{"product_id":"ath73639","title":"HO SD40 Locomotive C\u0026O #7451 (ATH73639)","description":"\u003cdiv class=\"product_description\"\u003e\n  \u003cp\u003eHO-scale Chesapeake and Ohio SD40 locomotive, road number 7451, is a highly detailed replica designed for HO model railroaders. It captures the EMD SD40 silhouette with an injection-molded body, see-through cab windows, LED lighting, photo-etched windshield wipers, and finely molded handrails, plus a detailed 4000-gallon fuel tank. Built for reliable, quiet operation, it rides on Flexicoil-C trucks with scale knuckle couplers and features all-wheel drive and precision gearing, while remaining DCC-ready with a Quick Plug 21-pin NEM connector for straightforward decoder installation.\u003c\/p\u003e\n  \u003cp\u003eSound-equipped variants include an onboard DCC decoder with SoundTraxx Econami and a dedicated speaker, delivering engine, horn, and bell sounds in DCC (and selectable functions in DC). The model also showcases curved radiator fan grab irons, rubber MU hoses, and other scale details that enhance realism on the layout. It supports NMRA-compliant CVs for tuning, uses RP25-contoured wheels for compatibility with various HO track brands, and is designed for HO layouts with a minimum radius of 18 inches (22 inches recommended) for smooth operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Athearn (ATH)","offers":[{"title":"Default Title","offer_id":47844018290740,"sku":"ATH73639","price":174.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/6653\/8292\/files\/ATH73639.jpg?v=1779964510","url":"https:\/\/nankinhobby.com\/products\/ath73639","provider":"Nankin Hobby","version":"1.0","type":"link"}