Indesit IS70C Drum problem?

I have an Indesit IS70C tumble dryer the drum wasnt working and after investigating I found that the Jockey wheel was broken. I have replaced this however the drum still does not go round? I cant find any diagrams to show me how the parts are attached, just incase I have not fitted them properly. The drum does move when I turn it and the motor also works but the belt hardly moves? Does anyone know where I can find a parts diagram or have any suggestions?
Here's Hoping