Solarhome 12V 20A Alternator for John Deere Tractors CH15587 — Direct-Fit Replacement, OEM Cross-Reference

If your tractor or lawn machine has a weak battery, dim lights, or electrical accessories that cut out, this Solarhome alternator offers a straightforward replacement option. It’s specified to match common OEM part numbers and fits a wide range of John Deere models and Yanmar engines, making it a practical choice for maintenance shops, hobby farmers, and property owners who service their equipment.

Which machines will this alternator work with?

This alternator is compatible with a long list of John Deere tractors and mower models as well as Yanmar engines used in equipment. Cross-reference your existing part number or engine model to confirm fit before ordering.

• Direct fit for John Deere models such as 1070, 4010, 4110, 4115, 2500 series, X485, X595, X740, X744 and many more.
• Fits Yanmar engines: 3TNA68, 3TNA72, 4TN84, 3TN82, 3TN84, 4TN82.
• Matches multiple OEM numbers including CH15587, AM877557, MIA10338, SE501822, and others for easy identification.

How does the charging output suit my electrical needs?

Rated at 12 volts and 20 amps, this alternator supplies steady charge for standard tractor electrical systems and typical accessory loads. It’s optimized for charging the battery and maintaining electrical system voltage under normal operating conditions.

• Nominal output: 12V, 20A — suitable for lighting, ignition, and common accessories.
• Designed for steady voltage regulation to maintain battery state-of-charge.
• Intended to replace worn or underperforming factory units with like-for-like output.

What part numbers and cross-references does it replace?

This unit covers an extensive list of replacement codes, making it easier to match when servicing older machines or those with aftermarket parts. Use any of the listed numbers to verify compatibility with your existing alternator or parts catalogs.

• Primary reference: CH15587.
• Additional cross-references: AM877557, MIA10338, SE501822, SE501843, MIA10312, AM879144, AM877958, M805471, M805473, LS22101, 400-58013, 10939N, WA10939, 309-10939.
• Keep your original part number handy when ordering to ensure correct match.

How easy is installation and what should I check during swap?

Installation follows the same basic steps as most tractor alternator replacements: disconnect battery, remove drive belt and mounting hardware, swap unit, and reconnect. Basic hand tools are usually sufficient, but always follow vehicle service guidelines for torque and wiring checks.

• Disconnect battery negative before starting to prevent shorts.
• Inspect belt, tensioner, and electrical connectors while alternator is removed.
• Test charging voltage after installation to confirm correct operation.

Who is this for: Owners, fleet managers, and repair shops servicing John Deere tractors, ride-on mowers, and Yanmar-powered equipment who need a reliable, OEM-referenced alternator replacement. If you require a like-for-like 12V, 20A unit that matches common OEM numbers and fits many model years, this Solarhome alternator is a practical, service-friendly option. Always verify compatibility with your machine’s part number or engine model before purchase and consult a technician if you’re unsure about installation.