234279 2575503S AM102596 Voltage Regulator for John Deere 110 120 140

Product Overview

This voltage regulator ensures stable charging output for the battery on John Deere lawn and garden tractors. It converts alternator AC voltage to regulated DC voltage to prevent overcharging or undercharging. Essential for maintaining reliable starting and electrical system health on models 110, 120, and 140.

Key Features & Performance

• Solid-state design with no moving parts for long-term reliability
• Regulates voltage output within safe range (13.5–14.5V)
• Direct replacement for OEM units 234279, 2575503S, AM102596
• Weather-resistant housing protects against moisture and debris
• Prevents battery damage from voltage spikes

Fitment & Compatibility

• John Deere 110 (1963–1974)
• John Deere 120 (1965–1974)
• John Deere 140 (1967–1974)
• Also fits certain John Deere 100-series tractors with similar electrical systems

Common Uses

• Replacement for failed or erratic voltage regulators on vintage John Deere garden tractors
• Restoring charging system function during tractor restoration projects
• Annual maintenance to prevent electrical system failures during mowing season

Technical Specifications

• Part Number(s): 234279, 2575503S, AM102596
• Type: Solid-state voltage regulator
• Input: AC from alternator
• Output: DC regulated 13.5–14.5V
• Mounting: 2-hole flange mount

Frequently Asked Questions

Q: Will this voltage regulator work on a John Deere 140 with a Kohler engine? A: Yes, it is designed for the 140 series regardless of engine brand, as long as the electrical system uses the standard John Deere regulator setup.

Q: How do I test if my old voltage regulator is bad? A: Measure battery voltage at idle – if it exceeds 15V or stays below 12.5V with engine running, the regulator likely needs replacement.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.