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| Illustration 1 | g00608892 |
The transmission control has six positions.
(1) FIRST position
(2) SECOND position
(3) THIRD position
(4) DRIVE position
(5) NEUTRAL position
(6) REVERSE position
The transmission control incorporates the following switches.
(7) Transmission hold switch
(8) Neutral Lock switch
(9) High gear switch
Refer to Operation and Maintenance Manual, "Transmission Control".
| NOTICE |
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The machine must be stopped and the engine at low idle before changing direction. After moving the transmission control, do not accelerate until after hearing or feeling the transmission clutches engage. |
When the transmission control is in NEUTRAL position (5), the neutral lock prevents the transmission control from being accidentally moved into a gear position.
Press neutral lock switch (8), and move the transmission control forward in order to select the following gears.
"R" - REVERSE gear
"D" - DRIVE
"3" - THIRD gear
"2" - SECOND gear
"1" - FIRST gear
If you select one gear from the following gears, the transmission will upshift through the gears. First gear, second gear and third gear. The transmission will not upshift higher than the gear that has been selected. If drive is selected, the transmission will automatically shift between gears according to the conditions.
Stop the machine and ensure that the engine is at low idle. When you move the transmission control from NEUTRAL position to DRIVE position, first gear and torque converter drive will be engaged.
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. During higher ground speeds of first gear and of other forward gears, the lockup clutch will be 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.
A downshift inhibitor prevents the operator from forcing a downshift. When the machine is in motion and the transmission control 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.
Press neutral lock switch (8) and move the transmission control backward in order to select reverse gear. When you select reverse gear the transmission hold control will be automatically activated. In order to shift to the second reverse gear, cancel transmission hold control by pressing transmission hold switch (7). The transmission will automatically shift between the two reverse gears according to conditions.
In order to limit the highest gear that can be engaged, select one gear from the following gears: first gear, second gear and third gear.
Limit the highest gear with the transmission hold switch under the following conditions.
- If you are driving the machine down a grade and the retarder is selected. Consider the ground conditions and consider the degree of the down grade. Use your experience to select the gear that will give the best performance from the retarder. As you approach the down grade, slow the machine until the actual gear indicator displays the appropriate gear. Press the transmission hold switch in order to hold the transmission in the selected gear. When the engine speed reaches the engine rpm limit the Power Train Electronic Control Module (ECM) will override the transmission hold switch. The transmission will upshift to the next higher gear in order to prevent engine overspeed. If top gear is selected the lockup clutch will be deactivated. In order to allow the transmission to shift normally through the gears, press the transmission hold switch again when you reach the bottom of the down grade.
- As you approach the up grade, press the transmission hold switch in order to hold the transmission in the selected gear and prevent unwanted upshifts. When the machine is in first gear and the machine ground speed decreases the Power Train ECM will override the transmission hold switch. The Power Train ECM will disengage the lockup clutch and the torque converter will shift into torque converter drive. When any other forward gear has been selected the transmission will downshift one gear below the selected gear. This will only occur when the engine rpm and the ground speed fall below the downshift point. In order to allow the transmission to shift normally through the gears, press the transmission hold switch again when you reach the top of the up grade.
The transmission should be held in gear under the following conditions.
- If you are driving in soft ground conditions, the transmission might shift frequently between gears. If this occurs select the lower gear of the two gears in order to retain the selected gear. In order to allow the transmission to shift normally through the gears, press the transmission hold switch again when the ground conditions improve.
High gear switch (9) allows fourth gear or fifth gear to be selected as the highest gear. Fourth gear or fifth gear may be selected as the highest gear while the engine is running. Fourth gear or fifth gear may also be selected as the highest gear with the engine start switch in the ON position. The engine does not need to be running for this procedure. Turn the engine start switch to the ON position and move the transmission control to the DRIVE position. When high gear switch (9) is pressed, the actual gear indicator will alternate between "4" and "5". This will occur after a five second delay and each number will flash for approximately two seconds. Release high gear switch (9) when the required gear is displayed. The actual gear indicator will confirm the selected gear by displaying the selected gear for four seconds. If the engine start switch is turned to the OFF position before starting the engine, this procedure must be repeated as the transmission will revert to normal operation. The high gear switch can be used when there is a need to limit the speed of the machine.
At all times, drive the machine at a safe speed according to the following conditions.
- The condition of the site
- The condition of the weather
- The loaded state of the machine
Maintain the correct stopping distance under all conditions.