{"product_id":"3408705-genuine-cummins®-pressure-switch-for-isb-qsb-engines","title":"3408705 | Genuine Cummins® Pressure Switch for ISB\/QSB engines","description":"\u003cp\u003e\u003cstrong\u003eDescription:\u003c\/strong\u003e Pressure Switch for ISB\/QSB engines\u003cbr\u003e\u003cstrong\u003eCondition: \u003c\/strong\u003eNew\u003cbr\u003e\u003cstrong\u003eBrand: \u003c\/strong\u003eCummins®\u003cbr\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 3408705\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\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCummins® ISB \/ QSB Series:\u003c\/b\u003e 5.9L and 6.7L mid-range diesel engines (used in commercial trucks, buses, and industrial machinery).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCummins® ISC \/ QSC Series:\u003c\/b\u003e 8.3L diesel engine platforms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCommercial Truck Applications:\u003c\/b\u003e Freightliner® (M2 106, FC70), International® \/ Navistar® (DuraStar \/ 4000 Series), Kenworth®, and Peterbilt® medium-duty trucks powered by ISB or ISC engines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBus Chassis Fitment:\u003c\/b\u003e Blue Bird® and Thomas Built Buses® equipped with ISB 5.9L \/ 6.7L engines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOff-Highway \u0026amp; Industrial Equipment:\u003c\/b\u003e Construction, agricultural, and power generation units (G-Drive \/ Gensets) powered by QSB \/ QSC engines.\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\u003eThe Pressure Switch\u003cb\u003e \u003c\/b\u003eis an OEM electromechanical safety and monitoring component designed for Cummins® diesel engines.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"height: 19.6023px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6023px;\"\u003e\n\u003ctd style=\"height: 19.6023px;\"\u003e \n\u003ch4\u003e\u003cb\u003e1. What is it?\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003ePart is a threshold-based electrical switch (rather than a continuous variable sensor). Installed directly into a pressurized fluid or air passage (such as oil or fuel lines), it opens or closes an internal electrical contact when pressure reaches a specific pre-set threshold.\u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003e2. Core Functions \u0026amp; Technical Features\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBinary On\/Off Signal:\u003c\/b\u003e Unlike a transducer that continuously sends changing pressure values, this switch operates as a simple binary circuit trigger (Normally Open or Normally Closed) to signal whether pressure is above or below safe operating limits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eWarning Light \u0026amp; Gauge Actuation:\u003c\/b\u003e Triggers low-pressure dashboard indicator lamps or chimes to alert the driver immediately when system pressure drops dangerously.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eECM Safety Interlock:\u003c\/b\u003e Transmits a discrete signal to the Cummins® Engine Control Module (ECM) to restrict engine operation or prevent starting under zero-pressure conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCorrosion-Resistant Housing:\u003c\/b\u003e Features a heavy-duty threaded metallic body built to withstand intense engine vibration, high operating temperatures, and harsh engine bay environments.\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\u003ch4\u003e\u003cb\u003e1. False Low Pressure Warning Light \/ Alarm\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The low oil or fluid pressure warning light stays permanently illuminated on the dashboard or flickers erratically at idle, even though physical fluid levels and actual system pressures are completely normal.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Internal electrical contacts become welded closed, oxidized, or stuck due to spring mechanical fatigue.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cb\u003e2. Warning Light Fails to Turn On During Engine Pre-Check\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The pressure indicator light fails to illuminate when turning the ignition key to the \"ON\" position (key-on, engine-off self-test).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Broken internal contacts or open-circuit failure inside the switch preventing circuit ground completion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cb\u003e3. Nuisance Engine Derate or No-Start Condition\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The engine ECM limits horsepower output or prevents starting because it incorrectly detects zero pressure in the monitored line.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e The switch fails to send the required closed-circuit signal to the ECM after the engine cranks and builds operating pressure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cb\u003e4. Fluid Leaking Through Electrical Terminals\u003c\/b\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Oil or fluid moisture found leaking directly out of the electrical connector body or pin area.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Ruptured internal sealing diaphragm allowing pressurized fluid to penetrate the internal electrical housing.\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\u003eManufacturer information\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eCummins®\u003c\/strong\u003e is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.\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 warranty\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":"Cummins®","offers":[{"title":"Default Title","offer_id":49328913023220,"sku":"3408705","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/images_f49823ef-745a-4e70-8c77-6a9d8a7de982.jpg?v=1788545000","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/3408705-genuine-cummins%c2%ae-pressure-switch-for-isb-qsb-engines","provider":"First Truck Parts","version":"1.0","type":"link"}