Nikon VBA23001 Repair Manual page 84

Spring attaching position (Aperture lever)
#205
Spring attaching position (Preview latch lever)
Grease: LEN317A
Short
#205
#212
Grease:LEN317A
- A2 ･ D90 -
INC
VBA23001-R.3762.A
Long (thin)
#212
Long (thick)
#213
Grease:LEN317A
Dipping:
Grease: MZ-800SEL
Attach the spring by kind of
winding the end of the spring in
the protruding section of [#221].