Start the engine. With the vehicle stationary, make several turns of the steering wheel in a row so that the temperature of the working fluid increases to approximately 50-60°C.
With the engine idling, make several turns of the steering wheel to the right and left until it stops.
Check for cloudiness or foaming in the booster hydraulic reservoir.
Pic. 5.9. The difference in fluid levels in the hydraulic booster reservoir before and after the engine is installed
Check the magnitude of the difference in fluid levels in the reservoir of the hydraulic system of the booster with the engine running and not running (pic. 5.9).
Note. If the liquid level changes by more than 5 mm, it is necessary to remove air from the booster hydraulic system again. If the fluid level rises sharply after stopping the engine, then the air from the hydraulic system is not completely removed. If air is not completely removed from the power steering hydraulic system, extraneous rattling noises from the power steering pump and fluid flow control valve occur, which leads to a reduction in the life of the pump and other elements of the hydraulic system.