53Service Manual – SC6000 20 - Wheel System, Traction
Maintenance and Adjustments
Drive Pedal Neutral Adjustment
Because the drive pedal potentiometer is set up in a wig-wag conguration, it is necessary to adjust the mid-
point of the potentiometer to coincide with the relaxed position of the physical pedal. The Drive Controller
places 5 volts on the potentiometer, and the mid-point neutral position should have 2.5 volts from the
potentiometer wiper.
CAUTION: To reduce the risk of inadvertently activating the
drive system, make sure all safety measures are
in place. Always be prepared for the machine to
move unexpectedly.
1. Power-on the machine with technician user level. If the machine
errors due to a throttle position error, you may ignore it for now.
2. For safety, press the E-Stop button and make sure nothing is on
the operator’s seat that could close the seat switch.
3. Navigate to the E4 Drive Controller menu and scroll down to the “Throttle Voltage” status.
4. Make sure the drive pedal is in the center, relaxed position.
5. Check the Throttle Voltage listing on the display. If it is not 2.8 ± 0.2 volts, adjust the potentiometer
position.
a. Loosen the two screws that secure the
potentiometer to the pedal housing.
b. If the voltage is below 2.8V, rotate the
potentiometer body clockwise slightly.
c. If the voltage is above 2.8V, rotate the
potentiometer body counterclockwise slightly.
d. Without moving the potentiometer, retighten
the mounting screws.
• Note that the tolerance for the potentiometer
of ± 0.2 volts is narrower than the tolerance
that the drive controller considers the neutral
position (± 0.5 volts). This provides a margin
of error for the actual operation of the pedal during use.
E4 Drive Controller
Speed (mph/kph)
Back
Scroll
Throttle %
Throttle Voltage
M11 Current
0.0
0
2.8
0.0
Mounting
Screws
Potentiometer
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