User Manual

N40469 Chapter 5
Page 27
How to drain the coolant circuit
Warnings!
• Discard the used coolant in a safe place and in
accordance with local regulations.
• Do not drain the coolant while the engine is still
hot and the system is under pressure because
dangerous hot coolant can be discharged.
1. Remove the coolant ller cap (gure 2 item 1).
2. Remove the drain plug (gure 3 item 1) from the
heat exchanger.
3. After the system has been drained, t the ller cap
and the drain plug.
4. Fasten a label in a suitable place to indicate that
the coolant system has been drained.
Caution: The closed circuit system cannot be drained
completely. If the coolant is drained for engine
preservation purposes or for protection from frost, the
coolant system must be lled again with an approved
antifreeze mixture.
Engines tted with keel coolers
The coolant capacity and the method used to drain
the coolant circuit of an engine connected to a keel
cooler will vary in different applications.
Use the instructions given by the keel cooler
manufacturer to drain and renew the engine coolant if
a keel cooler is tted.
Figure 2
Figure 3