Some info here, but you need a manual...
I did this a few years ago. It's really not too difficult, once you get the valve body split and track down where all the balls go. Be sure to RTFM and turn the
VB over before you split it (don't ask).
There is an amazing amount of crud in there, and I don't care what anybody says, there is no additive made that is going to get in all the nooks and crannies and clean all that silt out.
Rick