ELECTRICAL
6-13Z580/Z593/Z595 Diesel Service Manual
6
How It Works
Testing
When the water temperature reaches an excessive
operating temperature the switch will close internally
and ground the high temperature audible alarm. This
completes the alarm circuit and the alarm sounds (Fig.
670).
The oil pressure switch completes the circuit that
activates the hour meter and the radiator fan relay.
Fig 670 PICT-4161a
It is not practical to test the switch in a shop environ-
ment. The temperature switch closes at 230º F (110º C).
Oil Pressure Switch
Purpose
Location
The oil pressure switch is located on the right side of the
engine under the alternator (Fig. 671).
Fig 671 PICT-4164
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