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7.17.3 Engine coolant – Draining
Preconditions
☑
Engine is stopped and starting disabled.
WARNING
Coolant is hot and highly pressurized.
Risk of injury! Risk of scalding!
• Allow engine to cool down.
• Wear protective clothing, protective gloves, and safety glasses / facial protection.
Preparatory steps
1.
Provide a suitable container to collect the coolant.
2.
Switch off preheating unit (external).
Engine coolant – Draining
1.
Provide a suitable container to collect the coolant.
2.
Turn cover on coolant expansion tank counterclockwise until the first stop and allow pressure to es-
cape.
3.
Continue to turn cover counterclockwise and remove.
4.
Extract remaining engine coolant in the coolant expansion tank via the filler neck.
5.
Drain engine coolant at preheating unit (ex-
ternal).
6.
Open drain valve (2) and drain engine cool-
ant at elbow on engine coolant pump.
7.
Open drain valves (1) on A and B side of
crankcase and drain engine coolant.
Note:
With the air compressor (optional) installed
at the drain point (A side), the drain valve is
inaccessible.
8.
Open supply hose at air compressor.
MS150120/00E 2014-11
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