Need help with HWH slideout problem on a 2002 Suncruiser

I had my first problem with the HWH hydraulic slideout on the bedroom/wardrobe slideout on my 2002 Itasca Suncruiser 35U. This is the twin of the Winnebago Adventurer 35U. The slide is going in and out but I heard a cracking sound and there is a piece of black plastic hanging down. I'll try to post a few pics. The rest of the black plastic has foam on it and it has a center hole in it that slides along the cylinder. A big metal screw-like piece came off too. It looks like something broke off the end of the metal screw-like piece. See pics. Now the slideout will go in most of the way but sticks out about 2". When you extend it out, it makes a big thunk sound like it's stopping abruptly when it's all the way out. I found the HWH slideout full assembly part numbers on the PDF file at winnebagoind.com I called Winnebago and they said those part numbers are for full assembly parts and told me to call HWH to try to obtain the individual parts. I called HWH and they said to send pictures. I had Alpin Haus in Port Jervis, NY take a look at it but those guys are mostly familiar with trailers and 5th wheels. Does anyone have any experience with this? I'd greatly appreciate any input.
I posted four pictures here http://www.pbase.com/roberta/2002_itasca_suncruiser_35u