<p>Keep your CASE 580E or 590L backhoe loader running with reliable power using this 12V Alternator A187873, designed as a direct replacement for 4391 engines. Perfect for avoiding costly downtime, this alternator ensures consistent charging performance to keep hydraulic systems and electrical components operating at peak efficiency.</p><ul><li>Engineered to match OEM specifications for seamless installation and long-term durability</li><li>Compatible with CASE 580E, 590L, and other models requiring A187873 replacement</li><li>12V output delivers stable power for critical operations in construction and agricultural settings</li></ul>
| Parameter | Details |
|---|---|
| Part Name | 12V Alternator |
| Part Number (OEM Reference) | A186125, A187873, AQ187873, Q187873, 3604448, 3604448R, 3604448RX, 3604480RX, 3604480, 3911248, 3920679, 39206791, J920679, 1103174, 1105170, 132000090065, 4029/70017, 700710688, 8003/00355, 402970017, 800300355 |
| Brand Compatibility | CASE |
| 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 can't afford downtime. When your CASE backhoe's alternator fails, you're looking at $3,000-$5,000 in lost productivity daily. Waiting 2-4 weeks for OEM parts isn't an option, and cheap counterfeits often fail within months, leaving you right back where you started. Finding a reliable replacement that fits multiple CASE models? Even harder.
Our 12V Alternator A187873 delivers the same reliability as OEM parts at a fraction of the cost. With 10 years of exporting to 120+ countries, we've supplied thousands of repair centers and fleet operators with components that meet or exceed original specifications. This alternator fits CASE 580E and 590L backhoe loaders with 4391 engines, as well as dozens of other CASE models—making it a versatile solution for your parts inventory.
This alternator is engineered to perform in the toughest conditions—from construction sites in the Middle East to mining operations in Africa. It maintains stable voltage output even under heavy electrical loads, ensuring your backhoe's lights, hydraulics, and electronic systems operate flawlessly during extended work cycles. Whether you're digging trenches, loading trucks, or handling materials, consistent electrical power is non-negotiable.
We focus on the specifications that matter. This alternator features high-grade copper windings for efficient current transfer and reduced heat buildup—a common failure point in inferior units. The rectifier assembly uses premium diodes rated for 10,000+ hours of operation, while the bearing system is sealed to prevent contamination from dust and moisture. Every unit undergoes load testing to ensure it meets the 12V output requirement under full operating conditions, just like the original part.
An underperforming alternator doesn't just leave you stranded—it can damage your battery and electrical system. A 15% drop in output voltage over six months might seem minor, but it forces your battery to compensate, reducing its lifespan by 30-40%. Replacing both an alternator and battery costs 2-3 times more than investing in a quality part upfront. Our ISO-certified manufacturing process ensures consistent performance, meaning you won't face unexpected failures or costly secondary repairs.
We partner only with ISO 9001-certified factories and inspect every incoming component for material quality and dimensional accuracy. Before shipping, each alternator undergoes a 3-point performance test: no-load voltage, full-load current, and ripple factor analysis. Our 3-12 month warranty covers manufacturing defects, and our technical team—with an average of 12 years in the industry—can verify part compatibility within 2 hours. With 10,000+ SKUs in stock at our Guangzhou warehouse, we ship most orders within 2-5 working days via DHL, FedEx, or your preferred carrier.
Send us your requirements -- part number, machine model, quantity, and destination. Our team responds within 24 hours with a competitive quote.
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