Troubleshooting - Toro 520XI Service Manual

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5xi Series Tractor Service Manual
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ELECTRICAL
The amount of current flow is controlled by the
sender which consists of a rheostat connected
to a float mounted in the fuel tank. When the
tank is Full, the float is high and the resistance
of the rheostat is low, allowing more current
flow which moves the needle to the Full mark.
As fuel is consumed, the float moves down
increasing the resistance and allows less
current flow. This causes the needle to move
toward empty.
If the fuel gauge is inoperative:
1. Disconnect the wire from the sender. When
the circuit is open (no current flow), the
gauge should read empty.
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Troubleshooting

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