3022731 - S40 NOISE' FRONT / DRIVING IN A STRAIGHT LINE ON AN EVEN ROAD

With the vehicle moving along a straight, even road, there is a noise from the front, often accompanied by vibrations.As the speed of the vehicle increases, so too does the noise

		Results of the tests
0	PRELIMINARY CHECKS	All OK	Problems met	Operation
	tyre inflation pressuretyre wear	Continue to Step 1	Pressure not correct	Restore the pressure
			Tyres worn	Replace the tyres
1	ROAD TEST	All OK	Problems met	Operation
	Road test the vehicle on a straight, flat road increasing the speed until the fault occurs.Steer gently to the left and the right keeping the speed constant	Continue to Step 2	There are changes in the noise	Replace the wheel hub bearing on the side the noise is coming from
			There are no changes in the noise	See table   S20  GEARBOX DIFFERENTIAL UNIT NOISY'/
2	CORRECT OPERATION CHECK	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'