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8.17.3 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 a suitable receptacle to catch the coolant.
2.
Switch off preheater.
Draining engine coolant
1.
Turn valve cover on filler neck of expansion tank counterclockwise to first stop and allow pressure to escape.
2.
Continue to turn valve cover counterclockwise 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:
• Elbow of the engine coolant pump (2)
• Crankcase, left and right side (1)
• On tee under flywheel housing
• At preheater
5.
Tighten drain valves on elbow of engine coolant pump (2) and on crankcase (1) to specified torque using a
torque wrench.
Name
Size
Type
Lubricant
Value/Standard
Spindle
A/F11
Tightening torque
12 Nm
Final steps
1.
Close all remaining open drain points.
2.
Position valve cover on filler neck and close.
244 | Coolant System, General, High-Temperature Circuit | MS150123/01E 2017-05
TIM-ID: 0000073243 - 002