Excessive brake pedal free play
- Make
- Alfa Romeo
- Model
- 147 Factory Service Manual
- Year
- 2000–2004
- Section
- Braking system › Excessive brake pedal free play
Fault diagnosisExcessive brake pedal free play
EXCESSIVE BRAKE PEDAL FREE PLAY
When the brake pedal is depressed, its travel is longer than the normal operating travel.
| Results of the tests | ||||
| 1 | CHECKING BRAKE PEDAL SOFTNESS | All OK | Problems met | Operation |
|---|---|---|---|---|
Check that the brake pedal is not soft Check brake fluid level Check that there are no fluid leaks from: connectors, pipes, hoses, brake adjuster, reservoir, wheel cylinders, master cylinder Check that the flexible couplings expand under the braking action Check that the hole in the brake fluid reservoir is not blocked | Continue to Step 2 | Pedal soft | Bleed the air Op. 3330A14 | |
| Fluid missing from reservoir because of leak | Tighten the connectors or replace the part generating the leak, then top up to the medium level Op. 3330A10 | |||
| Fluid missing, but leak not visible | Move on to Step 2 | |||
| Front hoses dilate | Replace hoses | |||
| Hole blocked | Clean hole | |||
| 2 | CHECK BRAKE PEDAL | All OK | Problems met | Operation |
| Check that the brake pedal does not have two pressure stages and that it returns promptly | Continue to Step 3 | The pedal jumps: one chamber is not holding pressure | Replace the brake servo/pump assembly Op. 3330D02 | |
| The pedal returns after a delay: master cylinder fault. | Replace pump/ servo brake assembly Op. 3330D02 | |||
| The pedal returns after a delay: front caliper fault. | Replace calipers Op. 3310A30 | |||
| The pedal returns after a delay: rear caliper fault. | Replace calipers Op. 3310B36 | |||
| 3 | CHECKING EFFICIENCY OF HANDBRAKE SELF-ADJUSTER | All OK | Problems met | Operation |
| Check the efficiency of the handbrake self-adjuster, by pulling the handbrake | Continue to Step 4 | Device faulty | Change the device | |
| 4 | CHECKING BRAKE PEDAL SOFTNESS | All OK | Problems met | Operation |
| Check whether the pedal becomes too soft after several braking actions (Vapour loop) | Continue to Step 5 | The pedal becomes soft | Replace brake-clutch fluid Op. 0010T62 | |
| The pedal becomes soft | Change the brake fluid Op. 0010T60 | |||
| 5 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
Test the vehicle before delivery to the customer, to check that the fault is no longer present. The test is essential, as the braking system involves a safety feature of the car | Fault persists | Search for the fault starting from another symptom' | ||
Parts & tools for this job For 2000 Alfa Romeo 147
- PARTBrake padsSearch: Alfa Romeo 147 2000 brake pads
- TOOLBrake bleeder kitSearch: one man brake bleeder kit
- FLUIDBrake fluidSearch: brake fluid
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