Power Steering — Bleeding

Changing the working fluid

Hang the front wheels of the car and place safety stands under the car.

Disconnect the return hose from the reservoir of the booster hydraulic system and close the reservoir fitting with a stopper.



Connect an additional hose to the return hose and drain the hydraulic fluid into a suitable container (5.10).

Disconnect the high voltage wires from the ignition coils.

To completely drain the working fluid, turn the engine crankshaft with several short-term starter starts while constantly turning the steering wheel to the left and right until it stops.

Connect the return hose to the tank and secure it with a clamp.

Fill the reservoir of the booster hydraulic system with the recommended fluid.

Recommended working fluid: PSF-3.

Filling capacity approx.: 1 l.

Start the engine.

Check for fluid leaks from the hose connections, then stop the engine.

Fill the tank with the recommended liquid to the lower position of the tank filter.

Bleed air from power steering hydraulic system.

Removal of air from the hydraulic system of the power steering

Fill the reservoir of the booster hydraulic system with the recommended fluid up to the mark «MAX».


Hang the front wheels of the car.

Disconnect the high voltage wires from the ignition coils. Scroll the engine crankshaft with several short-term starts of the starter while constantly turning the steering wheel to the left and right until it stops five or six times within 15-20 seconds.

Note. During the removal of air, it is necessary to constantly add liquid and make sure that its level does not fall below the lower position of the filter.

Note. If air is removed while the engine is running, air will be sucked in and it will enter the working fluid. Therefore, remove air from the hydraulic system only when turning the crankshaft of the engine with a starter.

Connect the high voltage wires to the ignition coils, then start the engine and let it idle.

Turn the steering wheel from lock to lock until the air bubbles in the reservoir of the booster hydraulic system disappear.

Note. Do not hold the steering wheel in the extreme position (turned all the way) more than 10 s.

Make sure that the working fluid is clear, without turbidity, and its level in the tank is between the marks «MAX» And «MIN» on the wall of the tank.




Check for a slight change in the fluid level in the reservoir when turning the steering wheel left and right (pic. 5.9).

Note. If the liquid level changes by more than 5 mm, then it is necessary to bleed 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.

Power steering pump pressure test

Disconnect the pressure hose from the power steering pump. Connect the special tools between the pressure hose and the power steering pump, as shown in Figure 5.11.

Bleed air from power steering hydraulic system. Then start the engine and, with the vehicle stationary, turn the steering wheel several times to raise the fluid temperature to approximately 50°C.


Set the engine operation mode to 1000 min^–1.

Fully close the shut-off valve on the measuring pressure gauge, measure the power steering pump supply pressure and check that it corresponds to the nominal value.

Pump feed pressure (nominal value): 7600–8100 kPa.

Attention! The cut-off valve on the measuring pressure gauge should not be left closed for more than 10 seconds.

Disconnect the special tools, connect the injection hose and tighten the hose fittings to the specified tightening torque of 55–69 Nm.

Bleed air from power steering hydraulic system.