803166A00 Mercury DECAL SET, (Black 125 - Blue)

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 the plugs after air has been purged from the cooling system.
Start the engine.
Check the coolant level. Maintain the coolant to the proper level on the sight gauge (if equipped). If a sight gauge is not equipped, maintain the coolant within 13 mm (0.5 inch) below the bottom of the filler pipe.
Check the coolant level. Maintain the coolant to the proper level on the sight gauge (if equipped). If a sight gauge is not equipped, maintain the coolant within 13 mm (0.5 inch) below the bottom of the filler pipe. Refer to Operation and Maintenance Manual, "Coolant Level - Check".
Clean the cooling system filler cap. Inspect the gaskets of the cooling system filler cap. If the gaskets of the cooling system filler cap are damaged, discard the old cooling system filler cap and install a new cap. If the gaskets of the cooling system filler cap are not damaged, use a 9S-8140 Pressurizing Pump in order to test the cap. The correct pressure is stamped on the face of the cooling system filler cap. If the cooling system filler cap does not maintain the correct pressure, install a new cooling system filler cap.
Inspect the cooling system for leaks and for proper operating temperature.