7.12.4 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 preheating unit.
Engine coolant ‒ Draining
1.
Turn breather valve on coolant expansion
tank counterclockwise to the first stop and
allow pressure to escape.
2.
Continue to turn breather valve counter-
clockwise and remove.
3.
Draw off precipitated corrosion inhibitor oil
from the coolant expansion tank through
filler neck.
4.
Open drain valves and/or drain plugs and
drain coolant at the following points:
• At the preheating unit;
• At the HT coolant pump (3);
• At the crankcase (1) and (2), right side.
5.
Draining of residual coolant:
• At the crankcase (1) and (2), left side.
At the oil heat exchanger.
6.
Close all open drain points.
7.
Place breather valve on filler neck and
close.
MS150111/01E 2014-05
| Task Description | 83
TIM-ID: 0000043674 - 002
