High Temperature Switch

The high temperature switch is located on the top right side of the water pump, which is located on the rear end of the engine block. It has a connector which a gray wire (Fig. 59).

CAUTION

Make sure engine is cool before removing the temperature switch.

1.Lower the coolant level in the engine and remove the high temperature switch.

2.Put the switch in a container of oil with a thermome­ ter and slowly heat the oil (Fig. 60).

CAUTION

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 close between 245 to 255_F (118 to 124_C).

Figure 59

Figure 60

4.Allow the oil to cool. The switch should open below

245_F (118_C).

Electrical System

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Groundsmaster 3000/3000–D

Page 138
Image 138
Toro 3000D manual High Temperature Switch