that goes back to the impeller (3) from the stator (6) moves in the same direction as the rotation of the impeller (3) .The turbine (2) turns the hub (7) and the hub (7) turns the output shaft (12). The power is sent through the output shaft to the front drive shaft and the transfer gears of the transmission.One-Way Clutch
The splines connect the stator (6) to the cam (13). The cam (13) is turned by the stator (6). The carrier (11) does not turn. The