unscrew the collar? that black metal trim ring with a couple notches in it? Mine moves about 1/8 turn either way but that's it.

From looking at other posts & pics, I thought that collar comes out with the tumbler and then seperates.

If the collar has to unscrew "before" pulling the tumbler, do the pins have to be inserted "before" you can unscrew it or does it matter? What do you grab the collar with? Large pliers or should it unscrew easily by hand?

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5