NSS 23-9-557-1 24V Vacuum Motor for NSS with Side Discharge Tube for NSS Floor Scrubbers. Powerful 24V DC, 3-Stage, dual ball bearing Ametek vacuum fan motor. 5.7" diameter, by-pass design with a side discharge tube. 26 Amps. Fits many National Super Service 24V models including Wrangler 20B (will not fit 20E), Wrangler 20WD, Wrangler 24, Wrangler 26VS, Wrangler 2625, Wrangler 27VS, Wrangler 33VS, Wrangler 2016AB, 2016DB walk behind autoscrubbers. One vacuum motor required in most models. Dealer List Price is $332.35!! Save more than $144.00. Priced Each. Replaces NSS 23-9-557-1. Our Part Number NSS 2395571, NSS 23-9-557-1.