Toro Reelmaster 3100-D Service Manual page 254

Testing (continued)
Electrical System: Component Testing
g226814
5. Put the end of the switch in a container of fluid with a thermometer and then
slowly heat the fluid
The fluid is hot and could cause personal injury or fire.
Handle the hot fluid with extreme care.
Note: Before taking the small resistance readings with a digital multimeter,
short the multimeter test leads together. The meter will display a small
resistance value (usually 0.5 ohms or less). This resistance is because of the
internal resistance of the multimeter and test leads. Subtract this value from
the measured value of the component you are testing.
6. Check the resistance of the switch with a multimeter (ohms setting) as the
fluid temperature increases.
7. The high temperature warning switch is normally open and should close
between 102 to 108ºC (216 to 226ºF).
8. Allow fluid to cool while observing temperature.
9. The high temperature warning switch should open at about 98ºC (208ºF).
10. If the switch does not meet the specifications, replace the switch.
11. After you complete the testing, install the temperature switch to the engine
housing, do the following steps:
A. Clean the threads of the housing and switch. Apply thread sealant to
the threads of the switch.
B. Thread the switch into the housing; torque the switch to 29.4 to 39.2
N∙m (22 to 28 ft-lb).
C. Connect the harness wires to the temperature switch.
12. Fill the engine cooling system; refer to the Traction Unit Operator's Manual.
13. Lower the hood and secure it with the latches.
Figure 131
(Figure 131).
CAUTION
Page 6–30 Reelmaster ® 3100-D/3105-D
20252SL Rev A