INSTRUMENTATION - 4D-1390-823225--1 1096
NOTE: Coolant hoses shown removed for clarity.
3. Remove switch.
TESTING
1. Connect an ohmmeter between water tempera-
ture switch terminal (+) and hex (case) for ground
(–) as shown.
72765
b
a
a - Ohmmeter Leads
b - Water Temperature Switch
2. Switch should read no continuity.
!
WARNING
The following test involves the use of intense
heat. Failure to follow appropriate procedures or
warnings can cause burns which can result in se-
vere personal injury. While performing the fol-
lowing test, observe these general precautions:
• Wear personal protective clothing such as
rubber gloves, a non-flammable apron, and
eye protection - preferably full face shield or
safety glasses.
• The appropriate heat source should only be
electric. Heat source should be operated by a
qualified person. Be sure to follow all instruc-
tions of the manufacturer of the heat source.
The heat source should be checked each time
it is used to be sure it is functioning properly.
• The thermometer used in the test should be a
high-temperature thermometer with a maxi-
mum reading of at least 300°F (150°C). Under
no circumstances should the operator allow
temperatures to exceed test specifications.
• Perform test only in a well ventilated area.
• Use a suitable container, such as metal, to
hold the sand. Avoid use of glass containers
unless the operator first confirms for himself/
herself that the glass container is an appro-
priate high-temperature vessel.
• Because the components will reach high tem-
peratures DO NOT handle materials or com-
ponents until COMPLETELY cooled.
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