369977 - H01 VEHICLE DRIFT

The vehicle tends to drift to the left and/or the right whilst driving in a straight line

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: the condition of the tyres and inflation pressure; that the wheels rotate freely; visually inspect the underbody checking that there is no damage and the suspension components are working properly the condition of the suspension flexible mountings the condition of the steering components	Move on to Step	1. Irregular tyre wear	1. Replace the tyres and balance the wheels
			2. Wheels braked	2. Check the state of the bearings, hubs and calipers. If necessary, replace the components involved
			3.Presence of distortions	3. Replace the components involved
			4. Supports damaged	4. Replace the components involved
			5. Components damaged	5. Replace the components involved
1	WHEEL GEOMETRY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the front and rear wheel geometry	Move on to Step	1. Front geometry irregular	1. Restore the correct front geometry    See in Op. 4450A10 FRONT WHEEL GEOMETRY - Check using optical equipment - Includes front wheel toe-in adjustment if necessary
			2. Rear geometry irregular	2. Restore the correct rear geometry    See in Op. 4450A40 REAR WHEEL GEOMETRY - Check using optical equipment - Includes rear wheel toe-in adjustment if necessary
2	DRIFT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Test the vehicle along a straight line on a road surface in good conditions with no wind and check that there is no drift		The vehicle drifts	Swap the front wheels roundMove on to Step
3	DRIFT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Test the vehicle along a straight line on a road surface in good conditions with no wind and check that there is no drift		1. If the direction of the drift is reversed	1. Replace the front tyresMove on to Step
			2. The vehicle continues to drift in the same direction	2. Swap the rear wheels roundMove on to Step
4	DRIFT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Test the vehicle along a straight line on a road surface in good conditions with no wind and check that there is no longer any drifting	Move on to Step	1. If the direction of the drift is reversed	1. Replace the rear tyres
			2. The vehicle continues to drift in the same direction	2. Overhaul the differential unit    See in Op. 2110D10 Differential INTERNAL CASING - R.R. with manual gearbox removed - Includes dismantling and reassembly of the gearbox
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present