If memory serves, you have to drill out the
rivet holding the fiber 1" circles to the
shutter handles, then pull from the inside. Now install the new one (or the used one in better shape, and re-rivet, or use little bolts and nuts and
LocTite to hold the heat-resistant "handles" on. Keep another
unit open so you get the shutters back in the same "plane" from whence they came.
I don't recall any mfg. making "replaceable shutters back then. What kind of new-fangled concept is that? Diecast Century Lekolights used thin stainless shutters that would cut your
hand, would you prefer that?
Or the
Strand Lekolight just before the SL series had shutters that were too easily removed--look at them funny and they'd fall out. In 2000, I was focusing the
FOH catwalk for a friend and he asked for a cut off the SL
proscenium. It was my first time using these lights and boy was I surprised when I reached on my left side of the
fixture only to find no
shutter there! Then I realized that that particular light I was on had no shutters whatsoever. I yelled, "Hang on, I have to go find a
shutter." Having never worked with these lights either, he gave me the most puzzled look, while I pulled a
shutter out of an adjacent light and shoved it in the light that was lit. We finished the focus and when I got down to his
level I explained to him. This was a state-of-the-art light in 1991.
I didn't mind them other than that, but no one else would use them because they weren't SourceFours, so they became landfill, even the 6 15° units that I loved as specials. By the way, there was very little
intensity difference between a 19° S4 575 and a 20°
Strand Leko with an FEL (sorry ship, I didn't know any better.) We had more than enough dimmers and the hotel paid for the
power.