Lombardini LDW 502, Руководство по обслуживанию

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service manual
mod. 051135
8
Important
Replacement may be carried out with the
engine installed on the machine.
1 - Switch off the engine and leave to cool.
2 - Disassemble the cooling fan (see
“Removing the cooling fan belt drive”)
.
3 - Disassemble the timing belt drive (see
“Removing the timing belt drive”)
.
4 - Disassemble the coolant pump .
5 - Install a new pump and tighten the
screws to a torque of
20 Nm.
Important
Following a failure, the coolant pump cannot be
repaired and must be replaced with an original spare.
Important
Replacement may be carried out with the
engine installed on the machine.
1 - Switch off the engine and leave to cool.
2 - Remove the cover.
3 - Remove the valve and make sure it is
working properly.
Important
The valve must be heated in order to check
weather it is functioning correctly.
- Dip the thermostatic valve in a metal
container of water.
- Use a thermometer with a full scale of
150°C to monitor the temperature of the
water in the container.
- Heat the water and, using the thermometer, make
sure that the temperature at which the valve begins
to open is between 78 and 82°C.
- If the thermostatic valve opens at a different
temperature, it must be replaced.
- Maintaining the conditions described above, heat
the water to 94°C and check whether or not the valve
is completely open at this temperature, i.e. that it
has lifted to 7mm.
8.10 REPLACING THE COOLANT PUMP
8.11 REPLACING THE THERMOSTATIC VALVE
Coolant pump
cover
thermostatic valve
spring
- Check whether the valve is completely shut once it
has cooled down.
If the length does not correspond to the value shown, replace
the valve spring with an original spare.
4 - Mount the cover and fasten the screws.
REPLACING PARTS