Oil Pressure Switch; Purpose; Location; How It Works - Toro Z580 DFI Z Master Service Manual

ELECTRICAL
Oil Pressure Switch

Purpose

The oil pressure switch completes the circuit that activ-
ates the hour meter and the radiator fan relay.

Location

The oil pressure switch is located on the lower left side
of the engine block, next to the engine oil filter (Fig. 535).
6
6-14
Fig 535 IMG-0683a
How It Works
When the engine oil pressure builds, the switch closes
to complete the circuit for both the hour meter and the
cooling fan relay (Fig. 536).
Fig 536

Testing

The switch can be tested with an ohmmeter. There
should be no continuity between the wire terminal and
ground with the engine not running. There should be
continuity between the wire terminal and ground when
the engine is running.
Z580/Z589 DFI Z Master Service Manual
IMG-0690a