Table of Contents
Advertisement
8.10 REPLACING THE COOLANT PUMP
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.
8.11 REPLACING THE THERMOSTATIC VALVE
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.
- Check whether the valve is completely shut once it
has cooled down.
Service Manual LDW FOCS 502 automotive _ cod. ED0053027270 - 3° ed_rev. 02
REPLACING PARTS
Coolant pump
155
cover
thermostatic valve
156
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.
8
spring
91
Advertisement
Table of Contents
