Click on the link and print yourself a copy of the original owners manual:
http://gunmanuals.net/Manuals/jchiggins_25.pdf
Takedown is very easy, can be done with just a coin. I pulled mine apart shortly after buying it, gave it a cleaning for what was probably the first time in it's life.
I've probably put 500 rounds through mine in the last two months, I am really liking it. Very reliable and accurate, I'd buy another if I could find one....