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

High Temperature Warning Switch

Testing
Reelmaster ® 3100-D/3105-D
20252SL Rev A
g342502
1. Temp. warning switch
The high temperature warning switch
housing on the engine and has a gray wire attached to it. This switch is normally
open and closes when the engine coolant temperature reaches approximately
105°C (220°F). The closed switch causes the high temperature warning light on
the console to illuminate and also provides an input to the Standard Control
Module (SCM).
This input causes the SCM high temperature warning LED to illuminate and
the cutting unit to shut down. The high temperature warning 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 warning switch from the engine.
3. Lower the coolant level in the engine.
4. Remove the wire harness connector from the high temperature warning
switch, and remove the switch from the engine.
Figure 130
2. Rear lift tab
(Figure 130) is attached to the water pump
DANGER
Page 6–29 Electrical System: Component Testing