Kohler 10ERG 운영 매뉴얼 - 페이지 28
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3.8.2
Draining the Cooling System
The radiator contains a coolant drain valve to drain the
cooling system. When draining the coolant, remove the
radiator's pressure cap: this will allow the entire system
to drain and will prevent air pockets from forming and
restricting coolant passage to the block.
Note: Pay special attention to the coolant level. After
the coolant drains, allow time for complete refill of
the engine water jacket. Check the coolant level
as described earlier.
3.8.3
Filling the Cooling System
1. Close the radiator's coolant drain valve and tighten
the hose clamps.
Note: Do not add coolant to a hot engine. Adding
coolant to a hot engine can cause the
cylinder block or cylinder head to crack.
Wait until engine has cooled.
2. Fill the radiator with the recommended coolant
mixture of 50% ethylene glycol and 50% clean,
softened water to inhibit rust/corrosion and prevent
freezing.
Note: A coolant solution of 50% ethylene glycol
provides freezing protection to --37°C
(--34°F) and overheating protection to
129°C (265°F). A coolant solution with less
than 50% ethylene glycol may not provide
adequate
protection. A coolant solution with more
than 50% ethylene glycol can cause engine
or component damage. Do not use alcohol
or methanol antifreeze or mix them with the
specified coolant.
manufacturer's operation manual for engine
coolant specifications.
3. Replace the radiator's pressure cap.
4. Operate the engine until the thermostat opens and
the radiator upper hose becomes hot.
16 Scheduled Maintenance
freezing
and
overheating
Consult the engine
5. Stop the engine and allow it to cool.
6. Remove the radiator's pressure cap.
7. Add coolant to the radiator to just below the
overflow tube on the filler neck.
8. Replace the radiator's pressure cap.
9. Maintain the coolant level in the coolant overflow
bottle between the High and Low markings.
Note: Periodically check the coolant level by
removing the radiator's pressure cap. Do
not rely solely on the level in the coolant
overflow bottle. Add fresh coolant until the
level is just below the overflow tube opening.
3.8.4
Flushing and Cleaning
For optimum protection, drain, flush, and refill the
cooling system at the interval listed in the service
schedule.
Flushing and Cleaning Procedure
1. Remove the pressure cap and open the radiator's
coolant drain valve and let the system drain
completely. Remove the pressure cap to simplify
draining.
2. Drain, clean, and flush the coolant overflow bottle.
3. Flush the system with clean water.
4. Close the radiator's coolant drain valve.
5. Fill the system with the recommended coolant.
6. Replace the pressure cap.
3.8.5
Pressure Cap
The cooling system utilize a pressure cap to raise the
boiling point of the coolant, enabling higher operating
temperatures. If the cap leaks, replace it with a cap of the
same rating. Find the pressure cap rating in Figure 3-7.
TP-6334
9/04