Section 120-0010
7
SM 1965 4-00
OPERATION
EST-37 Automatic Shift Control
The EST-37 transmission is equipped with an
electronic control unit (ECU) which continually
monitors the transmission and shift system electrical
components and warns the operator when a problem
develops. It also takes action to prevent damage to the
transmission, and provides the serviceman with
diagnostic capabilities so that problems can be
corrected quickly and easily.
When a fault occurs, a two digit error code will be
displayed on the LCD display on the dash panel. The
error code is also recorded in the transmission ECU,
and can be accessed by the serviceman by plugging
in a data reader to extract information relating to the
fault. The error code recorded in the ECU memory will
remain until it is erased by a technician.
If a major fault is detected, it is the operators
responsibility to shut down the machine as soon as it
is safe to do so. The machine should not be restarted
until the fault has been diagnosed and corrected.
Refer to 'EST-37 Trouble Shooting' table for a list of
fault codes and checks.
The EST-37 transmission control has been designed
to provide the driver with maximum operational
flexibility by allowing the choice of automatic or manual
gear selection to optimize vehicle performance under
all operating conditions.
The transmission provides six forward gears, three
reverse gears and a neutral position. The gear
positions are indicated on the LCD display located on
the dash panel. The transmission will only operate in
the gear selected by the operator in the manual range,
or, when the lever is in the automatic range, shifts will
occur automatically between 1st and 6th gear,
depending on operating requirements. The reverse
gears 1st through 3rd are manual mode only.
WARNING
Before any welding is done on a machine
equipped with an EST-37 shift system, disconnect
battery earth cable, battery supply cable alternator
earth cables, alternator supply positive cables
and electrical connections at the ECU to avoid
damage to electrical components. Turn off battery
master switch to isolate the batteries before
disconnecting any components.
VTS-3 Shift Controller - Operation: The shift
controller has 3 positions the lever can rest in,
Forward, Neutral and Reverse. Within each of these
positions, the gear can be changed by pushing the
lever to the right (+) to upshift or to the left (-) to
downshift. In the Neutral position, this can be used to
preselect the starting gear (the default being 2nd
gear).
The shift controller has a 'Function' button on the top
of the lever which is used to switch between automatic
and manual modes. Press the function button from
'NEUTRAL' and move the lever forward to select
automatic mode, when driving normal upshifting and
downshifting will occur. If required, a gear can be held
in manual mode by pressing the function button once,
to resume full automatic mode the function button
should be pressed again. Manual gears can also be
selected by pushing the lever to the left for lower gears
or to the right for higher gears, again by pressing the
function button once automatic mode will be resumed.
Note: The transmission will only allow gearshifting
when the predetermined values have been reached.
Note: There is no shift inhibitor in the gear shift
control, therefore, no resistance would be felt while
moving through the gear ranges.
The gear lever housing sends a signal to the electronic
control unit, which in turn will only allow the engine to
be started when the gear lever is in the 'NEUTRAL'
position. The gear shift lever must always be placed in
'NEUTRAL' and the parking brake applied when
starting the engine, or whenever the machine is left
unattended.
When shifting from 'NEUTRAL' to start from a
standstill, or to reverse direction, decelerate the engine
to idle speed before selecting the proper gear. When
'REVERSE' is selected, the 'Reverse Alarm' sounds
and the 'Reverse Light' illuminates to warn personnel
to the rear of the machine that reverse gear has been
selected.
During reversing operations it is recommended to
reduce engine speed, use only 1st or 2nd gear and
never exceed 10 km/h (6.2 mile/h).
Transmission - Transmission and Mounting
Courtesy of Machine.Market
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