Procedure To Drain Cooling System; Procedure To Flush And Clean Cooling System; Procedure To Refill Cooling System - Kohler Decision-Maker 3000 Operation

3.8.3 Procedure to Drain Cooling
System
For optimum protection, drain, flush, and refill the
cooling system at the intervals listed in the service
schedule.
Note: Dispose of all waste materials (oil, fuel, coolant,
filters, and gaskets) in an environmentally safe
manner.
1. Deenergize the block heater, if equipped.
2. Remove the pressure cap to allow the entire
system to drain and prevent air pockets from
restricting coolant flow through the engine block.
3. Open the radiator and/or engine block coolant
drain valve(s) and allow the system to drain.
4. If the inside of the radiator has mineral deposits or
the used coolant contains dirt or grease, refer to
Section 3.8.4, Procedure to Flush and Clean the
Cooling System. If the cooling system does not
have mineral deposits, go to Section 3.8.5,
Procedure to Refill the Cooling System.
3.8.4 Procedure to Flush and Clean
Cooling System
Use the instructions in the engine operation manual
when available to flush and clean the cooling system.
Otherwise, use the following procedure and the cooling
system cleaner manufacturer's instructions.
1. Flush the cooling system with clean water.
2. If the inside of the radiator still has mineral
deposits, use a radiator cleaner to remove the
remaining deposits following the manufacturer's
instructions.
3. Drain, clean, and flush the coolant recovery tank.
3.8.5 Procedure to Refill Cooling
System
See the generator set spec sheet for coolant capacity.
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 the
engine has cooled.
1. Remove the pressure cap.
2. Close the radiator and/or engine block coolant
drain valve(s) and tighten the cooling system hose
clamps.
56 Section 3 Scheduled Maintenance
3. Open the air-bleed petcocks, if equipped. Close
the air-bleed petcocks when coolant begins to flow
from them.
4. Add coolant additives or water pump lubricants
according to the
recommendations in the engine operation manual.
5. Fill the cooling system with the recommended
coolant/antifreeze mixture of 50% ethylene glycol
and 50% clean, softened water to inhibit
rust/corrosion and prevent freezing.
A coolant solution of 50% ethylene glycol provides
freezing protection to --37°C (--34°F) and
overheating protection to 129°C (265°F).
coolant solution containing less than 50%
ethylene glycol may not provide adequate
freezing and overheating protection. A coolant
solution containing 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. Refer to the
engine operation manual for recommendations
regarding the coolant mixture to use in extreme
temperatures.
6. Replace the pressure cap.
7. Fill the coolant recovery tank to the low mark.
8. Operate generator set until the thermostat opens
when the upper cooling system hose warms.
9. Stop the engine and allow it to cool.
10. Check and repair any coolant leaks.
11. Remove the pressure cap.
12. Add coolant to bring the coolant level to just below
the overflow tube opening of the filler neck.
13. Replace the pressure cap.
14. Maintain the coolant level in the coolant recovery
tank between the high and low marks.
Air pockets often form in the engine water jacket
when the coolant system is refilled. Check the
coolant level in the coolant recovery tank after each
generator set operation and add coolant as
necessary until the coolant level stabilizes. Then
check the coolant at the interval specified in the
service schedule.
15. Reenergize the block heater, if equipped.
engine manufacturer's
A
TP-6694 7/11