Clutch vibrating or jerking
- Make
- Fiat
- Model
- Doblò Factory Service Manual
- Year
- 2000–2010
- Section
- Clutch › Clutch vibrating or jerking
Fault diagnosisClutch vibrating or jerking
CLUTCH VIBRATING OR JERKING
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Set off from a standstill releasing the clutch gradually, and check whether acceleration is jerky (discontinuous advancement). Drive the car at constant speed (equal to about 1000 rpm in 4th gear) and, with the clutch pedal release, accelerate rapidly, pressing the accelerator to the floor instantly. Check whether advancement is discontinuous (jerky). | Continue to Step 1 | Advancement is discontinuous (jerky) | Check the engine and/or fuel injection mountings | |
| 1 | CLUTCH PEDAL POSITION CHECK | All OK | Problems met | Operation |
| Visually check the alignment of the clutch pedal in relation to the brake pedal | Continue to Step 2 | Alignment not correct | Adjust the clutch cable linkage Op. 1820A14 | |
| 2 | CHECK CLUTCH LEVER TRAVEL | All OK | Problems met | Operation |
| Check, inside the engine compartment, that when the clutch pedal is pressed, the clutch control lever on the gearbox performs the correct travel | Continue to Step 5 | Incomplete clutch lever travel on gearbox | Continue to Step 3 | |
| 3 | CLUTCH PEDAL CHECK | All OK | Problems met | Operation |
| After disconnectign the clutch pedal from the transmission (see Assembly 1820), check that it travels freely without tight spots or stiffness | Continue to Step 4 | Play or stiffness of clutch pedal | Replace the pedal Op. 3330B26 | |
| 4 | MECHANICAL CONTROL CHECK | All OK | Problems met | Operation |
| With the linkage disconnected from the pedal, check that there is no hardening or sticking and that the cable is free and intact by sliding it | Continue to Step 5 | Linkage damaged | Replace the linkage Op. 1810A20 | |
| 5 | CHECK ON PRESSURE PLATE AND BEARING (WITH GEARBOX REMOVED) | All OK | Problems met | Operation |
| After removing the gearbox, check that the lever is not stiff (because of dirt or insufficient lubrication) and that the clutch release bearing runs freely in its seating and shows no signs of damage | Continue to Step 6 | The presence of dirt or wear caused by insufficient lubrication does not allow the clutch release bearing to slide correctly | Replace faulty or damaged components Op. 1020A24 | |
| 6 | CHECK ON CLUTCH ASSEMBLY | All OK | Problems met | Operation |
| Visual check on the condition of the clutch assembly, which should not show breaks (pressure plate) and/or obvious damage (disc). Measurements using the gauge as per manual Op. 1820A20 | Continue to Step 7 | Obvious damage of clutch disc and/or breakage of pressure plate | Replace the assembly Op. 1820A20 | |
| 7 | CHECK ON CLUTCH SPLINED HUB | All OK | Problems met | Operation |
Check, in order:
| Continue to Step 8 | Main shaft damage, hub worn, excessive grease on bushes | Replace the hub and/or main shaft Op. 1810A20or OVERHAULING GEARBOXES Assembly 2110B | |
| 8 | FLYWHEEL CONDITION CHECK | All OK | Problems met | Operation |
Check the condition of the flywheel. In particular, check:
| Continue to Step 9 | Flywheel damaged | Replace the flywheel Op. 1024B22 | |
| 9 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | Fault persists | Search for the fault starting from another symptom' | ||
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Set off from a standstill releasing the clutch gradually, and check whether acceleration is jerky (discontinuous advancement). Drive the car at constant speed (equal to about 1000 rpm in 4th gear) and, with the clutch pedal release, accelerate rapidly, pressing the accelerator to the floor instantly. Check whether advancement is discontinuous (jerky). | Continue to Step 1 | Advancement is discontinuous (jerky) | Check the engine and/or fuel injection mountings | |
| 1 | CHECK CLUTCH LEVER TRAVEL | All OK | Problems met | Operation |
| Check, inside the engine compartment, that when the clutch pedal is pressed, the clutch control lever on the gearbox performs the correct travel | Continue to Step 3 | Incomplete clutch lever travel on gearbox | Continue to Step 2 | |
| 2 | CLUTCH PEDAL CHECK | All OK | Problems met | Operation |
| After disconnecting the clutch pedal from the transmission Op. 1020B20, check that it travels freely without tight spots or stiffness | Continue to Step 3 | Play or stiffness of clutch pedal | Replace the pedal Op. 3330B26 | |
| 3 | CHECK ON PRESSURE PLATE AND BEARING (WITH GEARBOX REMOVED) | All OK | Problems met | Operation |
| After removing the gearbox, check that the lever is not stiff (because of dirt or insufficient lubrication) and that the clutch release bearing runs freely in its seating and shows no signs of damage | Continue to Step 4 | The presence of dirt or wear caused by insufficient lubrication does not allow the clutch release bearing to slide correctly | Replace faulty or damaged components | |
| 4 | CHECK ON CLUTCH ASSEMBLY | All OK | Problems met | Operation |
| Visual check on the condition of the clutch assembly, which should not show breaks (pressure plate) and/or obvious damage (disc). Measurements using the gauge as per manual | Continue to Step 5 | Obvious damage of clutch disc and/or breakage of pressure plate | Replace the assembly Op. 1810A24 | |
| 5 | CHECK ON CLUTCH SPLINED HUB | All OK | Problems met | Operation |
Check, in order:
| Continue to Step 6 | Main shaft damage, hub worn, excessive grease on bushes | Replace the hub and/or main shaft | |
| 6 | FLYWHEEL CONDITION CHECK | All OK | Problems met | Operation |
Check the condition of the flywheel. In particular, check:
| Continue to Step 7 | Flywheel damaged | Replace the flywheel Op. 1820B10 | |
| 7 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | Fault persists | Search for the fault starting from another symptom' | ||
Parts & tools for this job Staging For 2000 Fiat Doblò
- PARTClutch kitSearch: Fiat Doblò 2000 clutch kit
- TOOLClutch alignment toolSearch: clutch alignment tool
- FLUIDGear oilSearch: Fiat Doblò manual gearbox oil
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