11.3.2. Removal of air from hydraulic system (prorolling)
If during short-term start-up of the engine liquid level does not fall any more the engine can to be switched off.
For prorolling it is necessary to execute following operations:
- Quickly some times to turn a steering wheel from an emphasis against the stop, to supersede air from the cylinder. Thus it is not necessary to detain for a long time a steering wheel in extreme positions;
- To observe of liquid level in a tank. If it falls, immediately to add a liquid.