LEVER 2L9253 - 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
Do not change the coolant until you read and understand the material in the Cooling System Specifications section.
Drain the coolant earlier whenever the coolant is dirty or foaming is observed. 1. Remove radiator cap (1) slowly to relieve pressure.2. Open drain valve (2) and allow the coolant to drain.3. Close drain valve (2). 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 (2).7. Add the coolant solution. See Cooling System Specifications and Lubricant Viscosities and Refill Capacities. Do not add supplemental 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 radiator cap (1) 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 radiator cap (1).11. Stop the engine.Clean the Cooling System Relief Valve
1. Remove radiator cap (1) slowly to relieve pressure.2. Clean or replace relief valve (2) if the system overheats or loss of coolant is observed.3. Install the relief valve assembly.4. Check the coolant level. Maintain the coolant level to within 13 mm (.5 in) of the bottom of the fill pipe.5. Install radiator cap (1).