Kohler KDW 2204 - Expansion Tank And Cap; Checking For Cooling System Leaks; Coolant Circulating Pump; Thermostat

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Expansion tank and cap
The expansion tankis separatedfrom theradiator andis tted
withacoolantllcap.
Thecapcomeswithvacuumvalve1andpressurereliefvalve2.
Thepressurereliefvalveopensatapressureof0.7bar.
Thermostat
1-Airvalve
Specications:
Openingtemperature:77°/81°C
Max.strokeat94°C=7.5mm
Coolantowratewiththermostatandvalveinclosedposition=
15Liters/h.
Checking for cooling system leaks
Remove the cap from the expansion tank and check coolant
level.
Replace the cap with one tted with portable hand air pump
couplingasshowninthegure142.
Compressairatapressureof1barforapproximately2minutes.
Checkthatnoleaksoccur.
Caution – Warning
In very dusty working conditions verify and clean the
outside of the radiator frequently.
 Replacecoolantasspeciedonpage22.
Cooling system
Workshop Manual KDW 1603_2204_2204/T _ cod. ED0053029180 - 1° ed_rev. 00
Coolant circulating pump
Impeller3andhub5arettedtotheshaftbypresst.
Toremovetheimpeller,screwtheM18x1.5boltintobore2.
Toremovethatshafttake4whichlocksthebearingtothepump
body.Asealislocatedontheshaftbetweenthebearingandthe
impeller.
Incaseofworn-outseal,coolantleaksfromhole1.
KDW 1603 - 2204:
Theratiobetweenthepumpandenginerpm=1:1.2
Pumpdeliveryat3000rpmis70liters/min.
KDW 2204/T:
Theratiobetweenthepumpandenginerpm=1:1.5
Pumpdeliveryat3000rpmis116liters/min.