BRACKET ASSEM. (R.H.) 9D9779 - Caterpillar

Torque Divider Operation
Illustration 3 g03583206
Torque Converter
(1) Flywheel
(2) Ring Gear
(3) Housing
(4) Impeller
(5) Inlet Passage
(6) Carrier
(7) Yoke
(8) Output Shaft
(9) Outlet Passage
(10) Stator
(11) Turbine
(12) Planetary Carrier
(13) Planetary Gears
(14) Sun Gear
(A) Drive Assembly
(B) Driven Assembly
(C) Stationary Assembly The torque converter is driven by the engine through housing (3). The planetary gear group is driven by the engine through sun gear (14). These connections allow the torque output of the engine to go in two separate directions.Because of the larger radius of ring gear (2), most of the torque is sent by the torque converter through the ring gear to planetary gears (13). The remainder of the torque is sent by sun gear (14) to planetary gears (13). Planetary carrier (12), sun gear (14), planetary gears (13), and ring gear (2) turn at the speed of the engine. The planetary carrier (12) has no resistance to rotation.The torque from the torque converter turbine and from the planetary gear group is sent through the planetary carrier to output shaft (8) and to the planetary transmission. When the torque converter and the planetary gear group turn at the same speed, torque from the engine cannot be multiplied. When the machine operates under a load, planetary carrier (12) has a resistance to rotation. Since sun gear (14) turns at the speed of the engine, the resistance to rotation turns planetary gears (13). The rotation is opposite to the rotation of ring gear (2). The opposite rotation of planetary gears (13) decreases the speed of the ring gear.Since turbine (11) is connected to the ring gear, a decrease in speed causes the torque converter to multiply the torque of the engine from housing (3). The torque multiplication is sent to planetary carrier (12) and to the output shaft through the ring gear.As the speed of the ring gear decreases, the torque of the engine is multiplied through sun gear (14) and through the planetary gear group. The torque multiplication is sent to planetary carrier (12) and to the output shaft.When the machine operates under higher load, the resistance to rotation of planetary carrier (12) increases. Then, the speed of the ring gear decreases. The slower speed allows higher torque multiplication through the torque converter turbine and through the sun gear.If the resistance to rotation of the planetary carrier becomes high enough, the ring gear stops. During some very high load conditions, the rotation of the planetary carrier and the rotation of the output shaft also stop. The stopped output shaft causes the ring gear to turn slowly in the opposite direction. The torque multiplication of the torque converter turbine and of the sun gear is at the maximum.Torque Divider Lubrication
Lubrication oil for the torque divider bearings and the planetary gears comes from the supply that is used for the operation of the torque converter. The bearings constantly run in oil. Bearings and gears in the planetary gear group receive lubrication through the flange that connects the turbine (11) to ring gear (2). The pilot bearings receive lubrication through