Operation and maintenance manual

Section 120-0010
7
SM 2124 Rev 3 8-03
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, body hydraulics joystick 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