24. SERVICE PROCEDURE 24.1.5 CLEANING THE SYSTEM At 4,000 hours or after two years of service, whichever comes first, clean the cooling system as follows: 1. Drain the system into a suitable container. Refer to “DRAINING THE SYSTEM”. 2. Drain and clean the reserve tank. 3. Close the radiator and crankcase drains. REMARK: Be sure to close the cab heater water valves, if equipped, before any flushing compounds are circulated through the cooling system. This is to prevent particles of corrosion nor mally loosened by flushing compound, from plugging the small passages of the heater core.
Fill the system with clean water, refer to “FILLING THE SYSTEM” and add a flushing compound that is compatible with aluminium. Flush the system in accordance with the instructions furnished with the compound. After flushing, rinsing and completely draining the system, open the cab heater water valves, if equipped. Refill with clean coolant. Refer to “FILLING THE SYSTEM”. 24.1.6 FILLING THE SYSTEM REMARK: Be sure to fill the heater and heater supply lines with fresh coolant, even if the heater is not in use (warm weather). Leaving the heater core empty causes corrosion in the heater. 1. Be sure the radiator drain valve and crankcase drain plugs are closed and tightened.
Open the cab heater water valves, if equipped. mnkann012 Fill the cooling system to maximum capacity. Fill with antifreeze and change the coolant filter. Open the after-cooler air drain valves @ and add coolant until it overflows from the water filler. When the coolant comes up to near the water filler port, close the after-cooler air drain valve.For coolant specifications — SEE “20 COOLANT SYSTEM” on page 3-12. Start engine and run until normal operating temperature is reached. Add coolant when needed to keep proper level in reserve tank. Atter all air is removed Cap.
and level remains fixed, install the radiator Fill the radiator reserve tank with coolant until level is between the 3-30 LOW markings on the tank. PC160/180/200-6k-ENG FULL and