Yamaha SIGMA-G5SII Service Information page 159

(5) Remove the nozzle shaft assembly.
Remove the following three lower rotor set bolts (M1. 6L4) as shown in the
following figure and remove the nozzle shaft assembly (lower rotor) from the DD
motor.
When it is removed, pull it down vertically.
Condition where the Nozzle Shaft Assembly has been removed
Service Information
Fig.D71
Fig.D72
SI1705004E-00=SIGMA-G5SII Service Manual
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For Service Engineer
Remove the three set
screws as shown
with the " " mark.