BOLT 7X0423 - Caterpillar

Use only clean water to flush the cooling system when Extended Life Coolant (ELC) is drained and replaced.Drain the Cooling System
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Stop the engine and allow the engine to cool.
Ensure that pressure has been relieved from the cooling system.
Illustration 1 g02848318
(1) SCAC sampling port and drain plug
(2) Jacket water sampling port
(3) Jacket water drain plugs
(4) Jacket water drain valves
(5) SCAC drain plugs
Open the cooling system drain valves (if equipped). Remove the cooling system drain plugs. Allow the coolant to drain.
Dispose of used engine coolant properly or recycle. Various methods have been proposed to reclaim used coolant for reuse in engine cooling systems. The full distillation procedure is the only method acceptable by Caterpillar to reclaim the used coolant.
For information regarding the disposal, recycling, and parts that are required to drain the coolant, consult your Cat dealer or Cat Dealer Service Tools Group:Outside Illinois 1-800-542-TOOL
Inside Illinois 1-800-541-TOOL
Canada 1-800-523-TOOL
Clean the Cooling System
After the cooling system has been drained, flush the cooling system with clean water in order to remove any debris.
Close the cooling system drain valves (if equipped). Remove hose, the adapter, and a connector. Install O-rings (if equipped). Clean the drain plugs and install the drain plugs.
Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
Fill the cooling system with clean water. Install the cooling system filler cap. Operate the engine until the temperature reaches 49 °C (120 °F) to 66 °C (150 °F).
Stop the engine and allow the engine to cool. Ensure that the engine will not start when the cooling system is drained. Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap.
Open the cooling system drain valves (if equipped). If the cooling system is not equipped with drain valves, remove the drain plugs. Allow the coolant to drain. Flush the cooling system with clean water. Close the cooling system drain valves (if equipped). Install the drain plugs.
Repeat Steps 3,4 and 5. Fill the Cooling System
Fill the cooling system no faster than 19 L (5 US gal) per minute to avoid air locks.
Illustration 2 g02565816
(2) Jacket water vent
Illustration 3 g02565836
(1) SCAC vent
(2) Jacket water vent
(3) Coolant bypass vent
Fill the cooling system with Extended Life Coolant (ELC). See the Operation and Maintenance Manual, "Refill Capacities and Recommendations" for the correct cooling system capacity. Do not install the cooling system filler cap.
Ensure that an active vent is installed on the coolant bypass line at the turbocharger for the Jacket Water system (3). Also, ensure that an active vent is installed on the vent port for the Jacket Water system (2) 3.
Ensure that the SCAC vent plugs (1) are loosened prior to filling.
Fill the cooling system with an antifreeze/coolant solution. Do not install the cooling system filler cap.
Tighten