High Temperature Shutdown Switch - Toro Reelmaster 3100-D Service Manual

High Temperature Shutdown Switch

Testing
Reelmaster ® 3100-D/3105-D
20252SL Rev A
g342503
1. Temp. shutdown switch
2. Alternator
The high temperature shutdown switch
pump housing on the engine and has a blue/white wire attached to it. This
switch is normally open and closes when engine coolant temperature reaches
approximately 110°C (230°F). The closed switch provides an input to the
Standard Control Module (SCM).
This input causes the SCM high temperature shutdown LED to illuminate and
the cutting deck to shut down. The high temperature shutdown switch and
circuit wiring should be tested as a SCM input before performing the following
testing procedure.
1. Park the machine on a level surface, lower the cutting deck, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Unlatch the hood and raise it.
If the radiator or engine is hot, pressurized hot coolant can escape
and cause burns.
Do not open the radiator cap or drain the radiator when the coolant
is hot. Ensure that the engine is cool before removing the high
temperature shutdown switch from the engine.
3. Lower the coolant level in the engine.
4. Remove the wire harness connector from the high temperature shutdown
switch, and remove the switch from the engine.
Figure 132
3. Low oil press. switch
(Figure
DANGER
Page 6–31
132) is attached to the water
Electrical System: Component Testing