Yashica 635 repair

Hey gang, I recently acquired a pretty good yashica 635 tlr camera. The shutter won't fire the slower speeds (1 second, 1/2 second etc.), but seems to do alright in the higher speeds. Does anyone know what I need to do to get it working again? I'm not going to send it out to anybody because I've already got the camera taken apart on my desk. If anyone has any photos etc. I'd greatly appreciate it. Thanks!

You need to open up the front of the shutter and drip a small amount of naphtha/lighter fluid on the escapement. Do a search for Yahsica-mat and Copal MXV. The front lens group simply unscrews, counter-clockwise rotation to remove.

thanks dan!