{"product_id":"cat-365c-385b-fan-motor-2478978-247-8978","title":"CAT 2478978 (247-8978) Fan Motor | Fits 365C 385B Excavator","description":"\u003ch2\u003eCAT 2478978 (247-8978) Fan Motor | Fits 365C 385B Excavator\u003c\/h2\u003e\n\u003cp\u003ePremium engine fan motor designed as a direct OEM-compatible replacement for Caterpillar 365C and 385B excavators. Built to deliver reliable cooling system performance and long service life in demanding mining, quarry, and heavy excavation applications.\u003c\/p\u003e\n\u003ch3\u003eProduct Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 2478978 \/ 247-8978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fit:\u003c\/strong\u003e No modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Performance:\u003c\/strong\u003e Meets or exceeds original Caterpillar specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Precision-engineered for long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Suitable for mining, quarry, and heavy excavation projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 2478978 \/ 247-8978\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine Fan Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand Compatibility:\u003c\/strong\u003e Caterpillar (CAT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Engine Cooling System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 Months\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Models\u003c\/h3\u003e\n\u003cp\u003eThis fan motor fits the following Caterpillar excavators:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCaterpillar 365C Excavator\u003c\/li\u003e\n\u003cli\u003eCaterpillar 385B Excavator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngine Cooling Fan Drive System\u003c\/li\u003e\n\u003cli\u003eHydraulic Oil Cooling System\u003c\/li\u003e\n\u003cli\u003eRadiator Cooling and Heat Dissipation\u003c\/li\u003e\n\u003cli\u003eMining, Quarry, and Heavy Excavation Projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose This Fan Motor?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eQuality Guaranteed - Manufactured to meet OEM standards\u003c\/li\u003e\n\u003cli\u003eReady to Ship - In stock and available for immediate dispatch\u003c\/li\u003e\n\u003cli\u003eExpert Support - Technical assistance available\u003c\/li\u003e\n\u003cli\u003eCompetitive Pricing - Cost-effective alternative to dealer parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the symptoms of a failing engine fan motor on CAT 365C or 385B excavators?\u003c\/strong\u003e\u003cbr\u003eA: Common signs include engine overheating during normal operation, the cooling fan not spinning or spinning slowly, hydraulic-driven fan failing to respond to temperature changes, unusual noise (grinding or whining) from the fan motor area, and visible hydraulic oil leakage around the fan motor. The CAT 365C and 385B are large excavators used in mining, quarry, and heavy excavation — overheating in these machines can lead to catastrophic engine failure, turbo damage, and extremely expensive downtime.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 2478978 fit both excavator models?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the 2478978 (247-8978) is designed as a direct OEM-compatible replacement for the CAT 365C and 385B excavators. These models share the same fan motor mounting and hydraulic drive architecture. Contact us with your excavator serial number to confirm exact compatibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does the fan motor do on these large CAT excavators?\u003c\/strong\u003e\u003cbr\u003eA: The fan motor is a hydraulic-driven motor that spins the engine cooling fan. It is controlled by the engine cooling system — as coolant temperature rises, hydraulic flow to the fan motor increases, speeding up the fan to dissipate heat. On large excavators like the 365C and 385B, the cooling system works under extreme load — a failing fan motor causes rapid engine overheating, risking warped cylinder heads, turbo failure, and engine shutdown.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I check the hydraulic system when replacing this fan motor on a 365C or 385B?\u003c\/strong\u003e\u003cbr\u003eA: Absolutely. Before installing the new fan motor, inspect the hydraulic lines, fittings, and cooling system for contamination, blockages, or damaged O-rings. Flushing the hydraulic circuit and replacing the hydraulic filter is strongly recommended to prevent contaminant-driven failure of the new motor. Large excavators in mining and quarry applications operate in extreme contamination conditions — skipping the flush will likely destroy the new motor within hours.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What type of hydraulic oil is recommended for the fan motor circuit on CAT 365C and 385B?\u003c\/strong\u003e\u003cbr\u003eA: Caterpillar specifies Cat HYDO Advanced 10W or 30W hydraulic oil for the fan motor hydraulic circuit. Using non-CAT approved hydraulic fluids can cause accelerated wear, seal failure, and void the warranty. In demanding mining and quarry applications, hydraulic oil and filter changes should be performed more frequently than the standard interval.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this is the correct fan motor for my CAT excavator?\u003c\/strong\u003e\u003cbr\u003eA: Check the part number on your current fan motor — if it reads 2478978 or 247-8978, this is the correct replacement. If the label is worn or missing, provide your excavator serial number and we will verify compatibility before you order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this fan motor come with mounting hardware or gaskets included?\u003c\/strong\u003e\u003cbr\u003eA: The fan motor is supplied as a complete unit. Depending on your excavator configuration, you may need separate mounting bolts, hydraulic fittings, gaskets, or O-rings. Contact us with your serial number and we will confirm exactly what is included and what additional parts you may need for installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the warranty on this engine fan motor?\u003c\/strong\u003e\u003cbr\u003eA: This fan motor comes with a 12-month warranty covering manufacturing defects. The warranty does not cover damage caused by contaminated hydraulic oil, improper installation, failure to flush the hydraulic system, or using non-CAT approved hydraulic fluids.\u003c\/p\u003e\n\u003cp\u003eLooking for this fan motor? Contact us today for pricing, availability, and lead time information.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\"\u003eRequest a Quote\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003eExplore our full range of \u003ca href=\"\/collections\/construction-machinery-caterpillar\"\u003eCaterpillar fan motors\u003c\/a\u003e.\u003c\/p\u003e","brand":"Caterpillar","offers":[{"title":"Default Title","offer_id":46655799230620,"sku":"CAT-FM-2478978","price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/7385\/0524\/files\/247-89781.jpg?v=1775740037","url":"https:\/\/hepumpstore.com\/products\/cat-365c-385b-fan-motor-2478978-247-8978","provider":"HEPUMP","version":"1.0","type":"link"}