Procedure To Refill Cooling System - Kohler KD2000 Operating Instructions Manual

3.8.6 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.
3. Fill the cooling system with the recommended
coolant/antifreeze mixture based on the engine
manufacturer's recommendation.
4. Fill the coolant expansion tank to the middle of the
sight glass.
5. For models KD2000- -KD3250, use the manual
engine venting ports to bleed trapped air from the
system. Refer to the engine operation manual for
the venting locations on the water pumps,
thermostat housing, and engine block. See
Figure 3-14.
Note: To open the venting ports, thread the venting
tool into the port.
1. Manual engine venting ports, typical
Figure 3-14 Engine Coolant Venting or Bleeding,
KD2000--KD3250
TP-7070 7/18
6. Leave the radiator cap off and run for 5 minutes
with no load.
7. Stop the engine and allow it to cool.
8. Check and repair any coolant leaks.
9. Add coolant to bring the coolant level to just below
the overflow tube opening of the filler neck.
10. Replace the pressure cap.
11. Operate generator set until the thermostat opens
when the upper cooling system hose warms.
12. Maintain the coolant level in the coolant expansion
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 expansion 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.
13. Reenergize the block heater, if equipped.
1
Section 3 Scheduled Maintenance 87