Nanni N5.150, Руководство оператора

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68
S08 MAINTENANCE
REMOVING AND INSTALLING THERMOSTATS
1. Visually inspect area around thermostat housing and
cover for leaks.
2. Remove coolant tank pressure cap and partially drain
coolant system.
3. Remove cap screws ( A ), nut ( B ) and washer ( C )
attaching coolant cover ( D ) with sealing O-ring ( E ) to the
thermostat housing ( G ) and exhaust manifold.
4. Remove cap screws ( F ) attaching thermostat housing
to the exhaust manifold.
5. Remove thermostat housing with gasket ( I ). Remove
and discard all gasket material. Clean all sealing
surfaces.
6. Inspect and test thermostats for proper opening
temperature.
7. Install thermostats with a new gasket and pilot
housing on stud ( J ). Install thermostat housing cap
screws finger tight.
8. Inspect thermostat cover sealing O-ring and replace
if necessary. Install thermostat cover with O-ring, cap
screws, washer, and nut. Tighten nut and all cap screws
to the following specifications : 35 Nm (25 lb.-ft.).
TESTING THERMOSTATS
1. Remove thermostats.
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.
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
acontainer of water.
5. Stir the water as it heats. Observe opening action
of thermostat and compare temperatures with
specifications.
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.
7. If any one thermostat is defective, replace both
thermostats.
Thermostat and thermometer in water