Nanni Q1100 Series, User Manual

Page: 68 / 98

68
S 07 MAINTENANCE
4. Bleed the system and start the engine to check for
leaks.
Thermostat valve opening temperature
1. Push the thermostatic valve down and insert a string
between the valve and the valve seat..
2. Place the thermostat and a thermostat in a container
with water and gradually heat the water.
3. Hold the string to suspend the thermostat in the wa-
ter. As the water temperature rises, the valve on the
thermostat opens, allowing it to fall off the string.
Read the temperature at this time on the thermom-
eter.
4. Continue to heat the water and read the temperature
when the valve has risen approximately 6 mm (0.2 in).
Specifications
Thermostat valve opening
temperature
69.5 à 72.5°C
(157.1 à 162.5 °F)
Temperature at which the
thermostat opens fully
85 °C
(185 °F)
CAUTION!
If the measurement is not acceptable, replace the ther-
mostat
REPLACEMENT OF THE PRESSURIZED FILL-
ER CAP
1. Remove the pressurized cap from the expansion tank.
2. Install a new pressurized plug on the expansion tank.
DANGER!
Do not remove the heat exchanger cap when the coolant
temperature is too high. Then loosen the cap slightly to
release residual pressure before removing it completely.
CAUTION!
Close the heat exchanger cap carefully. If the cap is loose
or not properly closed, coolant may leak out and cause
the engine to overheat.
CAUTION!
The pressure cap should be replaced every 2 years or 500
hours, whichever comes first.