Cooling System; Checking - Kubota Z400-B Handbuch

COOLING SYSTEM
CHECKING
Fan Belt Tension
1. Measure the deflection, depressing the belt halfway
between the fan drive pulley and the AC dynamo pulley
at 98 N (10 kgf, 22 Ibs) of force.
2. If the measurement is not the specified value, loosen the
bolts and the nuts, and relocate the AC dynamo to adjust.
Therl'110stat Valve Openin",Temperature
1. Suspend the thermostat in the water by a string with its
end inserted between the valve and the seat.
2. Heating the water gradually, read the temperature when
the valve opens and leaves the string.
3. Continue heating and read the temperature when the valve
opens approx. 6 mm (0.236 in.).
4. If the measurement is not within the specified values, reo
place the thermostat.
80.5° to 83.5"C (176.9" to 182.3°F)
Opening at beginning
temperature specification below 95° C (203° F)
at 6 mm (0.236 in.) of em .' )
f'IJ(j'J
Radi<.t~or
Water Tighteness
1. Fill the radiator with water to the specified amount and
warm up the engine.
2. Set a radiator tester and raise the water pressure to the
13.7 kPa (1.4 kgf/cm2, 20 psi).
3. Check the radiator for water leaks.
4. For water leak from the pinhole, repair with the radiator
cement, and for other leaks, replace the radiator.
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