user manual

Groundsmaster 4100--DPage 5 -- 24Electrical System
Fuel Sender
The fuel sender is located on top of the fuel tank.
Testing
1. Remove white wire and black ground wire from the
sender.
CAUTION
Iftestingcircuitwiringandfuelgauge,makesure
wire connections are secure before turning igni-
tion switch ON to prevent an explosion or fire
from sparks.
2. To test the circuit wiring and fuel gauge, connect
white and black wires and turn ignition switch to ON.
Fuel gauge needle should point to the right edge of the
green area(full). Turn ignition switchOFF and continue
testingfuelsenderifcircuitwiringandgaugeareaccept-
able.
3. Remove screws and lock washers that secure the
sender to the fuel tank.
4. Removesenderandgasketfromthefueltank.Clean
any fuel from the sender.
NOTE: Before taking small resistance readings with a
digital multimeter, short meter test leads together. The
meterwilldisplayasmallresistance value.Thisinternal
resistance of the meter and test leads should be sub-
tracted from the measured value of the component.
CAUTION
Makesuresendingunitiscompletelydry(nofuel
on it) before testing. Perform test away from the
tank to prevent an explosion or fire from sparks.
5. Check resistance of the sender with a multimeter
(Fig. 35).
A. Resistancewiththefloatinthefullpositionshould
be 27.5 to 39.5 ohms.
B. Resistance with the float in the empty position
should be 240 to 260 ohms.
6. Replace s ender as necessary. Reinstall sender into
fuel tank.
7. Reconnect wires to fuel sender. Apply skin--over
grease (Toro Part No. 505--165) to sender terminals.
Figure 35
FULL POSITION
EMPTY POSITION