Does yours look like the one in the picture? The one in the picture is not held in with a bolt but by a roll pin that needs drifting out, this type has a ‘ sprung clip that passes through the roll pin. This type do ‘freeze’ into bell housing and can be very difficult to remove. I’m assuming as you said you removed a bolt that yours is a later type? If so it should not stick because it does not sleeve into the bell housing, it may be necessary to first push or lever the cylinder forward against the hydraulic pressure then sideways and out.
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