CAP 1521601 - Caterpillar

Fourth Speed Forward
When the transmission is in fourth speed forward, the Number 2 clutch and the Number 3 clutch are engaged. The Number 2 clutch holds ring gear (6) for the Number 2 clutch stationary. The Number 3 clutch holds ring gear (9) for the Number 3 clutch stationary. Input shaft (23) turns "Number 2" sun gear (4). The "Number 2 "sun gear turns "Number 2" planetary gears (25).Because ring gear (6) is held stationary by the "Number 2" clutch, planetary gears (25) move around the inside of the ring gear. The movement of planetary gears (25) causes "Number 2" carrier and "Number 3" carrier (7) to turn in the same direction as input shaft (23).Ring gear (9) is held stationary by the Number 3 clutch. With a stationary ring gear, the movement of "Number 2" carrier and "Number 3" carrier (7) causes "Number 3" planetary gears (26) to move around the inside of the ring gear. The "Number 3" planetary gears turn output shaft (22). From the output shaft, power flows through the output transfer gears to the differentials.First Speed Reverse
Illustration 3 g03672107
Power Flow in First Speed Reverse
(1) Coupling
(2) Ring gear for Number 1 clutch
(3) Number 1 clutch
(7) Number 2 and Number 3 carrier
(9) Ring gear for Number 3 clutch
(10) Number 4 carrier
(11) Number 4 sun gear
(13) Ring gear for Number 4 clutch
(16) Number 6 clutch
(17) Ring gear for Number 6 clutch
(18) Number 6 carrier
(19) Number 6 sun gear
(20) Number 1 carrier
(21) Number 1 sun gear
(22) Output shaft
(23) Input gear and shaft
(24) Number 1 planetary gears
(26) Number 3 planetary gears
(27) Number 4 planetary gears
(28) Housing assembly
(29) Number 6 planetary gears When the transmission is in first speed reverse, the Number 1 clutch and the Number 6 clutch are engaged. The Number 1 clutch holds coupling (1) for the Number 1 clutch stationary. The "Number 6" clutch holds ring gear (17) for the Number 6 clutch stationary. Input shaft (23) turns "Number 1" sun gear (4). The "Number 1" sun gear turns "Number 1" planetary gears (24). "Number 1" carrier (20) has a direct mechanical connection with coupling (1).Because coupling (1) is held stationary by the "Number 1" clutch, "Number 1" carrier (20) is also held stationary. The movement of "Number 1" planetary gears (24) causes ring gear (2) to turn in the opposite direction of input shaft (23). Ring gear (2) has a direct mechanical connection with Number 2 carrier and Number 3 carrier (7).As the "Number 2 "carrier and the "Number 3" carrier turn, "Number 3" planetary gears (26) turn. The "Number 3" planetary gears turn ring gear (9) for the "Number 3" clutch and for output shaft (22). Ring gear (9) turns Number 4 carrier (10). As the "Number 4" carrier turns," Number 4" planetary gears (27) turn. The" Number 4" planetary gears turn ring gear (13) for the "Number 4" clutch. The ring gear for the "Number 4" clutch is fastened to housing assembly (28) with splines. The "Number 4" planetary gears also turn "Number