caution - Toro

Temperature Gauge
The temperature gauge can be tested using a new
gauge as a substitute or with the use of a DC voltage
source and a variable resistance box.
Testing
CAUTION
Make sure the voltage source is turned OFF before
connecting variable resistance to the electrical
circuit to avoid electrical shock and to prevent
damaging the gauge.
VARIABLE
RESISTANCE
14 VDC + 0.01 VDC
1. Connect temperature gauge to the variable resistance
and DC voltage source (Fig. 46).
NOTE: When reading the gauge test point, there are
two white dots on the gauge face below the edge of the
glass cover for each test point. For each variable resistance
setting, the needle must be pointed between the
two white dots.
2. Take test point readings (Fig. 47).
IMPORTANT: Allow circuit to warm up for at least 5
minutes before taking test readings.
A. Set variable resistance to 71 ohms. Apply a 14 +
0.01 VDC to the circuit. The needle should point to
the middle of the green area (80 o C).
B. Set variable resistance to 38 ohms. The needle
should point between the green and red area
(105 o C).
3. Turn off the voltage source. Disconnect voltage
source, gauge and variable resistance.
Figure 46
1
-
+
2
3
1. Middle position
2. High temp. position
Figure 47
3. Edge of glass cover
Electrical System
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Groundsmaster 4100--D