Cooling system
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L
Check
Check to see if the thermostat pad is damaged.
Check the functioning of the thermostat as follows:
• Suspend the thermostat by a piece of string threaded
through the flange as indicated in the figure.
• Immerse the thermostat in water contained in a labo-
ratory glass as indicated in the figure. Ensure that the
thermostat is maintained in suspension. Heat the
water with a heat source and observe the increase in
temperature of the thermometer.
• Observe the temperature at the moment of opening of
the thermostat. The temperature at which the thermo-
stat commences to open should be between the indi-
cated values.
Standard
Thermostat opening temperature:
74,5 - 78,5°C
• Continue to heat the water to increase the tempera-
ture.
• When the temperature of the water reaches the spec-
ified value, the thermostat should be raised up by at
least 7 mm.
Standard
Raising up of the thermostat:
More than 7.0 mm at 90°c.
• If the thermostat does not satisfy only one of the req-
uisites (opening temperature and raising up of the
thermostat), it must be substituted.
Summary of Contents for F4 750
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Page 36: ...Cooling system L 36 ...
