| | Results of the tests |
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|
| Disconnect
the services belt and check whether the noise disappears. | Do not let the engine run for long with the belt disconnected |
Check whether the noise only occurs with the engine switched
off | Continue to Step 2 | The noise disappears when
the services belt is disconnected | See table S10 ENGINE WHILSTLING / SERVICES BELT NOISY' |
| The noise only occurs with the engine switched off | Check that it is not coming from the electric fan |
| The noise does not disappear | Continue to Step 1 |
| 1 | CHECKING PIPE AND COMPONENT FASTENINGS | All OK | Problems met | Operation |
|---|
| Check
that the compressor and the system pipes and components are correctly
fixed. In the following order: - drier filter fixing
- pipes fixing (with bands and spacers)
- no interference between the pipes and other components
in the engine compartment
- Compressor fixing to the engine
| Continue to Step 2 | Components fixing not
correct | Restore
the correct tightening. If necessary, replace the bands or spacers Op. 5040A14 |
| Interference in the engine compartment | Restore the correct pipe layout |
| 2 | 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' |