Operating instructions

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.