We have a 1985 PC 120 with 6200 hrs. Pump seems to be slowing down is there any way to get a little more power out of the pump by "turning it up"? I've heard it being done just don't know how it's done.
You need to tell us the Dash number. This could be a Dash 1 or Dash 2. I don't think it could be a Dash 3. A picture of the machine would give us a clue.