caution - Toro

Fuel Gauge
The fuel 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 (see Fuel Sender Testing in this
section for additional information).
Testing
CAUTION
Make sure the voltage source is turned OFF before
connecting it to the electrical circuit to avoid
electrical shock and prevent damaging the
gauge.
VARIABLE
RESISTANCE
14 VDC + 0.01 VDC
1. Connect fuel gauge to the variable resistance and
DC voltage source (Fig. 36).
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.
-
+
Figure 36
1 2
2. Take test point readings (Fig. 37).
IMPORTANT: Allow circuit to warm up for at least 5
minutes before taking test readings.
A. Set variable resistance to 240 ohms. Apply a 14 +
0.01 VDC to the circuit. The needle should point to
the left edge of the red area (empty).
Electrical
System
B. Set variable resistance to 33 ohms. The needle
should point to the right edge of the green area (full).
3. Turn off the voltage source. Disconnect voltage
source, gauge and variable resistance.
1. Empty position
2. Full position
Figure 37
3. Glass face edge
3
Groundsmaster 4100--D Page 5 - 25 Electrical System