12V Alternator A187873 for CASE Excavators & Loaders – Direct OEM Replacement

Product Specifications

Compatible Models

Tired of Alternator Failures on Your CASE 480E or 220B? Get the Reliable A187873 Alternator Replacement Today

Every unplanned downtime on a CASE backhoe loader or excavator costs hundreds to thousands in lost productivity — especially when it’s caused by an alternator failure during critical earthmoving or trenching work. OEM parts often take 2–4 weeks to arrive, while low-cost imitations fail within months, causing repeat shutdowns and damaging battery systems. You need a part that fits perfectly, delivers stable 12V output, and ships fast — without sacrificing reliability.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This A187873 alternator is engineered to match original CASE specifications for voltage regulation, pulley alignment, and mounting interface. Built in ISO-certified factories and tested for continuous 12V output under load before shipment, it supports high-demand operations like extended backhoe loader cycles or multi-shift excavator use. With 10 years’ global export experience and over 10,000 SKUs in stock, XUNPO supplies this exact replacement to repair centers across North America, Southeast Asia, and the Middle East — where uptime is non-negotiable.

Where This Part Works

This 12V alternator operates continuously in harsh environments: dusty construction sites, humid port terminals, abrasive mining quarries, and high-vibration demolition zones. It maintains stable charging across wide temperature ranges (-20°C to +85°C) and compensates for fluctuating loads from hydraulic pumps, lighting systems, and onboard monitors. Whether powering a CASE 580SM on a municipal sewer project or a 170C excavator in agricultural land clearing, consistent alternator performance prevents battery drain, ECM resets, and unexpected stalling — making it essential for any CASE machine with engine models 4390, 4391, 6590, or PX170.

Engineering Details That Matter

The rotor uses precision-wound copper windings with Class H insulation rated for 180°C, ensuring thermal stability during prolonged high-load operation. The voltage regulator is solid-state and calibrated to ±0.25V tolerance, preventing overcharging that degrades lead-acid batteries. Bearings are sealed deep-groove types with NSK-grade grease, rated for 5,000+ hours under radial loads up to 120N. Housing dimensions match OEM tolerances within ±0.1mm, guaranteeing direct bolt-on installation without adapter plates or bracket modifications. Surface finish includes electroplated zinc-nickel coating (ASTM B633, Type IV), providing 720-hour salt-spray resistance for corrosion-prone coastal or winter-de-icing applications.

The Real Cost of Wrong Parts

A $45 counterfeit alternator may seem economical — but if it fails after 3 months, you pay again for labor, tow fees, and lost billable hours. Industry data shows unqualified replacements cause 68% of repeat electrical failures in CASE machines, leading to average downtime of 11.3 hours per incident. Genuine OEM-equivalent parts like this A187873 alternator reduce total cost of ownership (TCO) by extending service intervals and eliminating cascading damage to batteries and control modules. When measured over 24 months, our verified aftermarket alternative delivers 92% lower TCO than low-tier copies — backed by ISO 9001-compliant production and strict adherence to CASE engineering drawings.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually packed in rigid cardboard box with molded anti-static foam cradle and moisture barrier lining
• Standard delivery: 2–5 working days for in-stock items
• Shipping options: Express (DHL/FedEx/UPS), air freight, or sea freight — selected per order volume and urgency
• Real-time tracking number provided upon dispatch
• Minimum order quantity: 1 piece — no bulk requirement

Get Your A187873 Alternator Now

Your CASE machine isn’t generating revenue while waiting for parts. Every hour of delay adds cost — not savings. Send us your part number, machine model (e.g., “CASE 480E”), and required quantity today. We’ll reply with a competitive quote within 24 hours. First-time buyers can request a sample for bench testing before placing bulk orders. Stock is available now — ship tomorrow.

Frequently Asked Questions