Mamiya 645 PRO TL - Manual (Page 14)

Removing and Attaching the Film Advance Crank
Removing the Crank Attaching the Crank
Push the lock Lever on its bottom
in a forward direction as far as it will
With the flat part, having a White
go (see illustration).
Index Line, on top, line the Crank up
against its mounting plate on the side
of the body and push Film Advance
Crank Lock Lever backward.
You may choose six different crank
starting positions to suit your prefer-
ence. The orientation of the crank
proper against its base, before it is
attached to the camera, will be main-
tained when the entire assembly is
locked into place.