MTU MW15406/17E, Operating Instructions Manual

Page: 205 / 241

7.16.7 Engine coolant – Sample extraction and analysis
Preconditions
☑
Engine is stopped and starting disabled.
☑ MTU Fluids and Lubricants Specifications (A001061/..) are available.
Special tools, Material, Spare parts
Designation / Use Part No. Qty.
MTU test kit
5605892099/00 1
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.
Engine coolant sample extrac-
tion and analysis
1. Turn breather valve of filler neck on coolant
expansion tank counterclockwise to 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 expansion tank and dispose of oil.
4. Draw off approx. 1 liter coolant and drain
into a clean container.
5. Using the equipment and chemicals from
the MTU test kit, examine coolant for:
• antifreeze concentration;
• corrosion inhibitor concentration;
• pH value.
6. Position breather valve on filler neck and
close.
7. Change engine coolant according to the
coolant operating times specified in
(→ MTU Fluids and Lubricants Specifica-
tions A001061/..)(→ Page 202).
MW15406/17E 2014-05
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