1-Wire Alternator Regulator Rubber Port Plug – Compatible with Delco 10SI, 12SI, 21SI, 22SI, 27SI Alternators | Replaces 41-1307, 180-12115, 1987869
New Rubber Port Plug Cap for 1-Wire Alternator Regulators – Delco Compatible
This high-quality rubber plug is designed for blocking the regulator port on 1-wire alternator regulators. Perfect fit for Delco 10SI, 12SI, 21SI, 22SI, 27SI/Type 200 and 202 Series IR/EF Alternators. Ideal for mechanics and rebuilders looking for a snug fit, OEM-level performance, and long-lasting durability.
- Part Number: 41-1307 / 180-12115
- Material: Rubber
- Condition: Brand New
- Quantity: 1 Cap
- For Alternator Types: Delco 10SI, 12SI, 21SI, 22SI, 27SI (Type 200/202 Series)
- Replaces: Delco 1987869, J&N 180-12115
🔧 Compatibility & Unit Numbers:
This part fits a wide range of OEM units including Agco, Case, Caterpillar, Cummins, John Deere, Ford, Hino, Navistar, Komatsu, and more.
Common Lester Numbers: 7127-SE, 7136, 7138, 7160, 7167, 7178-3, 7197, 7289, 7564, 7641, 7850, 8002, 8020, 8070, 8365, 8560 and many others.
📦 Applications:
- Advance Mixer (1988–2003)
- Agco & Agco Allis (1994–2007)
- Case, John Deere, Hino, Navistar, Komatsu
- And hundreds more OEM units and cross-reference models
This is a high-quality aftermarket replacement and is not manufactured by Delco or other OEM brands listed above. For use in professional rebuilds and replacements.