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| Illustration 1 | g01244518 |
Location of the power train components (1) Output transfer gears (2) Transmission (3) Transmission planetary (4) Upper drive shaft (5) Updrive transfer gears (6) Torque converter (7) Engine (8) Front final drive (9) Front differential (10) Front drive shaft (11) Front drive shaft support bearing (12) Center drive shaft (13) Rear drive shaft (14) Rear final drive (15) Rear differential | |
Power from diesel engine (7) is sent from the flywheel to torque converter (6). Power from the output shaft of the torque converter is sent to torque converter updrive transfer gears (5) .
Power from the updrive transfer gears is sent through upper drive shaft (4) to the input shaft of transmission (2) .
The transmission output shaft is connected to output transfer gears (1) by splines. Power is sent from the output transfer gears through rear drive shaft (13) to rear differential (15). The output transfer gears also sends power to front differential (9) through center drive shaft (12), center bearing (11), and front drive shaft (10) .
The pinions, bevel gears, and gears of each differential turn the respective axles. The axles are connected to final drives (8) and (14). The final drives turn the wheels.
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| Illustration 2 | g02826097 |
Block diagram of the power train electronic control system (3) Transmission planetary (6) Torque converter (7) Engine (9) Front differential (15) Rear differential (16) Engine Electronic Control Module (ECM) (17) CAT/CAN Data Link (18) Transmission neutralizer switch (19) Transmission direction and speed control (20) ET service connector (21) Machine Electronic Control Module (ECM) (22) Monitoring System (23) Monitoring System service connector (24) Power Train Electronic Control Module (ECM) (25) Parking brake switch (26) Service brake oil pressure sensor (27) Transmission oil pressure sensor (28) Transmission neutralizer override switch (29) Autoshift control switch (30) Start relay (31) Backup alarm (32) Remote/autonomous control brake light (33) Remote/autonomous control switch (34) Parking brake oil pressure sensor (35) Ride control switch (36) Key start switch (37) STIC lockout control limit switch (38) Brake accumulator oil pressure sensor (39) Implement and steering solenoid valve (40) Parking brake solenoid valves (41) Solenoid for lockup clutch (42) Transmission clutch solenoid valves (six) (43) Transmission output speed sensor (44) Key Pad 1 (45) Emergency stop switch (46) Torque converter output speed sensor (47) Torque converter oil temperature sensor (48) Key Pad 2 | |
Six hydraulically activated clutches in the transmission provide four forward speeds and four reverse speeds. Speed selection and direction selection are made manually with transmission direction and speed control (19). The autoshift control will make speed selections if autoshift control switch (29) is in the automatic mode.
The power train electronic control system electronically controls transmission shifts. The power train electronic control system shifts the transmission. For shifting transmission to the desired speed and direction, Power Train Electronic Control Module (ECM) (24) receives input from transmission direction and speed control (19). The Power Train ECM signals the transmission clutch solenoid valve of the speed clutch that is selected. The Power Train ECM signals the transmission clutch solenoid valve of the direction clutch that is selected. The output signal energizes the transmission clutch solenoid valves (42) that are selected. The Power Train ECM can request automatic shifts. The Power Train ECM uses the input signal from transmission output speed sensor (43) to ensure steady engagement of the clutches.
The Power Train ECM controls the following functions: neutral start, manual shift, automatic shift, transmission neutralizer, parking brake, automatic parking brake, operator present, backup alarm and ride control.
The Power Train ECM also controls some of the remote control function.
ReferenceFor information on the remote control refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Remote Control".