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| Illustration 1 | g00478276 |
Transmission Components (1) Coupling (2) Ring gear for Number 1 clutch (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 (part of 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. The transmission direction and speed control lever is used to select speed and direction manually in machines that are equipped with Conventional Steering. In machines that are equipped with Command Control Steering, direction is manually selected with the transmission direction control switch. In machines that are equipped with Command Control Steering, speed is manually selected with the upshift switch and with the downshift switch.
The transmission is fastened 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 |
| 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 |
| 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. |
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, the Number 4 clutch, the Number 5 clutch, and the 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.
First Speed Forward
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| Illustration 2 | g00478277 |
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.
Second Speed Forward
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 2 for a typical example of power flow in the forward direction.
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.
Third Speed Forward
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 2 for a typical example of power flow in the forward direction.
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.
Fourth Speed Forward
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 2 for a typical example of power flow in the forward direction.
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. Because the ring gear is stationary, 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
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| Illustration 3 | g00478279 |
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.
Second Speed Reverse
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 3 for a typical example of power flow in the reverse direction.
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.
Third Speed Reverse
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 3 for a typical example of power flow in the reverse direction.
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.
Fourth Speed Reverse
Refer to Illustration 1 for the location of the components, as described below. Refer to Illustration 3 for a typical example of power flow in the reverse direction.
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. Because the ring gear is stationary, 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.