LOOM 5P5983 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.Cooling System Coolant
Change Coolant/Clean System
At operating temperature, engine coolant is hot and under pressure.Steam can cause personal injury.Check coolant level only when engine is stopped and radiator is cool enough to touch with your hand.Remove filler cap slowly to relieve pressure.Cooling system conditioner contains alkali. Avoid contact with skin and eyes to prevent personal injury.
Do not change the coolant until you read and understand the material in the "Cooling System Specifications" section.All water is corrosive at engine operating temperature. Use either Caterpillar Cooling System Conditioner Liquid or the coolant conditioner element to treat either plain water or ethylene glycol antifreeze solution. Never use both liquid cooling system conditioner and the coolant conditioner element at the same time.Do not use Caterpillar Cooling System Conditioner or coolant conditioner elements with Downtherm 209 Full Fill Coolant.
Drain the coolant earlier whenever the coolant is dirty or foaming is observed. 1. Remove the radiator cap slowly to relieve pressure.2. Open drain valve (1) and allow the coolant to drain.3. Close drain valve (1). Fill the system with clean water and a 6 to 10% concentration of cooling system cleaner.4. Start and run the engine for 90 minutes. Stop the engine and drain the cleaning solution.5. Flush the system with water, with the engine stopped, until the draining water is clear.6. Close drain valve (1).7. Add the coolant solution. See "Cooling System Specifications and Lubricant Viscosities and Refill Capacities". Do not add supllemental coolant additive or change element at this time, unless you are not using Caterpillar Antifreeze which contains additive.8. Start the engine and operate it with the radiator cap off, until the thermostat opens and the level stabilizes.9. Maintain the coolant level to within 13 mm (.5 in) of the bottom of the fill pipe.10. Install the radiator cap.11. Stop the engine.