High Temperature Shutdown Switch - Toro Reelmaster 2000-D Service Manual

High Temperature Shutdown Switch

The high temperature shutdown switch is located on the
top of the water pump housing. The water pump is on the
left end of the engine inside the fan pulley assembly.
There is a blue/white wire attached to the shutdown
switch.
The Standard Control Module monitors the operation of
the high temperature shutdown switch. If the ignition
switch is in the ON position and the high temperature
shutdown switch is closed (excessive coolant tempera-
ture), the Module Hi Temp input LED should be illumi-
nated.
High Temperature Shutdown Switch Test
1. Lower the coolant level in the engine and remove the
high temperature shutdown switch.
2. Put the switch in a container of oil with a thermometer
and slowly heat the oil (Fig. 15).
Handle the hot oil with extreme care to prevent
personal injury or fire.
3. Check the continuity of the switch with a multimeter
(ohms setting). The switch is normally open and should
o o
close at 238 F (114 C).
4. Allow the oil to cool. The switch should open at 232
o
(111 C).
Reelmaster 2000–D
CAUTION
o
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1. Temperature switch
F
1
Figure 14
2. Water pump housing
VOA
Figure 15
Electrical System