eel S ste
raction
Service Manual – SC8000
12. Check the maximum forward and reverse wheel speeds and adjust the pedal stops as necessary. Refer to
the
6SHFL¿FDWLRQV3URSXOVLRQ3XPS&LUFXLWV
table in the
raulic S ste
section for nominal wheel
speeds.
13. Turn the engine off, then see if it will restart. If engine will not start, the
Rotary Sensor
is probably out
of its neutral (deadband) range and needs to be recalibrated. See the
oot e al eutral
ea
an
ust ent
section for programming instructions.
14. Lower the machine and reinstall the recovery tank.
oot e al eutral ea
an ust ent
The resistance through the Rotary Sensor (rotary potentiometer) attached to the hydrostatic Piston Pump
linkage will vary with the position of the linkage. The Driver Box must see the resistance through the Rotary
6HQVRUZLWKLQDSDUWLFXODUUDQJHFDOOHGWKHQHXWUDO´GHDGEDQGµWRFRQÀUPWKH3LVWRQ3XPSLVLQQHXWUDO
before the Driver Box will allow the engine to start.
Once the engine is started, depressing the foot pedal moves the Rotary Sensor out of the deadband range.
When the Driver Box sees the resistance from the Rotary Sensor out of the deadband range, it activates the
various scrub/sweep functions.
Whenever you change or repair the foot pedal linkage components or the hydrostatic unit, or if you replace
the Rotary Sensor or Control Board (Driver Box), you will have to recalibrate the neutral deadband position
and set the sensitivity as follows:
1. Depress the foot pedal to the full reverse position, then allow the pedal to slowly return to its neutral
position. Do not move the pedal during the remainder of this procedure.
2. Press and hold the Engine Speed switch, then turn the ignition Key Switch to the run (on)
position. Continue to hold the Engine Speed switch until all the display panel lights turn off
(approximately three seconds), then release the switch.
7KHÀUVWOLQHRIWKH/&'ZLOOUHDG
PEDAL CALIBRATION
.
The second line of the display will read
Place Pedal in Neutral
with an arrow to the left of
the line.
The third line of the display will read
Neutral Deadband
.
3. Press the green Scrub On switch.
7KHÀUVWOLQHRIWKH/&'
will read
Neutral Set
.
The second line of the display will show the resistance value, in ohms, that the control
board is reading through the rotary sensor. Note that it’s normal for this value to drift a
little.
4. Press the green Scrub On switch to set the nominal deadband resistance value. The display will return
to the previous menu.
5. Press the Side Broom Down (
-
) switch to move the arrow to the left of the
Neutral
Deadband
line.
6. Press the green Scrub On switch to display the
Neutral Deadband
range menu. The
percentages shown are the limits the resistance from the rotary sensor can vary from
the
Neutral Set
(nominal) resistance and still be in the deadband range and allow the
engine to start.
