2888453 - S23 NOISE' GEARBOX / IN A SPECIFIC GEAR
With the engine running, a noise is heard (whilsting inside the gearbox) when a specific gear is engagedThis noise decreases or disappears on changing gear.| Results of the tests | ||||
| 1 | CHECK SYNCHRONIZER RINGS | All OK | Problems met | Operation |
|---|---|---|---|---|
| Service the gearbox ( Op. 2110B20 ) In particular, check the synchronizer rings for the gear involved: they should not show signs of wear on the inner surfaces | Continue to Step 2 | Seals worn | Replace the synchronizers | |
| 2 | CHECK GEARS | All OK | Problems met | Operation |
| Service the gearbox ( Op. 2110B20 ) In particular, check the teeth of the gear concerned: they should not be worn or show signs of seizing | Continue to Step 3 | Gears worn | Replace the gears involved | |
| 3 | CHECK THE FORKS | All OK | Problems met | Operation |
| Service the gearbox ( Op. 2110B20 ) In particular, check the condition of the fork and the relevant gear sleeve | Continue to Step 4 | Fork worn | Change the fork and the relevant sleeve | |
| 4 | CHECKING THE GEAR SET | All OK | Problems met | Operation |
| Check
the crown wheel and pinion reduction gear ( Op. 2110D20 ) In particular
| Continue to Step 5 | Reduction gear damaged | Restore the clearance or, if necessary, replace the reduction gear | |
| 5 | CHECKING 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' | |