E03 CLUTCH VIBRATING OR JERKING - Alfa - 156 - eLearn

3233029 - 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	Bed in 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
1.6 TS 1.8 TS [d] 1.9 JTD 8v	Check: clutch disc wear or "vitrification" that there is no damage to the pressure plate diaphragm spring that there is no damage to the flexible coupling springs	Continue to Step 4	Clutch plate or pressure plate faulty	Replace the clutch plate Op. 1810A20
1.6 TS 1.8 TS [d] 1.9 JTD 8v		Continue to Step 4	Presence of oil or grease	Also replace the gearbox input oil seal Op. 2110C22
2.5 V6 2.4 JTD 10v	Check: clutch disc wear or "vitrification" that there is no damaged to the flywheel flexible coupling springs	Continue to Step 4	Clutch plate or pressure plate faulty	Replace the clutch plate Op. 1810A20
			Presence of oil or grease	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 on the clutch plate 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 plate hub bushes faulty	Restore the correct lubrication for 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, irregular wear, incisions or the removal of material)	Continue to Step 6	Flywheel damaged	Replace the flywheel Op. 1024B22
6	CHECK 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'