Remove the oil pump drive gear (see Replacing the oil pump drive gear).
Remove the fuel pump with the heat-insulating gasket and pusher (see Replacing the fuel pump).
Remove the oil pump drive sprocket (see Replacing the camshaft drive chain).
Using a 10 mm spanner, unscrew the two bolts securing the thrust flange of the roller...
...and remove the flange.
We remove the drive shaft from the cylinder block.
We install the new roller in the reverse order.