The friend of a friend who was going to sort it out has told me that it isn't worthwhile putting replacement R12 into the compressor because it will burn it out. He can't put R12 into it becasue its illegal.
Time for a second opinion Dave. There are good replacementgasses for old R12 systems or
who would be arresting you for using a 12 oz can of real R12?
And finally.....how often would you be running the Jacobs? You certainly have enough other machines