7.15.3 Engine coolant – Draining
Preconditions
☑ Engine is stopped and starting disabled.
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
Preparatory steps
1.
Provide an appropriate container to drain the coolant into.
2.
Switch off preheating unit.
Engine coolant – Draining
1.
Turn breather valve of filler neck on coolant
expansion tank counterclockwise to first
stop and allow pressure to escape.
2.
Continue to turn breather valve counter‐
clockwise and remove.
3.
Draw off separated corrosion inhibitor oil in
expansion tank through the filler neck.
4.
Open drain valves and/or drain plugs and
drain coolant at the following points:
• At preheating unit;
• At HT coolant pump elbow;
• On crankcase, left and right side.
5.
Close all open drain points.
6.
Set breather valve onto filler neck and close
it.
M015675/05E 2011-10 | Task Description | 107
TIM-ID: 0000000936 - 003
