Geko 12V 4000 G 41, Operating Instructions Manual

Page: 99 / 124

Cooling System, General, HT Circuit 41
Engine coolant draining
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 counterclockwise
and remove.
3. Draw off precipitated corrosion inhibitor oil from
the expansion tank through filler neck.
4. Open drain cocks and drain plugs and drain
coolant at the following points:
Preheating unit;
HT coolant pump elbow;
Crankcase, left and right side.
5. Seal all open drain points.
6. Set breather valve onto filler neck and close it.
6.15.3 Engine coolant change
Material
Designation / Use Part No. Qty.
Coolant FLS
Drain engine coolant ( Page 6 40) .
Fill engine coolant system ( Page 6 39) .
6.15.4 Engine coolant-level check
Preconditions
Engine is stopped and starting disabled.
MTU Fluids and Lubricants Specification (A001061/..) is available.
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.
M015403/00E 02-09 © MTU
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