Operating instructions

  40 Cooling System, General, HT Circuit

Filling coolant with pump

1. Connect appropriate pump with hose to drain

valve.

2. Open drain valve and pump treated coolant into

engine, until coolant level reaches lower edge of

cast-in eye or marking plate on filler neck.

3. Close drain valve.

4. Disconnect pump and hose.

Filling coolant through filler neck

1. Alternatively: Fill coolant though filler neck on coolant expansion tank until level reaches cast-in eye or marking

plate.

2. Check proper condition of breather valve, 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  41)and top up, if required.

6.15.2 Engine coolant draining

Preconditions

 Eng

ine is stopped and starting disabled.

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.

Preparatory steps

1. Provide an appropriate container to drain the coolant into.

2. Switch off preheating unit.