Specifications

Mark the timing chains so as not to in-
vert the direction of rotation upon fit-
ting.
Slide off the service shaft from the
chains.
Remove both chains.
See also
Removing the phonic wheel
Installing the service shaft
Place the service shaft bearing (if pre-
viously removed) on the crankcase.
Fix it to the seat with the lock washer
and screw.
Fit the timing chains according to the
references marked at the removal
phase.
Lubricate the service shaft.
Insert the service shaft in its crankcase
seat by sliding it through the two
chains.
Fit each chain to the corresponding
service shaft gear.
Fit the roller cage and a new O-ring on
the service shaft closing cap.
GRISO 8V - 1200 Engine
ENG - 139
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