I bought a WD18500 shop vac last summer, light duty, little use. While vacuuming sawdust, just quit. 90 day warranty at Home Depot, can't find receipt. Fix it myself rather than shipping back to St.Louis. Switch good, continuity to motor, ohmed windings, 1 side good, 1 side (w/ capacitor) not so good (resistance). Can't read printing on capacitor, white on one end. Looking for cap rating, where to find one.