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Groundsmaster 5900/5910 Page 5 -- 61 Electrical System
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 of travel
(forward or reverse). As the traction pedal is depressed,
the internal wiper of the potentiometer moves andsends
the analog signal to the TEC--5002 controller to deter-
mine machine direction and speed.
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.
A properly installed and calibrated traction pedal poten-
tiometer is critical to accurate traction response and po-
tentiometer life. Use carewhen installing and calibrating
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.
1. Traction pedal 2. Traction potentiometer
Figure 112
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2
Electrical
System