Get your CASE backhoe loader back to full power with this reliable 12V Alternator A187873 replacement, engineered to restore consistent charging for 580E and 590L models running the 4391 engine. Designed to meet OEM specifications, this alternator eliminates frustrating downtime caused by electrical system failures, ensuring your equipment stays operational when you need it most.
Perfect for fleet managers and repair shops needing a cost-effective alternative to overpriced OEM parts, with the same reliability to keep your machinery working through tough jobs.
| Parameter | Details |
|---|---|
| Part Name | 12V Alternator |
| Replacement Part Numbers | A186125, A187873, AQ187873, Q187873, 3604448, 3604448R, 3604448RX, 3604480RX, 3604480, 3911248, 3920679, 39206791, J920679, 1103174, 1105170, 132000090065, 4029/70017, 700710688, 8003/00355, 402970017, 800300355 |
| Voltage | 12V |
| Condition | New Aftermarket |
| Warranty | 3-12 months against manufacturing defects |
| Brand | Applicable Models |
|---|---|
| CASE Dozer | 1150E, 1150H, 1150H_IND, 1550, 650, 650G, 650H, 650K, 750H, 750K, 850D, 850H, 850K |
| CASE Track Loader | 1155E, 855D |
| CASE Excavator | 170C, 220B |
| CASE Backhoe Loader | 480E, 480E LL, 480F, 480F LL, 580E, 580K, 580L, 580M, 580SE, 580SK, 580SL, 580SM, 590, 590L, 590SL, 590SM, 680K, 680L, 780C, 780D |
| CASE Skid Steer Loader | 1818, 1835, 1835B, 1835C, 1840, 1845C, 1896, 40XT, 450C, 455C, 60XT, 70XT, 75XT, 85XT, 90XT, 95XT |
| CASE Tractor | 2096, 4000, 5000, 5120, 5130, 5140, 5150, 5220, 5230, 5240, 5250, 550, 550E, 550G, 550H, 550H-IND, 6030, 8825, 8825HP, 8830, 8840, 8850, MX100, MX110, MX120, MX135 |
| CASE Trencher | 360, 560, 660, 760, 860, 960, DH4, DH4B, TF300 |
| CASE Wheel Loader | 570LXT, 570MXT, 621, 721, 821, 921, W11B |
| CASE Forklift | 584E, 585E, 585G, 586E, 586G, 588G, 686G, 686GXR, 688G |
| CASE Haytool | 5500, 4000, 5000, 8820, 8830 |
Construction sites don't wait for broken equipment. When your CASE backhoe loader's alternator fails, you're looking at downtime costing thousands in lost productivity. OEM parts take 2-4 weeks to arrive and cost 30-50% more, while counterfeit alternators often fail within months, leaving you stranded again. Finding the right replacement for multiple CASE models can mean contacting multiple suppliers—until now.
Our 12V Alternator A187873 is built to meet the same performance standards as CASE original parts, but without the premium price tag or long lead times. As a professional supplier with 10 years of global export experience, we stock over 10,000 SKUs in our Guangzhou warehouse, including this CASE 4391 engine alternator. Every unit is tested before shipment to ensure it delivers reliable power for your 580E backhoe or 590L loader, even in the toughest job site conditions.
This 12V alternator is engineered for the demanding environments CASE equipment operates in—from construction sites and mining operations to agricultural fields and port logistics. It maintains consistent charging output even under heavy electrical loads, ensuring your backhoe's lights, hydraulics, and electronic systems perform when you need them most. Whether you're digging trenches with a 580E or loading materials with a 590L, this alternator keeps your machine powered through long workdays.
Every component of this alternator is designed for durability. The precision-wound stator and rotor deliver efficient power conversion, while high-quality bearings reduce friction and extend service life. The voltage regulator maintains stable output (12V) regardless of engine speed, protecting sensitive electronics from voltage spikes. Sealed bearings and weather-resistant housing prevent moisture and dust ingress—critical for equipment working in muddy or dusty conditions. Direct OEM fitment ensures easy installation, so your machine spends less time in the shop and more time on the job.
Opting for a cheap, untested alternator might save money upfront, but the hidden costs add up fast. A failed alternator can strand your equipment in the field, requiring expensive tow services and lost work hours. Counterfeit parts often have 1.5x shorter lifespans, meaning you'll be replacing them again sooner. Our ISO-certified manufacturing process ensures this CASE 590L alternator replacement meets OEM specifications, reducing the risk of premature failure and unplanned downtime. When you factor in longer service life and reliable performance, the total cost of ownership is significantly lower than with inferior alternatives.
We stand behind every part we sell with verifiable quality and service commitments. Our alternators come from ISO-certified factories, with incoming material inspections and pre-shipment performance testing to ensure OEM-equivalent quality. We offer a 3-12 month warranty against manufacturing defects, so you can buy with confidence. Our 20+ person technical team provides part verification within 2 hours, helping you confirm compatibility for your specific CASE model. With 10 years of export experience and stock in our Guang
Not sure if this part fits your machine? Send us your machine model number and serial number via WhatsApp or email -- our specialists will verify compatibility within 2 hours.
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