Fuel Gauge Sender - Toro Workman HDX Auto Service Manual

Fuel Gauge Sender

The fuel gauge sender on Workman HDX Auto vehicles
is included with the fuel pump assembly that fits into the
fuel tank (Fig. 31).
Testing
1. Park machine on a level surface, raise bed, stop en-
gine, apply parking brake and remove key from ignition
switch. Install bed support on bed lift cylinder to prevent
bed from lowering.
2. Disconnect the wire harness connector from the fuel
pump assembly.
CAUTION
When testing circuit wiring and fuel gauge
sender, make sure wire connections are secure
before turning ignition switch to RUN to prevent
an explosion or fire from sparks.
3. To test the circuit wiring and fuel gauge on the dash,
use a jumper wire to connect the two (2) terminals in the
fuel pump assembly wire harness connector. Make sure
that jumper wire connections are secure. Turn ignition
switch to ON. Fuel gauge should indicate a full fuel tank.
Turn ignition switch OFF and continue testing fuel send-
er if circuit wiring and gauge are acceptable.
4. Remove fuel pump assembly from the fuel tank (see
Fuel Pump in the Service and Repairs section of Chapter
3 − Kohler Gasoline Engine). Clean all fuel from the
pump assembly.
CAUTION
Make sure sending unit is completely dry (no
fuel on it) before testing. Perform test away from
the tank to prevent an explosion or fire from
sparks.
5. Using a multimeter, check that there is a change in
resistance of the sender as the float is moved from the
empty (completely down) to the full (completely up) posi-
tion (Fig. 32).
6. Replace fuel pump assembly if the fuel sender is
faulty.
Electrical System
7. After testing, install pump assembly into fuel tank and
secure with gasket and fuel pump cap (see Fuel Pump
in the Service and Repairs section of Chapter 3 − Kohler
Gasoline Engine). Secure fuel hose to pump fitting and
connect fuel pump assembly connector to vehicle wire
harness.
8. Remove bed support from cargo bed lift cylinder and
lower bed.
1. Fuel pump assembly
2. Fuel pump cap
3. Gasket
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2
1. Sender full position
Page 6 − 24
175 to 200 in−lb
(20 to 22 N−m)
5
2
3
6
FRONT
Figure 31
4. Fuel supply hose
5. Fuel vent hose
6. Fuel tank
Figure 32
2. Sender empty position
Workman HDX Auto
1
4