{"product_id":"5000335-genuine-bendix®-atr-1-traction-relay-valve","title":"5000335 | Genuine Bendix® RV-1 Pressure Reducing Valve","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: RV-1 Pressure Reducing Valve\u003cbr\u003e\u003cstrong\u003eCondition: \u003c\/strong\u003eNew \u003cbr\u003e\u003cstrong\u003eBrand: \u003c\/strong\u003eBendix\u003cstrong\u003e®\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003ePart Number: \u003c\/strong\u003e50000335\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"3\"\u003e1. Compatible System Applications\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eThe Bendix® ATR-1 (Antilock Traction Relay) valve is an essential component of a heavy-duty commercial vehicle's air brake safety system. It combines a standard air brake relay valve with a traction control solenoid. It integrates directly into:\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"5,0,0\"\u003eABS \/ ATC Systems:\u003c\/b\u003e Works alongside the Electronic Control Unit (ECU) to manage Automatic Traction Control (ATC). When the system detects drive-wheel spin on slippery surfaces (like ice or mud), this valve automatically applies a controlled amount of brake pressure to the spinning wheel to transfer torque to the wheel with traction.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"6\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"6\"\u003e2. Common Vehicle Types\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003eThis is a universal Class 8 commercial vehicle component rather than a single-model part. It is widely found on:\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,0,0\"\u003eSemi-Trucks \/ Tractors:\u003c\/b\u003e Freightliner, Kenworth, Peterbilt, International, Mack, and Volvo trucks equipped with active traction control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"8,1,0\"\u003eCommercial Transit Buses:\u003c\/b\u003e Heavy-duty transit buses and motor coaches operating in regions prone to inclement weather.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-444\"\u003eThe ATR-1 (Antilock Traction Relay) is essentially \u003c\/span\u003e\u003cspan class=\"citation-444 citation-end-444\"\u003ethree separate valves housed inside a single heavy-duty aluminum casing\u003c\/span\u003e. \u003cspan class=\"citation-443 citation-end-443\"\u003eIts foundation is a standard R-14® style service relay valve, but it is equipped with a modified top cover containing a double check valve and an integrated electronic traction control solenoid.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp id=\"p-rc_922bbdd61e36374a-40\" data-path-to-node=\"5\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"5\"\u003e\u003cspan class=\"citation-442\"\u003eCore Functions\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-442 citation-end-442\"\u003e\u003csup data-turn-source-index=\"4\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_922bbdd61e36374a-41\" data-path-to-node=\"6,0,0\"\u003e\u003cspan class=\"citation-441\"\u003e\u003c\/span\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"6,0,0\"\u003e\u003cspan class=\"citation-441\"\u003eNormal Relay Function:\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-441 citation-end-441\"\u003e During standard driving, it functions exactly like a regular rear-axle relay valve.\u003csup data-turn-source-index=\"5\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-440 citation-end-440\"\u003eWhen you press the brake pedal, it instantly routes high-pressure air from the primary reservoirs directly to the rear brake chambers to stop the truck.\u003csup data-turn-source-index=\"6\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_922bbdd61e36374a-42\" data-path-to-node=\"6,1,0\"\u003e\u003cspan class=\"citation-439\"\u003e\u003c\/span\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"6,1,0\"\u003e\u003cspan class=\"citation-439\"\u003eAutomatic Traction Control (ATC):\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-439 citation-end-439\"\u003e If the vehicle’s ABS computer senses that one of the rear drive wheels is slipping on ice, snow, or mud at speeds under 25 mph, it sends an electrical signal to this valve’s 2-pin solenoid.\u003csup data-turn-source-index=\"7\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-438 citation-end-438\"\u003eThe valve then automatically applies precise air pressure only to the spinning wheel.\u003csup data-turn-source-index=\"8\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-437 citation-end-437\"\u003eThis forces the vehicle's differential to transfer mechanical torque over to the stationary wheel that actually has grip, helping the truck pull away safely.\u003csup data-turn-source-index=\"9\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_922bbdd61e36374a-43\" data-path-to-node=\"6,2,0\"\u003e\u003cspan class=\"citation-436\"\u003e\u003c\/span\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"6,2,0\"\u003e\u003cspan class=\"citation-436\"\u003e\"4 PSI DIFF\" (Crack Pressure):\u003c\/span\u003e\u003c\/b\u003e\u003cspan class=\"citation-436 citation-end-436\"\u003e The label dictates a 4 PSI crack differential.\u003csup data-turn-source-index=\"10\" class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-435 citation-end-435\"\u003eThis means it takes exactly 4 PSI of air pressure to overcome internal mechanical resistance, open the inlet valve, and begin delivering air to the brakes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of Faulty\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"3\"\u003e1. Constant Air Exhaust Leakage (Audible Hissing)\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"4\"\u003eIf you hear a steady stream of air escaping from the exhaust port at the bottom of the valve when the brakes are \u003ci data-index-in-node=\"113\" data-path-to-node=\"4\"\u003ereleased\u003c\/i\u003e, the internal rubber seals or inlet\/exhaust seat have deteriorated. A leak while the brakes are \u003ci data-index-in-node=\"218\" data-path-to-node=\"4\"\u003eapplied\u003c\/i\u003e indicates a ruptured internal diaphragm.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"5\"\u003e2. ATC \/ ABS Dash Warning Lights Illuminated\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThe ATR-1 features an integrated electronic solenoid. If the internal coil shorts out, develops high resistance, or the electrical pins corrode, the ABS Electronic Control Unit (ECU) will immediately detect the circuit fault and illuminate the \u003cb data-index-in-node=\"244\" data-path-to-node=\"6\"\u003eATC (Automatic Traction Control)\u003c\/b\u003e or \u003cb data-index-in-node=\"280\" data-path-to-node=\"6\"\u003eABS\u003c\/b\u003e light on the dashboard.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"7\"\u003e3. Sluggish Brake Application or Slow Release\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eA failing relay valve may fail to rapidly route air to the chambers or refuse to exhaust it quickly when you lift off the pedal. If you notice a distinct delay between pressing the pedal and feeling the brakes engage (or if the rear brakes seem to drag and release slowly), the internal piston or spool is sticking.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"9\"\u003e4. Loss of Traction Control on Slippery Surfaces\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003eIf the mechanical double check valve or the electronic solenoid inside the top cover jams, the ATC system will fail to function. When pulling away on ice or mud, the truck will simply spin one wheel freely without the valve pulsing air to grab the spinning side and transfer torque.\u003c\/p\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"11\"\u003e5. Wheel Lockup or Uneven Rear Braking\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eIf the valve's internal mechanism sticks or fails to balance air pressure properly, it can cause the rear brakes on that axle to lock up prematurely or apply unevenly compared to the rest of the truck, leading to dangerous skidding.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003eA part of the Knorr-Bremse Group, \u003cstrong\u003eBendix®\u003c\/strong\u003e provides the automotive and truck parts industry with cutting-edge energy management solutions, active safety technologies, and air brake charging for tractors, buses, commercial vehicles, trailers, as well as medium- and heavy-duty trucks throughout North America. Headquartered in Elyria, Ohio, Bendix Commercial Vehicle Systems employs over 3,200 people who work hand in hand for the accomplishment of the brand's vision: \"to become the leading worldwide supplier of active vehicle safety systems within the commercial vehicle industry.\" This brand takes pride in being the first to introduce many notable parts and technologies to the North American commercial vehicle market. Among these many firsts are the groundbreaking air brake system technologies such as air dryers, air compressors, and ABS. At Bendix, exceeding industry standards is a strict requirement. \u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003cbr\u003eFirst Truck Parts offers a \u003cstrong\u003e365-days\u003c\/strong\u003e \u003cstrong\u003ewarranty\u003c\/strong\u003e for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.\u003c\/p\u003e","brand":"Bendix®","offers":[{"title":"Default Title","offer_id":48805342118132,"sku":"5000335","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/images_8b726758-842f-4617-9cc4-39004f453713.jpg?v=1783108994","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/5000335-genuine-bendix%c2%ae-atr-1-traction-relay-valve","provider":"First Truck Parts","version":"1.0","type":"link"}