MTU 12V4000C*5 series, Operating Instructions Manual

Page: 221 / 305

8.15.3 Engine coolant – Draining
Preconditions
☑ Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
Torque wrench 10–60 Nm
F30452769 1
WARNING
Coolant is hot and highly pressurized.
Risk of injury! Risk of scalding!
• Allow engine to cool down.
• Wear protective clothing, protective gloves, and safety glasses / facial protection.
Preparatory steps
1. Provide a suitable container to collect the coolant.
2. Switch off preheating unit (external).
Engine coolant – Draining
1. Provide a suitable container to collect the coolant.
2. Turn cover on coolant expansion tank counterclockwise until the first stop and allow pressure to escape.
3. Continue to turn cover counterclockwise and remove.
4. Extract remaining engine coolant in the coolant expansion tank via the filler neck.
5. Drain engine coolant at preheating unit (ex-
ternal).
6. Open drain valve (2) and drain engine coolant
at elbow on engine coolant pump.
7. Open drain valves (1) on A and B side of
crankcase and drain engine coolant.
Note: With the air compressor (optional) installed at
the drain point (A side), the drain valve is in-
accessible.
8. Open supply hose at air compressor.
MS15041/03E 2018-08 | Coolant Circuit, General, High-Temperature Circuit | 219
TIM-ID: 0000030760 - 006