[RodB]

Hi Steve and welcome to the Phorum. I have taken a filter block apart and I was lucky. Mine had six caps packed in wax. Typically they are packed in the black tar and there are a couple ways to replace the caps. Take pictures and draw a diagram of the connections and mark the terminal numbers. Probably the most used removal is to heat the can and slide the old ones out after carefully opening the bottom where the terminals are. You will probably be able to mount the new caps right on the terminals. You can buy poly film caps, electrolytic caps are not recommended. I get mine from Mouser. There is a step by step to follow and it may be here on the Phorum.

I don't see a parts list but part 13 is typically 0.1 mfd and 21 is typically 0.01 mfd. All caps can be 630 volts.