I have a NAPA impact wrench I’ve been using for 30+ years that suddenly stopped working. It sounds like it is running on low air pressure, it turns slowly and does not energize the hammers. The manual mentions a filter/screen under the air connection but the fitting seems to be frozen/seized in the handle and I can’t get it to turn. The manual also gives a part number for a repair kit but the local NAPA store hasn’t responded to my request. I’d hate to toss it for some minor repairable problem.