Toro Groundsmaster 3500 30807 Service Manual page 219

Oil Pressure Switch
The engine oil pressure switch is located on the engine
below the alternator (Fig.33). The oil pressure switch is
a normally closed switch that opens with pressure. The
oil pressure switch should open at approximately 8 PSI
(0.56 kg/cm ).
2
If low engine oil pressure allows the oil pressure switch
to close during engine operation, the engine oil pressure
light should illuminate.
Testing
NOTE: Refer to the Kubota Workshop Manual for infor-
mation regarding engine lubrication system and testing.
1. Set the ignition switch to the RUN position. The oil
pressure indicator light on the control panel should be
illuminated.
2. If the indicator light is not illuminated, open hood to
gain access to engine.
3. Locate oil pressure switch on engine and disconnect
the harness wire from the switch.
4. With the ignition switch in the RUN position, ground
the disconnected wire to the engine block.
Groundsmaster 3500
1. Engine temp. sensor
2. Alternator
5. If the light comes on, the oil pressure switch is faulty.
6. If the light does not come on after step 4, check the
oil pressure light circuit wiring and indicator light (see In-
dicator Lights in this section).
7. After testing is completed, connect the harness wire
to the switch. Lower and secure hood.
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1
2
3
Figure 33
3. Oil pressure switch
Electrical System