Rosback 880 glue changeover

We have been running our 880 for about a year and were hoping to do some maintenance/glue changeover. Altho we dont have the manual it might help, we would buy a hard copy if anyone has one.

looks like the glue pot is removable. I read that wax is best to clean it out, and a hot air gun helps. Im used to slautterbacks etc. so I have worked with molten product before, but only in production//we had a maintenance person rebuild the gluers.

Our shop is in Chicago