H21 STEERING WHEEL OSCILLATIONS/ VIBRATIONS / WITH THE VEHICLE STATIONARY - Alfa - 147 - eLearn

1	CHECK ON RIMS AND TYRES	All OK	Problems met	Operation
		Results of the tests
	Check the tyre inflation pressureCheck the condition of the tyresCheck that the rims are not distortedNo clearance in the steering linkage	Continue to Step 2	Pressure not correct	Restore:
			Abnormal tyre wear	Replace
			Rims distorted	Replace
			Clearance	Replace the components involved
2	CHECK ON VIBRATIONS AT LOW SPEED	All OK	Problems met	Operation
	Testing the vehicle at below 60 km/h, check: that there are no steering wheel vibrations that there is no surging of the car	Continue to Step 3	Steering wheel vibration (shimmy) rim - tyre deformation	Replace the deformed part
		Continue to Step 3	Tyre rim ovality	Replace the deformed part
3	CHECK ON VIBRATIONS AT MEDIUM-HIGH SPEED	All OK	Problems met	Operation
	Test the vehicle at medium-high speed	Continue to Step 4	Steering wheel vibration	Balance the front wheels
	Test the vehicle at medium-high speed	Continue to Step 4	Vibration under the calves	Balance the rear wheels
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'