{"product_id":"level-sensor-591-3427-535-6922-fits-for-caterpillar-c4-4-c3-6-engine-d4-cs66b-cs56b-cs14-cs16-ap455-ap655","title":"Level Sensor 591-3427 535-6922 Fits for Caterpillar C4.4 C3.6 Engine D4 CS66B CS56B CS14 CS16 AP455 AP655","description":"\u003ch3\u003eLevel Sensor 591-3427 535-6922 – Replacement for Caterpillar C4.4 C3.6 Engine D4 CS66B CS56B CS14 CS16 AP455 AP655\u003c\/h3\u003e\n\u003cp\u003eAftermarket diesel exhaust fluid (DEF) level sensor engineered for accurate fluid level monitoring and reliable emissions system performance in Caterpillar engine and equipment applications. Precision-manufactured components ensure drop-in compatibility with correct fitment.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 591-3427, 5913427, CA5913427, 535-6922, 5356922, CA5356922\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank Interface:\u003c\/strong\u003e 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuction Fitting Diameter:\u003c\/strong\u003e 3\/8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReturn Fitting Diameter:\u003c\/strong\u003e 5\/16 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Inlet Fitting Diameter:\u003c\/strong\u003e 5\/8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Outlet Fitting Diameter:\u003c\/strong\u003e 5\/8 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeader Height:\u003c\/strong\u003e 11.4 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation Depth:\u003c\/strong\u003e 337.41 mm (~13.28 in)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Length:\u003c\/strong\u003e 15.5 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical Connector:\u003c\/strong\u003e Deutsch DT4 (STD), 4-pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New, aftermarket replacement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Monitors DEF tank fluid level and transmits data to the engine control module to maintain emissions compliance and prevent low-fluid shutdowns across Caterpillar Tier 4 engine and equipment applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEquipment Compatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eNote: Compatibility is provided for reference. Please verify against your part number before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eFits the Following Applications:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCaterpillar Engine: C4.4, C3.6\u003c\/li\u003e\n  \u003cli\u003eCaterpillar Tractor: D4\u003c\/li\u003e\n  \u003cli\u003eCaterpillar Asphalt Paver: AP400, AP455, AP500, AP555, AP600, AP655, PE636\u003c\/li\u003e\n  \u003cli\u003eCaterpillar Compactor: CP12, CP14, CP16, CP56B, CP68B, CP74B, CS12, CS13, CS14, CS16, CS17, CS19, CS56B, CS66B, CS68B, CS74B, CS76B, CS78B\u003c\/li\u003e\n  \u003cli\u003eCaterpillar Motor Grader: 120 GC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This Level Sensor\u003c\/h3\u003e\n\u003cp\u003eThe DEF level sensor is a critical emissions system component in your Caterpillar Tier 4 engine — it continuously monitors fluid level in the DEF tank and feeds real-time data to the ECM to maintain SCR system operation and regulatory compliance. A failed or inaccurate level sensor triggers fault codes, activates warning indicators, and can result in derate conditions or equipment shutdown that halts production on active job sites. This replacement unit delivers:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccurate level monitoring\u003c\/strong\u003e – Engineered to meet the signal output, connector, and dimensional specifications of Caterpillar C4.4 and C3.6 DEF system requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact-fit installation\u003c\/strong\u003e – Direct replacement with correct installation depth, fitting diameters, wire length, and Deutsch DT4 4-pin connector to match Caterpillar equipment specifications without modification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable construction\u003c\/strong\u003e – Built to withstand continuous DEF exposure, thermal cycling, and the demanding duty requirements of Caterpillar paver, compactor, grader, and tractor applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCost-effective solution\u003c\/strong\u003e – Aftermarket quality at a fraction of dealer pricing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Level Sensor 591-3427\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eEssential for Caterpillar C4.4, C3.6 engine, D4 tractor, AP455, AP655 paver, CS66B, CS56B, CS14, CS16 compactor, and 120 GC motor grader DEF system maintenance and level sensor replacement. Keep your Caterpillar equipment delivering full emissions compliance and uninterrupted operation on every job.\u003c\/p\u003e","brand":"Fab Heavy Parts","offers":[{"title":"Default Title","offer_id":41565916627077,"sku":"FN26033184","price":923.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0373\/4886\/8229\/files\/level-sensor-591-3427-535-6922-fits-for-caterpillar-c44-c36-engine-d4-cs66b-cs56b-cs14-cs16-ap455-ap655fab-heavy-parts-2357661.webp?v=1777417987","url":"https:\/\/www.fabheavyparts.com\/en-sa\/products\/level-sensor-591-3427-535-6922-fits-for-caterpillar-c4-4-c3-6-engine-d4-cs66b-cs56b-cs14-cs16-ap455-ap655","provider":"Fab Heavy Parts","version":"1.0","type":"link"}