KIT-REPAIR 8U5852 - Caterpillar

Second Speed Forward
Illustration 3 g01463703
Power Flow in First Speed Forward with the Number 2 Clutch and the Number 5 Clutch Engaged. (3) Number 2 and Number 3 carrier (4) Number 2 clutch (5) Number 2 clutch ring gear (6) Number 2 sun gear (8) Number 3 clutch ring gear (9) Number 3 sun gear (10) Number 4 clutch (11) Number 4 clutch ring gear (12) Number 4 sun gear (15) Number 4 carrier (18) Input shaft (21) Number 2 planetary gears (22) Number 3 planetary gears (23) Number 4 planetary gears (24) Output shaft When the transmission is in second speed forward, Number 4 clutch (10) and Number 2 clutch (4) are engaged. The Number 2 clutch holds ring gear (5) for the Number 2 clutch stationary. The Number 4 clutch holds ring gear (11) for the Number 4 clutch stationary. Input shaft (18) turns Number 2 sun gear (6). Number 2 sun gear turns Number 2 planetary gears (21) .Because ring gear (5) is held stationary by the Number 2 clutch, planetary gears (21) move around the inside of the ring gear. The movement of planetary gears (21) causes Number 2 carrier (3) and Number 3 carrier (3) to turn in the same direction as input shaft (18). As the Number 2 carrier and the Number 3 carrier turn, Number 3 planetary gears (22) turn. The Number 2 planetary gears turn ring gear (8) for the Number 3 clutch and Number 3 sun gear (9). Number 3 sun gear (9) turns output shaft (24). Ring gear (8) turns Number 4 carrier (15) .Because ring gear (11) is held stationary by the Number 4 clutch, planetary gears (23) move around the inside of the ring gear. The movement of planetary gears (23) causes Number 4 sun gear (12) to turn. The Number 4 sun gear turns output shaft (24) .As a result, the torque to output shaft (24) is divided between Number 3 sun gear (9) and Number 4 sun gear (12). From the output shaft, power travels through the output transfer gears to the differentials.Third Speed Forward
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 2 for a typical description of power flow in the forward direction.When the transmission is in third speed forward, Number 3 clutch (7) and Number 2 clutch (4) are engaged. The Number 2 clutch holds ring gear (5) for the Number 2 clutch stationary. The Number 3 clutch holds ring gear (8) for the Number 3 clutch stationary. Input shaft (18) turns Number 2 sun gear (6). Number 2 sun gear turns Number 2 planetary gears (21) .Because ring gear (5) is held stationary by the Number 2 clutch, planetary gears (21) move around the inside of the ring gear. The movement of planetary gears (21) causes Number 2 carrier (3) and Number 3 carrier (3) to turn in the same direction as input shaft (18) .The movement of Number 2 carrier (3) and Number 3