Groundsmaster 4300--D Page 5 -- 41 Electrical System
Oil Pressure Switch
The engine oil pressure switch is located on the engine
near the oil filter (Fig.52). The oil pressure switch is a
normally closed switch that opens with pressure.
The oilpressure switch shouldopen at approximately 8
PSI (0.56 kg/cm
2
).
The TEC controller monitors the operation of the oil
pressureswitch.Theswitchanditscircuitwiringshould
be tested as a c ontroller input with the Diagnostic Dis-
play (see Special Tools and Troubleshooting in this
chapter).
Iflowengineoilpressureallowedtheoilpressureswitch
to close during engine operation, the Diagnostic light
can be usedto identify the fault(see Diagnostic Light in
the Troubleshooting section of this chapter).
Testing
NOTE: Refer to Kubota Workshop Manual, Diesel En-
gine, 05--E3B Series at the end of Chapter 3 -- Kubota
Diesel Engine for information regarding engine lubrica-
tion system and testing.
1. Turn 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. Locateoilpressureswitchonengineanddisconnect
the wire harness connector from the switch.
4. With the ignition switch in the RUN position, ground
the disconnected wire to the engine block.
5. Iftheindicatorlightcomeson,theoilpressureswitch
is faulty.
6. If the indicator light does not come on after step 5,
check the oil pressure indicator light and circuit wiring
(see Indicator Lights in this section).
7. After testing is completed,connect the wire harness
connector to the oil pressure switch. Lower and secure
hood.
1. Oil filter 2. Oil pressure switch
Figure 52
2
1
Electrical
System
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