E03 CLUTCH VIBRATING OR JERKING - Alfa - 166 - eLearn

3308622 - E03 CLUTCH VIBRATING OR JERKING

The clutch pedal vibrates and 'jerks'. When released, the vehicle does not start smoothly, but jerks or vibrates

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check the engine idle speed	Continue to Step 1	Engine idle irregular	See table D10
1	CLUTCH PEDAL CHECK	All OK	Problems met	Operation
	Check the clutch pedal travel	Continue to Step 2	Pedal travel not correct	Restore the operation of the clutch pedal Op. 3330B26
2	ENGINE SUPPORT CHECK	All OK	Problems met	Operation
	Check the condition and the centering of the front crossmember and the engine supports and reaction rod	Continue to Step 3	Engine supports faulty	Loosen the fixings: loosen the bolts, centre them in their housings and tighten them to the recommended torque (see Assembly 1008A)
			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)
			Engine support crossmember faulty	Bed in the fixings: loosen the bolts, centre them in their housings and tighten them to torque Op. 4410D13
3	CLUTCH PLATE CHECK	All OK	Problems met	Operation
	Verify: clutch disc wear or 'vitrification' that there is no damaged to the flywheel flexible coupling springs	Continue to Step 4	Clutch disc or pressure plate faulty	Replace the clutch disc or pressure plate Op. 1810A20
			Flywheel damaged	Also replace the gearbox input oil seal Op. 2110C22
			Flywheel damaged	Replace the flywheel Op. 1024B22
4	CHECK SPLINED HUB	All OK	Problems met	Operation
	Check for excess grease in the clutch disc hub bushes and the gearbox main shaft	Continue to Step 5	Gearbox main shaft hub faulty	Replace the gearbox main shaft (see OVERHAULING GEARBOXES Assembly 2110B)
		Continue to Step 5	Clutch disc hub bushes faulty	Restore the correct lubrication of the bushes If necessary, replace the clutch plate Op. 1810A20
5	FLYWHEEL CHECK	All OK	Problems met	Operation
	Check the condition of the flywheel (in particular, the condition of the surface and that there are no signs of overheating, uneven wear, incisions or material removed)	Continue to Step 6	Flywheel damaged	Replace the flywheel Op. 1024B22
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'