RD 27 Maintenance
wc_tx000815gb.fm 93
5.38 Replacing the Water Temperature Regulator
Prerequisites
Machine shut down
Engine cool
When
Every 3000 hours of service or every 2 years
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Procedure
Follow the procedure below to replace the water temperature regulator.
Removal
Follow the procedure below to remove the water temperature regulator.
1. Open the engine compartment.
2. Drain and clean the engine cooling system. See section Changing the Cooling
System Coolant. The water temperature regulator should be replaced while the
coolant system is completely drained.
3. Remove the housing (a) for the water temperature regulator.
4. Remove the gasket and remove the water temperature regulator.
Installation
Follow the procedure below to install the water temperature regulator.
Note: Water temperature regulators may be reused if they are within test specifica-
tions, are not damaged, and are free of excessive deposit buildup.
1. Install a new water temperature regulator and install a new gasket.
NOTICE: If the water temperature regulator is installed incorrectly, it will cause the
engine to overheat.
2. Install the housing for the water temperature regulator.
3. Add coolant to the radiator. See section Changing the Cooling System Coolant.
4. Install the radiator filler cap.
WARNING
Burn hazard. At operating temperature, engine coolant is hot and under pressure. It
can cause severe personal injury.
f Check the coolant level only after the engine has been shut down and is cool.
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