Technical data

Cooling S ystem, General, HT Circuit 6–43

6.15 Cooling System, General, HT Circuit

6.15.1 Engine coolant filling

Preconditions

• Engine is stopped and starting disabled.

• MTU Fluids and Lubricants Specification (A001061/..) is available.

Material

Designation / Use Part No. Qty.

Engine coolant

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.

CAUTION

Cold coolant in hot engine can cause thermal stress.

Formation of cracks in components!

• Fill / top up coolant only into cold engine.

Preparatory steps

1. Turn breather valve on coolant expansion tank

counterclockwise to first stop and allow pressure

to escape.

2. Continue to turn breather valve counterclockwise

and remove.

Engine coolant filling

1. Fill coolant through filler neck on expansion tank or through filling line until coolant level reaches lower edge of

cast-in eye or marking plate.

2. Ch

eck proper condition of breather valve and clean sealing faces, if required.

3. Set breather valve onto filler neck and close it.

Final steps

1. Start the engine and operate it at idle speed for some minutes.

2. Check coolant level (→ Page 6 – 46) and top up, if required.