Yep, like Dave says what wrong with it? when mine went south I though about just replacing it(15 years ago) but once I figured out what they were going for I changed my mind
and just put a new gland on the end of it
probably could have used a new rod also but... oh well maybe next time...
And getting them apart is no easy matter!!! when they been together for more than 1-20 years
so look up some of the threads on fixing cylinders that are here on HEF... plenty of tricks that will save you time and possibly destroying your can.