7.15.3 Engine coolant – Draining
Preconditions
☑
Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Sealing ring
(→ Spare Parts Catalog)
Sealing ring
(→ Spare Parts Catalog)
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 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 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 engine coolant pump;
• At the crankcase, left and right sides;
• At oil heat exchanger.
5.
Close all open drain points.
6.
Place breather valve on filler neck and
close.
114 | Task Description | MS15018/02E 2013-09
TIM-ID: 0000000035 - 003
