Sony tc-wr565 problems?

I have a Sony tc-wr565 and the belts were gone on it so I changed them.Now the tape deck pinch roller mechanisem seems to go up and down erradicly but cant seem to reset it self properly.I think it is because of the fr motor gears that are out of position because this seems to control most of the deck functions.In the service manual there is no clarification on this and if they are out of wack what is the right position.If somebody has encountered this problem before and knows what it is and how to solve it please write me because this tape deck has got pist off.....