Traction Pedal Potentiometer
The traction pedal potentiometer is connected to the
traction pedal assembly (Fig. 112). This potentiometer
determines the neutral band for the traction pedal, the
direction of travel desired by the operator and the trac-
tion speed. The potentiometer is a single analog, dual
digital signal electronic device. The potentiometer por-
tion is a variable resistor that provides an analog signal
for the TEC--5002 controller to determine the desired
ground speed based on how far the traction pedal is
moved. The traction pedal potentiometer also houses
two (2) switches that are used to determine the neutral
position (deadband) and the indicated direction oftravel
(forward or reverse). As the traction pedal is depressed,
theinternalwiperofthepotentiometermovesandsends
the analog signal to the TEC--5002 controller to deter-
mine machine direction and speed.
2
1
Figure 112
The traction pedal potentiometer must be calibrated
with the TEC--5002 controller to determine the neutral
and full speed set points for both the forward and re-
verse directions.
1.
Traction pedal
2.
Traction potentiometer
A properly installed and calibrated traction pedal poten-
tiometer is critical to accurate traction response and po-
tentiometerlife.Usecarewheninstalling andcalibrating
the potentiometer.
Before suspecting a faulty potentiometer, follow calibra-
tion procedures for the traction pedal potentiometer
found in the Adjustments section of this chapter. If po-
tentiometer replacement is necessary, see Traction
Pedal in the Service and Repairs section of Chapter 6
--
Chassis.
Groundsmaster 5900/5910
Page 5 -- 61
Electrical System
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