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SECTION 2 - OPERATION
2-37
POWERSHIFT TRANSMISSION OPERATION
The powershift transmission gears are
constantly in mesh. Gear shifting is done by the
use of eight clutches in the transmission.
There are twelve forward speeds and two
reverse speeds.
Clutch selection is controlled by electric solenoid
valves which direct hydraulic oil to the required
clutches. When the operator selects a gear, an
electronically controlled shift system activates
the solenoids required for the specified gear.
The tractor may be started by either moving the
shift lever in the appropriate direction (forward or
reverse) or by using the clutch pedal.
The clutch pedal is used to modulate pressure to
the master clutch allowing the operator to feather
engagement to any of the first seven forward
gears or first reverse gear. Use of the clutch
pedal allows for safe, accurate positioning of the
tractor when hitching upimplements or operating
in confined spaces. Optimum inching control,
particularly with heavy loads, is best achieved in
lower gears and by reducing engine RPM.
The powershift transmission controller has
built-in error codes which may appear on the
powershift display of the tractor. Refer to
“Transmission Troubleshooting” in Section 4 for
an explanation and possible causes of the error
codes.
3N
Powershift Transmission Shifting
When the tractor is started, the transmission
display module will display 3N showing that the
shifter is in neutral position and that it is the
default 3
rd
gear selection. Depressing the clutch
pedal with the tractor stationary will
automatically change the transmissionto the first
gear setting. By shifting the shift lever forward
with inching pedal released, the transmission
automatically will go to any operator pre--
selected gear from 1
st
thru 7
th
gears.
NOTE: When gears 4 thru 7 are selected, the
programming starts the tractor in 3rd gear
and automatically shifts up to the pre--
selected gear.
Figure 2-54