184000425 - E02 CLUTCH SLIPPING

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Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Set off from a standstill in 4th gear, gradually releasing the clutch pedal and check the fault: the car does not move and the engine does not stallContinue to Step 1The engine cuts out: the clutch does not slip
1CHECK ON CLUTCH LEVER TRAVELAll OKProblems metOperation
Check, inside the engine compartment, that when the clutch pedal is pressed, the clutch control lever on the gearbox performs the correct travelContinue to Step 8Incomplete travel of clutch lever on gearboxContinue to Step 2
2CHECK ON CLUTCH PEDALAll OKProblems metOperation
After disconnecting the clutch pedal from the transmission , check that it travels freely without tight spots or stiffnessContinue to Step 3Play or stiffness on clutch pedalReplace the pedal Op. 3330B26
3CHECK SLIDING OF OPERATING CYLINDER PUSHRODAll OKProblems metOperation
Check the travel and return to rest position of the clutch operating cylinder pushrodContinue to Step 8Incomplete travel of clutch control cylinder pushrodContinue to Step 4
4CLUTCH CONTROL LEVER CHECKAll OKProblems metOperation
Release the clutch operating cylinder from the lever and check that it is freeContinue to Step 5The lever is not freeContinue to Step 8
5CHECK ON CLUTCH CONTROL SYSTEM (ON CAR)All OKProblems metOperation
Release the cylinder from the clutch control lever, keeping it connected to the hydraulic system.Press the pedal to induce the thrust pressure and check the pushrod travelPush the pushrod back in using a punch, checking that it travels freelyContinue to Step 8Malfunction of clutch control cylinderRemove the clutch operating cylinder Op. 1820B30 Continue to Step 6
6CHECK ON CLUTCH CONTROL CYLINDER (WITH GEARBOX REMOVED)All OKProblems metOperation
With the part at the bench, apply pressure (with compressed air) and check the pushrod travel (The test mirrors what was done on the car)
The purpose of this test is to make sure that the fault is in the cylinder and not the pipes or pump
Continue to Step 7Malfunction of clutch control cylinderReplace the clutch operating cylinder Op. 1820B30
7CHECK ON CLUTCH PEDAL TRAVELAll OKProblems metOperation
With the system disconnected, check that the travel is correct when the pedal is pressed and releasedContinue to Step 8Malfunction of hydraulic pumpReplace the pump Op. 1820B20
Hose from clutch reservoir to pump worn or deformedReplace the pipe Op. 1820B40
Supply hose to clutch operating cylinder worn or deformedReplace the pipe Op. 1820B48
8CHECK ON CLUTCH RELEASE LEVER AND BEARING (WITH GEARBOX REMOVED)All OKProblems metOperation
After removing the gearbox, check that the lever is not stiff (because of dirty or insufficient lubrication) and that the clutch release bearing runs freely in its seating and shows no signs of damageContinue to Step 9The presence of dirt or wear caused by insufficient lubrication does not allow the clutch release bearing to slide correctlyReplace the faulty or damaged parts
9CHECK ON CLUTCH ASSEMBLYAll OKProblems metOperation
Visual check on the condition of the clutch assembly, on which there should be no breaks (pressure plate) and/or obvious damage (driven plate) Measurements with gauge as per manualContinue to Step 10Obvious damage of clutch disc and/or breakage of pressure plateReplace the assembly Op. 1810A24
10CHECK ON SPLINED CLUTCH HUBAll OKProblems metOperation

Check, in order:

  • that there is no excess grease on the clutch plate hub bushes and the gearbox main shaft;
  • condition of hub and main shaft
Continue to Step 11Main shaft damaged, hub worn, excessive grease on bushesReplace hub and/or main shaft
11CHECK ON FLYWHEEL CONDITIONAll OKProblems metOperation
Check the condition of the flywheel

In particular, check:

  • condition of surface
  • wear
  • chips
  • signs of overheating;
Continue to Step 12Flywheel damagedReplace the flywheel Op. 1024B10
12CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.