Magnetic switches (Reed Switches)
Magnetic switches (Reed Switches)
Description:
Magnetically operated switches that control current
flow in the circuit.
Types:
Seat switches
Testing
Magnetic
reed
switches
are
tested
with
an
Ohmmeter and using a magnet to close the switch.
1.
Magnet away from switch, meter reading O.L.
(open)
Figure 30
2.
Magnet
close
to
switch,
Meter
reading
0.2
A (closed)
Pressure switches.
Pressure switches.
Description:
Pressure operated switches that control current flow
for lights and gauges.
Types:
1.
2.
3.
Engine oil pressure
Hydraulic oil pressure
Filter restriction senders
Testing
Pressure switches are tested with an Ohmmeter.
Look for continuity when closed, infinity when open.
They can be normally open and close at a certain
pressure, or normally closed and open at a certain
pressure.
Figure 31
Temperature senders and switches
Temperature senders and switches
Description:
Temperature controlled switches and senders.
Types:
1.
2.
Engine coolant temperature switch and sender
Hydraulic system temperature switch and sender
Figure 32
13
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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