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| Illustration 1 | g03671549 |
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Transmission Components (1) Ring gear for Number 1 clutch (2) Ring gear (3) Number 1 clutch (4) Number 2 sun gear (5) Number 2 clutch (6) Ring gear for Number 2 clutch (7) Number 2 and Number 3 carrier (8) Number 3 clutch (9) Ring gear for Number 3 clutch (10) Number 4 carrier (11) Number 4 sun gear (12) Number 4 clutch (13) Ring gear for Number 4 clutch (14) Number 5 clutch (15) Rotating hub (splined to rotate with sun gear (11)) (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 (25) Number 2 planetary gears (26) Number 3 planetary gears (27) Number 4 planetary gears (28) Housing assembly (29) Number 6 planetary gears | |
The transmission has six hydraulically activated clutches which provide four forward speeds and four reverse speeds.
Note: The 826K has no clutch 4 (third gear).
Standard is joystick steering with FNR and up/down switches integrated.
Optional is EH steering wheel with stalker shifter (FNR and up/downshift)
The transmission is located between the torque converter housing and the output transfer gear case. Input power to the transmission flows from the torque converter through the transmission input gear.
A speed clutch and a direction clutch must be engaged in order for power to be sent through the transmission. The speed clutch engages before the direction clutch. Table 1 lists the solenoids that are engaged for each forward speed and for each reverse speed.
| Transmission Clutch Modulating Valve Logic | |
| Speed Range and Direction | Transmission Clutch
Modulating Valves Energized(1) (Direction and Speed) |
| Fourth Speed Forward | 2 and 3 |
| Third Speed Forward | 2 and 4(2) |
| Second Speed Forward | 2 and 5 |
| First Speed Forward | 2 and 6 |
| Neutral | None and 3 |
| First Speed Reverse | 1 and 6 |
| Second Speed Reverse | 1 and 5 |
| Third Speed Reverse | 1 and 4(2) |
| Fourth Speed Reverse | 1 and 3 |
| (1) | The clutches in the transmission that are engaged are the same as the listed solenoid valves that are energized. |
| (2) | The 826K machine does not have a clutch 4 (third speed) |
The Number 1 clutch and the Number 2 clutch are nearest to the input end of the transmission. The Number 1 clutch is the reverse direction clutch. The Number 2 clutch is the forward direction clutch.
The Number 3 clutch, Number 4 clutch, Number 5 clutch, and Number 6 clutch are the speed clutches. The Number 3 clutch provides fourth speed. The Number 4 clutch provides third speed. The Number 5 clutch provides second speed. The Number 6 clutch provides first speed.
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| Illustration 2 | g03672106 |
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Power Flow in First Speed Forward (4) Number 2 sun gear (5) Number 2 clutch (6) Ring gear for Number 2 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 (22) Output shaft (23) Input gear and shaft (25) Number 2 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 forward, the Number 6 clutch and the Number 2 clutch are engaged. The Number 2 clutch holds ring gear (6) for the Number 2 clutch stationary. The "Number 6" clutch holds ring gear (17) for the Number 6 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 and "Number 3" carrier (7) to turn in the same direction as input shaft (23). 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 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 4" sun gear (11). The "Number 4" sun gear turns output shaft (22). Housing assembly (28) turns sun gear (19) for "Number 6" clutch (16).
Because ring gear (17) is held stationary by the "Number 6" clutch, planetary gears (29) move around the inside of the ring gear. The movement of planetary gears (29) and "Number 6" carrier (18) turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3" planetary gears (26), "Number 4" sun gear (11), and "Number 6" carrier (18). From the output shaft, power flows through the output transfer gears to the differentials.
When the transmission is in second speed forward, the Number 5 clutch and the Number 2 clutch are engaged. The Number 2 clutch holds ring gear (6) for the Number 2 clutch stationary. The "Number 5" clutch holds rotating hub (15) 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). 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 (13) for the "Number 4" clutch is fastened to housing assembly (28) with splines. The "Number 4" planetary gears also turn "Number 4" sun gear (11). The "Number 4" sun gear turns output shaft (22).
Because rotating hub (15) is held stationary by "Number 5" clutch (14), power is sent through the "Number 5" clutch to the rotating hub. Rotating hub (15) turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3 " planetary gears (26), "Number 4" sun gear (11), and rotating hub (15). From the output shaft, power flows through the output transfer gears to the differentials.
Note: The 826K machine does not have a clutch 4 (Third Speed)
When the transmission is in third speed forward, the Number 4 clutch and the Number 2 clutch are engaged. The Number 2 clutch holds ring gear (6) for the Number 2 clutch stationary. The "Number 4" clutch holds ring gear (13) for the Number 4 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" and "Number 3" carrier (7) to turn in the same direction as input shaft (23). As the Number 2 and "Number 3" carrier turns, "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 carrier (10).
Because ring gear (13) is held stationary by the "Number 4" clutch, planetary gears (27) move around the inside of the ring gear. The movement of planetary gears (27) and of "Number 4" carrier (10) causes "Number 4" sun gear (11) to turn. The "Number 4" sun gear turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3" planetary gears (26) and "Number 4" sun gear (11). From the output shaft, power flows through the output transfer gears to the differentials.
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.
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| Illustration 3 | g03672107 |
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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 4" sun gear (11). The "Number 4" sun gear turns output shaft (22). Housing assembly (28) turns sun gear (19) for "Number 6" clutch (16).
Because ring gear (17) is held stationary by the "Number 6" clutch, planetary gears (29) move around the inside of the ring gear. The movement of planetary gears (29) and "Number 6" carrier (18) turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3" planetary gears (26), "Number 4" sun gear (11), and "Number 6" carrier (18). From the output shaft, power flows through the output transfer gears to the differentials.
When the transmission is in second speed reverse, the Number 1 clutch and the Number 5 clutch are engaged. The Number 1 clutch holds coupling (1) for the Number 1 clutch stationary. The "Number 5" clutch holds rotating hub (15) stationary.
Input shaft (23) turns "Number 1" sun gear (21). 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 (27) also turn "Number 4" sun gear (11). The "Number 4" sun gear turns output shaft (22).
Because rotating hub (15) is held stationary by "Number 5" clutch (14), power is sent through the "Number 5" clutch to the rotating hub. Rotating hub (15) turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3" planetary gears (26), "Number 4" sun gear (11), and rotating hub (15). From the output shaft, power flows through the output transfer gears to the differentials.
Note: The 826K machine does not have a clutch 4 (Third Speed)
When the transmission is in third speed reverse, the Number 1 clutch and the Number 4 clutch are engaged. The Number 1 clutch holds coupling (1) for the Number 1 clutch stationary. The "Number 4" clutch holds ring gear (13) for the Number 4 clutch stationary. Input shaft (23) turns "Number 1" sun gear (21). 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 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).
Because ring gear (13) is held stationary by the "Number 4" clutch, planetary gears (27) move around the inside of the ring gear. The movement of planetary gears (27) and of "Number 4" carrier (10) causes "Number 4" sun gear (11) to turn. The "Number 4" sun gear turns output shaft (22).
As a result, torque to output shaft (22) is divided between "Number 3" planetary gears (26) and "Number 4" sun gear (11). From the output shaft, power flows through the output transfer gears to the differentials.
When the transmission is in fourth speed reverse, the Number 1 clutch and the Number 3 clutch are engaged. The Number 1 clutch holds coupling (1) for the Number 1 clutch stationary. The Number 3 clutch holds ring gear (9) for the Number 3 clutch stationary. Input shaft (23) turns "Number 1" sun gear (21). 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).
Ring gear (9) is held stationary by the Number 3 clutch. With the 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.