High Temperature Warning and Shutdown Switches
The high temperature warning and shutdown switches
arelocated onthe water pump housing, which islocated
on the rear end of the engine block. The high tempera-
ture shutdown switch is on the alternator side of the en-
gine (Fig. 26).
3
1
CAUTION
2
Make sure engine is cool before removing the
temperature switch.
1.
Lower coolant level in the engine and remove the
temperature switch.
Figure 26
1.
2.
Temp. warning switch
Temp. shutdown switch
3.
Water pump housing
2.
Put switch in a container of oil with a thermometer
and slowly heat the oil (Fig. 27).
VOA
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
3.
Check continuity of the switch with a multimeter
(ohms setting).
Figure 27
A. The high temperature warning switch is normally
openandshouldclose between216to226oF(102to
108
oC).
B. Thehightemperatureshutdownswitchisnormal-
ly open and should close between 225 to 235oF(107
to 113oC).
4.
5.
Allow oil to cool while observing temperature.
A. The high temperature warning switch should
open at about 208oF (98oC).
B. The high temperature shutdown switch should
open at about 219oF (104oC).
Replace switch if necessary.
Electrical System (Rev. D)
Page 5 -- 18
Groundsmaster 3500--D
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