{"product_id":"2588342c91-genuine-horton®-2-speed-fan-clutch","title":"2588342C91 | Genuine Horton® 2 Speed Fan Clutch","description":"\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: 2 Speed Fan Clutch\u003cbr\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: New\u003cbr\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e: Horton®\u003cbr\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e: 2588342C91\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003eCompatible Vehicles \u0026amp; Engines\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart number serves as an OEM fitment for medium- and heavy-duty International \/ Navistar trucks equipped with high-horsepower diesel engines:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHeavy-Duty Highway Trucks:\u003c\/b\u003e International ProStar, LT Series, LoneStar, RH Series.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eVocational \u0026amp; Severe Duty Trucks:\u003c\/b\u003e International WorkStar, HV Series, HX Series, PayStar.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCompatible Engine Platforms:\u003c\/b\u003e Navistar N13 \/ A26, MaxxForce 11 \/ 13, and Cummins ISX15 \/ X15 diesel 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\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003e2-Speed Fan Clutch \u003c\/b\u003eis a pneumatic\/electromagnetic fan drive engineered for heavy-duty commercial trucks (primarily International \/ Navistar). Unlike traditional \"on\/off\" fan clutches, it operates at two distinct engaged speeds to maximize engine efficiency and thermal management.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \n\u003cp\u003e\u003cb\u003e1. What is it?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003ePart is an OEM Horton® DriveMaster 2-speed fan clutch mounted between the engine crankshaft pulley and the cooling fan blade. It dynamically controls the rotational speed of the radiator fan based on real-time engine cooling demands communicated by the Engine Control Module (ECM).\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e2. Core Functions \u0026amp; Operation Modes\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOFF Mode (Disengaged):\u003c\/b\u003e When the engine is cold or under low thermal load, the fan stays disengaged, saving horsepower and reducing fuel consumption.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eLow Speed Mode (Eddy-Current Drive):\u003c\/b\u003e For minor cooling demands (such as light air conditioning load or mild ambient temperatures), the fan engages at a reduced speed using magnetic eddy currents. This provides quiet, low-power cooling without fully locking up.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFULL Speed Mode (Full Air Lock):\u003c\/b\u003e When high engine coolant, intake manifold, or transmission temperatures are detected, air pressure fully locks the clutch, spinning the fan at maximum engine RPM for maximum airflow.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eBenefits:\u003c\/b\u003e Reduces overall engine noise, extends fan belt life, improves fuel economy, and reduces drag on the engine compared to single-speed clutches.\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\u003e\u003cb\u003e1. Engine Overheating Under Heavy Load or Long Incline\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Coolant temperatures quickly spike into the red zone when hauling heavy loads or climbing hills.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e The clutch fails to engage into \u003cb\u003eFull Lock Mode\u003c\/b\u003e due to air seal leakage, insufficient system air pressure, or worn friction discs that slip under torque.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e2. Fan Constantly Engaged at Maximum Speed (Stuck ON)\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Extreme fan roar, loss of engine horsepower, and noticeable drop in fuel economy at high highway speeds.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Loss of control air pressure (default failsafe mode locks the clutch ON), a failed air solenoid valve, or mechanical binding\/bearing seizure inside the clutch hub.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e3. Failure of the Low-Speed (Eddy-Current) Mode\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e The fan stays completely idle during low-cooling demand scenarios (like idling with A\/C on), causing poor A\/C performance or sudden, harsh transitions straight into high-speed full lock.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Electrical failure of the electromagnetic coil circuit or corrosion\/damage to the internal eddy-current drive plates.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e4. Excessive Air Leaks from the Fan Hub\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e An audible continuous air leak from behind the cooling fan when the engine is running or when air pressure builds up.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Worn internal air seals or damaged air-cartridge seals inside the Horton shaft assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003e5. Mechanical Noise \u0026amp; Vibration (Grinding or Squealing)\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSymptom:\u003c\/b\u003e Loud metallic grinding, squealing, or front-engine vibration that increases with engine RPM.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eCause:\u003c\/b\u003e Worn internal ball bearings or dry friction material causing metal-on-metal contact.\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\u003c\/p\u003e\n\u003cp\u003eHorton® is a world-renowned manufacturer of high-grade engine cooling solutions for the trucking industry for over 65 years. This company believes that improved airflow translates to better performance, reduced emissions, more significant fuel savings, and happy customers. Horton offers best-in-class fans, fan drives, and clutches for on-highway big rigs like heavy-, medium-, and light-duty trucks, R.V.s, buses, refuse vehicles, commercial vehicles, and other applications. This company also takes pride in its off-highway and heavy-duty products, including sweepers, agricultural tractors, mining trucks, aerial work platforms, excavators, generators, articulated vehicles, and industrial compressors. Made to operate in harsh environments, these Horton products withstand temperature extremes, dust, dirt, chemicals, as well as stop-and-go driving. For truck parts that consume less fuel, last longer, and run quieter, trust no other brand than Horton.\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":"Horton®","offers":[{"title":"Default Title","offer_id":49108388217076,"sku":"2588342C91","price":870.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/1479\/5764\/files\/3879329c3-genuine-international-drive-fan-clutch-advanced-truck-parts-46017.jpg?v=1786384938","url":"https:\/\/firsttruckparts.com\/en-ca\/products\/2588342c91-genuine-horton%c2%ae-2-speed-fan-clutch","provider":"First Truck Parts","version":"1.0","type":"link"}