Look here for manual and parts:http://www.bostitch.com/default.asp?TYPE=STATICLEFT&PAGE=tooldoc_results.htm&Left=left_tooldoc_results.htm&partNum=WM45B&serialNum=
The two lines of address above should be all one line in the address bar. If it does not work, go to
www.bostitch.com , service parts and find wm45b. Good luck