RING-RETAINING 3534936 - Caterpillar

Illustration 1 g00814264
Location of Power Train Components (1) Diesel engine (2) Torque converter (3) Transmission (4) Output transfer gears (5) Rear axle (6) Rear drive shaft (7) Front drive shaft (8) Front axlePower from diesel engine (1) is sent from the flywheel to torque converter (2). The torque converter is splined to the engine flywheel. The torque converter is fastened to transmission (3) by bolts. Power flows directly from the torque converter to the transmission input shaft. The torque converter output gear is meshed to the transmission input gear.The transmission output shaft is connected to the input gear in output transfer gear case (4) by splines. Power is sent through the input gear to the output gear. The output gear sends power through rear drive shaft (6) to the rear differential. The output gear also sends power to the front differential through front drive shaft (7). The bevel gear and pinion of each differential sends the power to the final drives through the differentials and through the sun gear shafts. Axle shafts transfer the power from final drives to the wheels. An integral parking brake is mounted on the front of the transmission.Note: The 824H has four forward speeds and four reverse speeds. The 825H has three forward speeds and three reverse speeds. The 826H has two forward speeds and two reverse speeds.
Illustration 2 g00874364
Block Diagram of the Power Train Electronic Control System (9) Transmission neutralizer limit switch (10) Transmission direction and speed control (11) ECAP service connector (12) CAT Data Link (13) Caterpillar Monitoring System (14) Caterpillar Monitoring System service connector (15) Power train electronic control module (ECM) (16) Auto/manual switch for the Autoshift control (17) Transmission neutralizer override switch (18) Minimum engine speed setting (19) Engine (20) Engine speed sensor (21) Torque Converter (22) Torque Converter output speed sensor (23) Modulating valves (transmission clutch) (six) (24) Transmission oil temperature sensor (25) Two Transmission output speed sensors (26) Differential (27) TransmissionSix hydraulically activated clutches in transmission (27) provide four forward speeds and four reverse speeds. Speed selections and direction selections are made manually by using transmission direction and speed control (10). The autoshift control will make speed selections and direction selections if the machine is in automatic mode.Note: The 824H has four forward speeds and four reverse speeds. The 825H has three forward speeds and three reverse speeds. The 826H has two forward speeds and two reverse speeds.The power train electronic control system electronically controls transmission shifts. The power train electronic control system shifts the transmission. In order for the transmission to be shifted to the desired speed and the desired direction, power train ECM (15) receives the operator input from transmission direction and speed control (10). The power train ECM signals the modulating valve (transmission clutch) of the speed clutch that is selected. The power train ECM signals the modulating valve (transmission clutch) of the direction clutch that is selected. The output signal energizes the solenoids of