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KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_
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Radiator and compensation, check and seal tank cap.
Remove the cap from compensation tank cap and check that
the liquid is at the correct level.
Replace the cap with a new one provided with hand air pump
socket.
Compress air at a pressure of 1 bar for about two minutes.
Check that there are no drips in the radiator.
The tank cap is supplied with a vacuum relief valve 1 and an
overpressure valve 2.
Overpressure valve opening pressure of 0.7 bar.
Coolant circulation pump, components
1 Rotor
2 Front seal gasket
3 Pump casing
4 Exhaust hole
5 Bearing
6 Pulley
7 Shaft
Note: The pump for KDW 1404 engines is different from the
one of the other series (fig. 148) due to the presence of a
ring between rotor 1 and gasket 2.
Thermostatic valve
1 - Stainless steel or brass casing
2 - Wax bulb
3 - Air relief hole
Characteristics:
Opening temperature:..........83°÷87°C
Max stroke at: ......................94°C = 7 mm
Liquid recycling: ...................30÷80 l/h.
9
Coolant circuit
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