Go to www.thetfor-europe.com
follow these instruction for downloads of free pdf's
UK & EUROPE	www.thetford-europe.com	
Australia	www.thetford.com.au          (Even get request from Australian campers)	
	Australia site has stockist list.	
HOME PAGE 	SELECT 	ENGLISH {if in Australia forget this selection)
NEXT PAGE	SELECT 	CUSTOMER SERVICE (top line) 
NEXT PAGE	SELECT 	USER INFORMATION  (left of pic) also 'Ask thetford' is on this page.
NEXT PAGE	SELECT 	REPAIR INSTRUCTIONS   (left of pic)
NEXT PAGE	SELECT 	BUILT IN TOILETS  [top right of pic] 
NEXT PAGE	SELECT 	This is where you select your toilet range. Search alll if unsure of type/range
NEXT PAGE	PDF Files	You should be in the pdf folder list on your Thetford toilet. Start downloading.
Remove the cassette it's in the housing up left I think never had to access mine yet. So post in reply if you find it.
                
 Bob
                
 May 2010