Doosan DA40 - Cleaning the Cooling System

SHOP MANUAL
Engine
Ch 1 page 186
Cleaning the Cooling System
Clean the cooling system more often if necessary.
NOTE
Do not use caustic soda or other alkaline cleaning agent as this could
damage the aluminium.
NOTE
Cleaning the Radiator and Charge Air cooler (Outer)
1. Check that the radiator and the charge air cooler are not
clogged on the air side and that the cooling fins are not
damaged.
2. Carefully scrape away any deposits from the radiator
cooling fins. Use a paraffin-based engine cleaner if
necessary.
3. Carefully straighten bent cooling fins using a steel brush or
similar.
To ensure proper handling of cooling system detergent, study the
warning text on the package
Removing Oil and Grease (Inner)
1. Run the engine until it has reached operating temperature
and then drain the cooling system.
2. Remove the thermostats.
3. Fill the system with clean, hot water mixed with liquid
dishwasher detergent intended for household appliances.
Concentration 1%.
4. Run the engine until it has reached operating temperature
for approximately 20-30 minutes. Remember to switch on
the cab heating system, if one is installed.
5. Drain the cooling system.
6. Refill the system with clean hot water and run the engine
for about 20-30 minutes.
7. Drain the water from the system.
8. Refit the thermostats.
9. Fill the system with new coolant following the specification
under Coolants earlier in the document.
WARNING
Avoid spillage and use a suitable container. Used coolant must be
disposed of as specied in national and international law.
NOTE