{"product_id":"800257-mv-3-dash-air-brake-control-valve-for-bendix-freightliner-peterbilt-keene","title":"800257 MV-3 Dash Air Brake Control Valve for Bendix Freightliner Peterbilt Keene","description":"\u003cstrong\u003eThis MV-3 Dash Air Brake Control Valve is a dash-mounted pneumatic push-pull valve compatible with Bendix systems on Freightliner, Peterbilt, and Keene trucks, and matches OEM Part# 800257.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003eThe MV-3 Dash Air Brake Control Valve controls parking brake and trailer air supply functions from a single compact module. Built to replace worn or sticky valves in heavy-duty air brake systems, the 800257 MV-3 valve restores dependable push‑pull actuation for safe vehicle operation. Fleet maintenance crews and owner‑operators rely on the MV-3 Dash Air Brake Control Valve for predictable performance in daily commercial service.\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSelf‑cleaning valve spool design resists sticking from moisture and debris\u003c\/li\u003e\n\u003cli\u003eZinc die‑cast body with corrosion‑resistant finish withstands road salt and chemicals\u003c\/li\u003e\n\u003cli\u003eErgonomic push‑pull knobs with clearly marked positions for intuitive control\u003c\/li\u003e\n\u003cli\u003eInternal check valves prevent unintended air bleed during parking brake apply\/release\u003c\/li\u003e\n\u003cli\u003ePre‑clocked mounting flange and matched port thread for straightforward dash panel retrofit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFreightliner trucks with Bendix air brake systems\u003c\/li\u003e\n\u003cli\u003ePeterbilt trucks with Bendix air brake systems\u003c\/li\u003e\n\u003cli\u003eKeene trucks with Bendix air brake systems\u003c\/li\u003e\n\u003cli\u003eAdditional commercial vehicles using Bendix MV‑3 dash valve assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacement of faded or leaking original MV‑3 valve on Class 7‑8 trucks\u003c\/li\u003e\n\u003cli\u003eDash‑panel rebuilds during full air system overhaul\u003c\/li\u003e\n\u003cli\u003eRestoring trailer air supply control for combination vehicle operation\u003c\/li\u003e\n\u003cli\u003ePreventive maintenance swaps on high‑mileage vocational trucks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 800257\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Type:\u003c\/strong\u003e MV‑3 Dash Air Brake Control Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Size:\u003c\/strong\u003e 1\/4″ NPT supply and delivery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnob Configuration:\u003c\/strong\u003e Yellow Park \/ Red Trailer Supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Pressure Range:\u003c\/strong\u003e 0‑150 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this valve include mounting hardware?\u003cstrong\u003e A:\u003c\/strong\u003e The unit ships with the standard mounting studs and gasket; reuse your original dash bezel and screws for a complete install.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I use this MV‑3 valve on a truck without an air dryer?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, the self‑cleaning spool is designed to operate in systems with or without air dryers, but routine reservoir draining is still recommended to prolong valve life.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53679690449169,"sku":"ZZ3A00650","price":87.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_6cf6f8b6-40ee-4cde-a630-8dab52e62604.jpg?v=1781653237","url":"https:\/\/www.duraforce.com\/products\/800257-mv-3-dash-air-brake-control-valve-for-bendix-freightliner-peterbilt-keene","provider":"DURAFORCE","version":"1.0","type":"link"}