OM3-80 12/21
Lubrication & Maintenance/2000 Hour/24 Month (Continued)
OUOD006,0000095 -19-19JUN07-1/1
Inspecting Thermostats and Testing Opening
Temperature
1. Remove thermostats. (See REMOVING
THERMOSTATS earlier in this section.)
2. Visually inspect thermostats for corrosion or damage.
Replace thermostats as a matched set as necessary.
3. Inspect thermostat with wiggle wire in vent notch. If
wire movement is restricted, replace thermostat if
cleaning does not free movement.
CAUTION: DO NOT allow thermostat or
thermometer to rest against the side or bottom
of container when heating water. Either
may rupture if overheated.
4. Suspend thermostats and a thermometer in a
container of water.
5. Stir the water as it heats. Observe opening
action of thermostat and compare temperatures
NOTE: Due to varying tolerances of different supplies,
initial opening and full open temperatures may
6. Remove thermostat and observe its closing action as
it cools. In ambient air the thermostat should close
completely. Closing action should be smooth and slow.
RG5971
—UN—23NOV9
7
Thermostat And Thermometer In Water
7. If any one thermostat is defective, replace both
thermostats.
46
