{"product_id":"cat-4w5479-4w-5479-hydraulic-gear-pump-d8l-d9l-988b","title":"CAT 4W5479 (4W-5479) Gear Pump | Fits 589  834B  836  988B  988F  D10N  D8L  D9L  D9N  D9R  PM-565","description":"\u003cp\u003ePremium hydraulic gear pump designed as a direct OEM-compatible replacement for a robust fleet of Caterpillar (CAT) heavy equipment, including large track-type tractors, wheel loaders, and cold planers. Engineered to deliver top-tier volumetric efficiency, stable high-pressure performance, and an extended service life in severe-duty mining, quarrying, and earthmoving applications.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 4W5479 \/ 4W-5479\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Fit OEM Replacement:\u003c\/strong\u003e Form, fit, and function align perfectly with original Caterpillar engineering standards, guaranteeing a seamless drop-in installation without any field modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Construction:\u003c\/strong\u003e Features high-strength housings and precision-hardened internal gears to endure massive hydraulic shock loads and continuous operating pressures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Efficiency:\u003c\/strong\u003e Advanced pressure-balanced sealing minimizes internal friction and fluid bypass, optimizing system responsiveness and maximizing equipment fuel efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse: collapse; margin: 15px 0;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2; border-bottom: 2px solid #dddddd;\"\u003e\n      \u003cth style=\"padding: 10px; text-align: left; border: 1px solid #dddddd;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"padding: 10px; text-align: left; border: 1px solid #dddddd;\"\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e4W5479 \/ 4W-5479\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHeavy-Duty Hydraulic Gear Pump\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eBrand Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eCaterpillar (CAT)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eMain Hydraulic Steering, Transmission, or Implement System\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003eHigh-Strength Wear-Resistant Alloys \u0026amp; Rugged Cast Structures\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"border-bottom: 1px solid #dddddd; background-color: #f9f9f9;\"\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"padding: 10px; border: 1px solid #dddddd;\"\u003e12 Months Warranty\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Equipment\u003c\/h2\u003e\n\u003cp\u003eThis premium gear pump is precision-engineered to provide outstanding reliability across multiple high-performance Caterpillar equipment lines:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Track-Type Tractors (Bulldozers):\u003c\/strong\u003e D8L \/ D9L \/ D9N \/ D9R \/ D10N\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Wheel Loaders \u0026amp; Wheel Dozers:\u003c\/strong\u003e 988B \/ 988F \/ 834B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Soil \u0026amp; Landfill Compactors:\u003c\/strong\u003e 836\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Road Cold Planers:\u003c\/strong\u003e PM-565\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCaterpillar Pipelayers:\u003c\/strong\u003e 589\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy Equipment Steering \u0026amp; Powertrain Hydraulics:\u003c\/strong\u003e Delivers unyielding fluid flow to critical systems, ensuring precise dozer blade control, smooth loader lifts, and responsive machine articulation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Hour Mining \u0026amp; Earthmoving Cycles:\u003c\/strong\u003e Specifically built to handle the intense, abusive cycles found in rock quarries, bulk material handling, and remote mining sites.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Fluid Power Restoration:\u003c\/strong\u003e Corrects slow cycle times, excessive internal heat, and hydraulic pressure drop, fully updating your machine back to standard OEM operating specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose Our Aftermarket CAT Pumps?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGuaranteed OEM Quality:\u003c\/strong\u003e Manufactured under global ISO 9001 certified conditions to mirror original CAT technical profiles and structural integrity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCost-Effective Solution:\u003c\/strong\u003e Secure original equipment dependability and matching technical outputs at an exceptionally competitive aftermarket budget.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReady to Ship:\u003c\/strong\u003e Maintained in stock for immediate international distribution, effectively cutting down your costly fleet or job site downtime.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry-Leading Support:\u003c\/strong\u003e Backed by a full 1-year warranty and supported by an experienced team of heavy machinery hydraulic system engineers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: Will this 4W5479 pump fit both my D9 bulldozer and 988B wheel loader without adjustment?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, the 4W-5479 gear pump is standardly integrated into several large-chassis CAT machines. The mount pattern, shaft dimensions, and port entries are identical, creating an ideal cross-model drop-in replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: What is the best way to extend the service life of this new hydraulic gear pump?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Hydraulic health is all about cleanliness. We strongly advise draining the reservoir, flushing old lines to extract trapped wear particles, replacing hydraulic filters, and utilizing clean oil before priming the pump.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: How do you verify the quality of these aftermarket CAT pumps?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Every pump undergoes full dynamic testing on our calibrated hydraulic test benches. We check volumetric efficiency, internal sealing, and maximum load capacity to eliminate out-of-box technical anomalies.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background-color: #f9f9f9; border-left: 4px solid #0056b3; padding: 15px; margin-bottom: 15px;\"\u003e\n  \u003cp\u003e\u003cstrong\u003eQ: What express shipping options are available for emergency machine down states?\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e We provide quick processing for urgent orders. We work closely with air cargo channels and major global couriers (DHL, FedEx, UPS) to coordinate expedited global delivery to your exact job location.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003cdiv style=\"text-align: center; background-color: #f4f6f8; padding: 15px; border-radius: 6px; margin: 25px 0;\"\u003e\n  \u003cspan style=\"font-size: 16px; color: #333;\"\u003eExplore our full range of heavy-duty hydraulic pumps:\u003c\/span\u003e \n  \u003cbr style=\"margin-bottom: 5px;\"\u003e\n  \u003ca href=\"\/collections\/gear-pump-caterpillar\" style=\"color: #0056b3; font-weight: bold; text-decoration: underline; font-size: 17px;\"\u003e\n    View All Caterpillar Gear Pumps »\n  \u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"text-align: center; margin-top: 30px;\"\u003eNeed a Quote for CAT 4W5479?\u003c\/h3\u003e\n\u003cp style=\"text-align: center;\"\u003eContact us today for the latest pricing, bulk discounts, and shipping availability.\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-bottom: 30px;\"\u003e\n  \u003ca href=\"\/pages\/contact\" style=\"background-color: #ffcc00; color: #000; padding: 12px 25px; text-decoration: none; font-weight: bold; border-radius: 4px; display: inline-block;\"\u003eRequest a Quote\u003c\/a\u003e\n\u003c\/p\u003e","brand":"HEPUMP","offers":[{"title":"Default Title","offer_id":47104624525468,"sku":null,"price":0.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/7385\/0524\/files\/caterpillar-4w-5479-hydraulic-gear-pump-heavy-machinery-1.jpg?v=1782310292","url":"https:\/\/hepumpstore.com\/products\/cat-4w5479-4w-5479-hydraulic-gear-pump-d8l-d9l-988b","provider":"HEPUMP","version":"1.0","type":"link"}