Technical data

6–50 Cooling System, LT Circuit

6.16.2 Charge-air coolant – Draining

Preconditions

• Engine is stopped and starting disabled.

Spare parts

Designation / Use Part No. Qty.

Sealing ring

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.

Charge-air coolant – Draining

1. Provide an appropriate container to drain the

coolant into.

2. Turn breather valve of filler neck on coolant

expansion tank counterclockwise to first stop

and allow pressure to escape.

3. Continue to turn breather valve counterclockwise

and remove.

4. Draw off precipitated corrosion inhibitor oil from

the expansion tank through filler neck.

5. Open drain plugs and drain coolant at the

llowing points:

• at the LT cooling pump;

•atthe

coolant line (customer’s equipment).

6. Draining of residual coolant:

• at charge-air cooler.

7. Screw in dr

ain plugs with new sealing rings.

8. Fit breather valve onto filler neck and close it.