BELT- 5371427 - Caterpillar

Illustration 1 g01133946
Torque Converter (1) Rotating Housing (2) Stator (4) Outlet Port (5) Output Shaft (6) Inlet Port (7) Carrier (8) Impeller (9) Turbine (A) Drive Components (B) Driven Components (C) Stationary ComponentsThe torque converter connects the engine to the planetary transmission through the main drive shaft. The connection between the engine and the transmission is a hydraulic connection. There is no direct mechanical connection between the engine and the transmission.The torque converter uses oil to multiply the torque to the transmission. When the machine works against a low load, the torque multiplication is low. When the machine works against a high load, the torque multiplication is higher. A higher torque can then be sent to the transmission during high load conditions. During no load conditions, the torque converter does not multiply the torque from the engine.The major components of the torque converter are the rotating housing (1), impeller (8), turbine (9), and stator (2) .Rotating housing (1) is connected to the engine flywheel by splines. Impeller (8) is connected to rotating housing (1). Turbine (9) is connected to output shaft (5). Stator (2) is connected to carrier (7). The stator cannot turn.Oil from the priority valve enters the torque converter through inlet port (6) in carrier (7). Oil is directed to the inlet port by a passage in the hub to impeller (8) .Impeller (8) turns with rotating housing (1) at engine speed.Rotation of rotating housing (1) moves the oil toward the outside of impeller (8). The oil is moved around the inside of the converter housing, and against the blades of turbine (9). The oil that contacts the turbine blades causes turbine (9) and output shaft (5) to turn. This sends torque through the main drive shaft to the input shaft of the transmission.After the oil contacts the turbine blades, the oil goes toward the outside of turbine (9). As the oil goes from the turbine, the oil moves in a direction opposite the direction of the impeller rotation. Stator (2) causes the oil to change direction. The oil then goes back to impeller (8) in the direction of rotation.The force of the oil from the stator can now add to the torque output from the engine to the impeller. This extra force can give an increase to the torque output of the engine to the turbine. A greater difference between the speed of the impeller and the turbine speed causes an increased force of the oil from the stator.The load on the machine changes the speed of the turbine. A higher load causes a larger difference between the speed of the impeller and the turbine speed. The particular load on the machine controls the amount of torque multiplication that can be added by the force of the oil from the stator.Oil from outlet port (4) passes through the torque converter outlet relief valve. The oil then goes to the power train oil cooler.Torque Converter Inlet Relief Valve
Illustration 2 g01109253
Torque Converter Inlet Relief Valve (1) Passage to Torque