- UP
- DOWN
- FORWARD
- NEUTRAL
- REVERSE
- MODE ( Reserved for Differential Lock)
Note: If you are experiencing trouble with the shifter, refer to Troubleshooting, KENR5099, "Transmission Does Not Respond to Shift Selector".
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| Illustration 1 | g01296757 |
The CX28 transmission has six forward gears and one reverse.
| NOTICE |
|---|
The machine must be stopped and the engine at low idle before changing direction. After selecting the desired range (Forward or Reverse), do not accelerate until the right digit on the shifter display is either a "1" or "R" indicating that the transmission has completed the shift. |
"R" - The "R" indicates the reverse gear. Pressing this button causes the transmission to shift into the reverse gear.
"N" - The "N" indicates the transmission neutral position. Pressing this button causes the transmission to shift to neutral.
"D" - The "D" button indicates the forward gears. Pressing this button will cause the transmission to shift into the first gear in the forward direction.
"Mode" - The Mode button is dedicated to control the state of the transfer case. When the Mode Button LED is Off, the transfer case is unlocked. When the Mode button is pressed and released, the LED is enabled and the Transfer case and rear differential interlock will be requested to engage all wheel drive mode (differential lock).
"Arrow" - Upshift
"Arrow" - Downshift
Checking the Oil Level The gearshift selector can be used in order to initiate the oil level check. The check is initiated by pressing the up arrow and the down arrow on the keypad simultaneously. The status of the oil level is displayed on the digital display.
Basic Operation
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| Illustration 2 | g01343907 |
Display showing the NEUTRAL position. | |
The display on the gearshift selector will display a pair of "Ns" when the key start switch is in the ON position. The display indicates that the transmission is in Neutral.
Range Selection
Push the "D" in order to shift to a forward gear or the "R" in order to shift to a reverse gear.
Stop the vehicle and ensure that the engine is at low idle. When you move the transmission control from the NEUTRAL position to the FORWARD position, the first gear and the torque converter drive will be engaged.
Note: When shifting out of Neutral the vehicle should be stationary and the engine must be below 1000 RPM.
As you increase engine speed and the ground speed increases, the transmission will upshift. As the ground speed continues to increase, the transmission will upshift automatically until the selected gear is reached.
If the ground speed is reduced or the engine speed is reduced by an increased load, the transmission will automatically downshift in order to select the correct gear. The transmission downshifts one gear at a time in order to select the correct gear.
A downshift inhibitor prevents the operator from forcing a downshift. When the vehicle is in motion and the gearshift selector is moved to a lower gear, the transmission will not force a sudden downshift. The transmission will not downshift until the proper ground speed is achieved.
Forward Range
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| Illustration 3 | g01343917 |
Display showing the first gear forward. | |
Note: 3 shows that the transmission is in first gear and that a total of six gears is available.
Pressing and releasing the "D" on the shift pad will result in the transmission shifting into the forward range. The left digit on the shifter will be a "6" if the Mode Button LED is Off or a "5" if the Mode Button LED is On. The right digit will be a "1" for the lowest possible gear for forward operation.
Note: The maximum gear in All Wheel drive is 5.
As engine speed and the ground speed increases, the transmission will upshift. As the ground speed continues to increase, the transmission will upshift automatically until the maximum forward gear is reached. The right digit on the shift pad will indicate the gear that the transmission has currently engaged.
If the ground speed is reduced or the engine speed is reduced by an increased load, the transmission will automatically downshift in order to select the correct gear. The transmission downshifts one gear at a time in order to select the correct gear.
The operator will not be allowed to force a downshift, using the arrow buttons, unless the engine speed and vehicle ground speed will allow that desired downshift
Manual Selection of the Highest Desired Forward Gear
The maximum desired gear of the transmission is limited for certain operations of the vehicle. When D is selected, the maximum desired gear is displayed. By using the up arrows and the down arrows on the shift pad, the maximum desired gear can be selected. Pressing the up arrow will raise the maximum desired gear by one gear to the maximum gear that is available. Pressing the down arrow will lower the maximum desired gear by one gear to the minimum gear that is available.
Once the desired gear is selected, the transmission will maintain the gear. The transmission will not shift to a higher gear unless the speed of the vehicle requires a shift. The transmission will shift in order to protect the engine from an overspeed event. The up arrow may be used in order to select the maximum gear when the conditions of operation of the vehicle no longer require the lower maximum gear.
Reverse Range
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| Illustration 4 | g01343923 |
Display showing the Reverse gear is selected but the transmission is not shifted from Neutral. | |
Push the "R" button in order to select the reverse range. The display on the gearshift selector displays an "R" on the left side and an "N" on the right side.
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| Illustration 5 | g01343924 |
Display showing the transmission inReversegear. | |
When the transmission shifts into a reverse range, the display will have an "R" in both locations. There is only one gear in the reverse range.
Flashing Desired Gear
When the transmission is not allowed to shift from Neutral, the selected gear, 1 or Reverse, will be displayed on the right digit but the Desired Gear (left digit) will flash.
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| Illustration 6 | g01343927 |
The display is showing the desired gear flashing. The transmission is held in the Neutral position. | |
Circumstances that prevent shifting into the desired gear include the following:
- The engine speed is too high.
- Vehicle speed is too high.
- Chassis switch input not in the correct state for shift from Neutral
Once the switch and the speed requirements have been met the transmission may shift normally. Some circumstances may require the operator to select Neutral and then to select the desired range again in order for the transmission to shift into the range.
Mode Button
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| Illustration 7 | g01319024 |
The Mode Button is dedicated to control of the transfer case. The Mode Button is blocked from being programmed to be an input for any other function. When the Mode Button LED is Off, the transfer case is unlocked (rear wheel drive). When the Mode button is pressed and released the LED will be enabled and the Transfer case will be requested to engage all wheel drive mode (differential lock). Pressing and releasing the Mode Button again will request the transfer case to shift into rear Wheel Drive and the Mode Button LED will be turned Off.
The transmission ECM controls the state of the Mode Button LED. If the key switch was turned off with the transfer case in All Wheel drive, Mode Button LED On, the transmission ECM will enable Mode Button LED at the next key switch On reflecting the state of the transfer case.
Oil Level Check
The shift selector pad allows the operator to check the oil level of the transmission for the operator's station. The following conditions are required for initiating the oil level check:
- Engine at idle
- The vehicle is stationary.
- Transmission oil temperature is more than 80 °C (176 °F).
Simultaneously press the up arrow and the down arrow in order to initiate the transmission oil level check. This action starts a two minute timer. If the conditions are not correct for the oil level check to take place, the shift selector pad will display one of the following display codes in Table 1.
| Display | Description |
|---|---|
| OL-ES-LO | Engine speed is too low. |
| OL-ES-HI | Engine speed is too high. |
| OL-TX- N | Neutral is not selected. |
| OL-OT-LO | Oil temperature is too low. |
| OL-OT-HI | Oil temperature is too high. |
| OL-VS-HI | Vehicle speed is not zero. |
Once the conditions have been met, the range display will show "24" and count down to "0" during the 2 minute counter period. At the end of the 2 minute countdown, one of the following display codes in Table 2 will be displayed. The display only shows two characters at a time.
Note: 5 quart limit.
| Display | Description |
| OL-LO-## | Oil level is low by ## quarts. |
| OL-HI-## | Oil level is high by ## quarts. |
| OL-OK | Oil level is full. |
The message for the oil level will continue to display until the operator exits the mode. The mode may be exited by pressing one of the range buttons or by simultaneously pressing the up arrow and the down arrow.
Single Characters
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| Illustration 8 | g02300693 |
Single N | |
A single N indicates that there is a problem with parameter programming. No programming for the Torque Converter serial number will result in a single N.
Dashes
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| Illustration 9 | g02300754 |
The shifter will display two dashes when there is no communication over the J1939 data link between the transmission and the shifter or if the transmission's serial number has not been programmed.