OPM 100 en-GB 74
© Scania CV AB 2023, Sweden
Cooling system
Changing the coolant and
cleaning the cooling system
Draining coolant
Do not open the coolant filler cap in the expan-
sion tank if the engine is hot. Hot coolant and
steam may spray out and cause burns. If the cap
has to be opened do it slowly to release the pres-
sure before removing the cap.
Use protective gloves as coolant can cause irrita-
tion if it comes in contact with the skin.
Use a suitable container. Used coolant must be
disposed of as specified in national and interna-
tional laws and regulations.
Draining coolant with coolant pump
Special tools
1. Open the expansion tank cap.
2. Place the hose from the coolant pump in an
empty container.
Number, designation Illustration
2 443 679, coolant
pump
3. Connect the pump to the draining nipple in
the cylinder block. See illustration.
4. Connect the pump’s 2 cable terminals to the
battery’s negative and positive terminal.
Make sure that the drainage starts. If the
drainage does not start: Change the position
of the cable terminals.
5. Repeat the procedure at the cooling system's
lowest drainage point. The location of the
lowest drainage point on the engine may dif-
fer depending on engine application.
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