ar2000s114206e

Bleed cooling system

Type ar · topic 20.00 · version 0105 · 2020-06-09

Applies to: Model 447 with engine 274, 622, 651 Model 448 with engine 274

Where it sits

Function group 1 Engine › 20 Engine cooling system › 20.00 General — Series 447 · Series 448 · Series 622 · Series 651

EinPAS 15 Engine › 15.25 Engine cooling system › 15.25.5 Coolant circuit, complete — Series 447 · Series 448 · Series 622 · Series 651

Also applies to engines/gearboxes: 274 ***

AR20.00-S-1142-06E

Bleed cooling system

Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Model

447 with engine 274, 622, 651

Model

448 with engine 274

1

Switch heater to maximum heating output and allow engine to warm up at average engine speed.

2

Continuously refill coolant until coolant level reaches marking in coolant expansion reservoir.

3

Once the coolant temperature reaches approx. 60 to 70 °C, close coolant expansion reservoir with cap.

Referenced documents