H21 STEERING WHEEL OSCILLATIONS/ VIBRATIONS / WITH THE VEHICLE STATIONARY - Alfa - 166 - eLearn

3308646 - H21 STEERING WHEEL OSCILLATIONS/ VIBRATIONS / WITH THE VEHICLE STATIONARY

With the engine running and the vehicle stationary, the steering wheel oscillates and vibrates

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check the tyre inflation pressurePreliminarily check the engine idle speed	Continue to Step 1	Engine idle irregular	See table D10
		Continue to Step 1	Tyre inflation pressure not correct	Restore the tyre inflation pressure
1	ENGINE SUPPORT CHECK	All OK	Problems met	Operation
	Check the condition of the engine supports and reaction rod	Continue to Step 2	Engine supports faulty	Loosen the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008A)
	Check the condition of the engine supports and reaction rod	Continue to Step 2	Reaction rod faulty	Bed in the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008C)
2	STEERING COLUMN CHECK	All OK	Problems met	Operation
	Check the condition and the efficiency of the steering column support. In particular, check: that there is no clearance between the support bushes and the steering column that the steering column joints are correctly tightened	Continue to Step 3	Bushes worn or damaged	Restore the efficiency of the steering column If necessary, replace the bearings involved Op. 4110A30
		Continue to Step 3	Spider joint clearance too large	Tighten the bolts or replace the steering column Op. 4110A30
3	STEERING WHEEL ADJUSTMENT DEVICE CHECK	All OK	Problems met	Operation
	Check the condition of the steering wheel adjustment device In particular, check: that the clearance between the device and the steering column is correct	Continue to Step 4	Coupling with excessive clearance	Restore the efficiency of the steering wheel adjustment device. If necessary, replace it
4	CHECKING TIMING	All OK	Problems met	Operation
	Check that the engine timing is correct	Continue to Step 5	Timing not correct	Restore the correct engine timing Op. 1032B14
5	FLYWHEEL BALANCE CHECK	All OK	Problems met	Operation
	Check that the flywheel balance is correct	Continue to Step 6	Balance not correct	Replace the flywheel Op. 1024B10
6	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'