Place the shaft in a vice in such a way as to facilitate the disassembly operations.
Important
Take care not to invert the positions of the shims on reassembly: this would potentially lead to jamming when using the gear selector control, making it necessary to reopen the engine crankcase.
Disassembly of the gearbox secondary shaft
Remove the chain-side shim washer (26) and clutch-side shim washer (15) from the secondary shaft.

Withdraw the first speed driven gear (18) with the roller cage (17) and the shim (19).



Remove the fifth speed driven gear (20).

Use two flat blade screwdrivers to remove the circlip (7) taking care not to damage the shaft surface.
Remove the circlip (7) and the splined washer (6).


Withdraw the fourth speed driven gear (21) with the roller cage (4) and splined washer (12).
Remove the


Remove the third speed driven gear (22) with the roller cage (4) and the splined washer (6).


Remove the circlip (7) and remove the sixth speed driven gear (23).
Remove


Remove the circlip (7) and withdraw the splined washer (6) and the second speed driven gear (24).



Withdraw the roller cage (4) and the shim (3). All the components have thus been removed from gearbox secondary shaft (25).


Disassembly of the gearbox primary shaft
Remove the chain-side shim washer (11) and the clutch-side shim washer (1) from the primary shaft.

Remove the second speed driving gear (10). Use two screwdrivers to prise out the circlip (7) and the splined washer (6).
Important
Take care to avoid damaging the surface of the shaft while removing circlip (7).



Remove the sixth speed driving gear (9) with its roller cage (4). Remove the splined washer (6) and the circlip (7).



Withdraw the third and fourth speed driving gear (8).

Remove the circlip (7) and the splined washer (6).


Remove the fifth speed driving gear (5) with the roller cage (4).


Slide the shim (3) off the primary shaft (2).

Removal of the gearbox assembly
Overhaul of the gearboxGearchange mechanism
Return spring
Washer
Special screw
Gear pawl assembly
Interlock plunger holder
Sealing washer
Detent ball spring
Ball
Circlip
Selector claw return spring
Shim washer
Ring
Nut
Selector drum control fork
Gearchange lever pin
Shaft with gearchange lever arm
Gearch ...
Programming/reprogramming keys
The dds diagnosis instrument is required in order to programme/reprogramme
the keys. The key programming procedure
is launched from this instrument.
To start the key programming/reprogramming procedure it is necessary to have at
least one of the keys that start the
vehicle available (i.E. I ...
Overhaul of cylinder head components
Cylinder heads
Remove any carbon deposits from the combustion chamber and its ducts.
Remove any scale from the coolant ducts.
Check for cracking and inspect the sealing surfaces for scoring, ridges or other
damage.
Check that the cylinder barrel mating surfaces of the cylinder head are ...