12V Regulator Alternator 41-8851 42-5729 425729 41-8851 418851 418-851 41-6884
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
12V Regulator Alternator for 41-8851 42-5729 425729 41-8851 418851 418-851 41-6884
This 12V regulator alternator is a direct replacement charging component designed to maintain battery voltage and power electrical systems in compatible equipment. It references OEM cross-reference numbers 41-8851, 42-5729, 425729, 41-8851, 418851, 418-851, and 41-6884 for fitment verification.
Overview
This 12V regulator alternator delivers consistent charging output for engines requiring a reliable power supply. As a 12V regulator alternator, it integrates the voltage regulator and alternator into one unit, simplifying installation and reducing wiring complexity. It is intended for applications that use the cross-referenced OEM part numbers.
Built For Performance
- Integrated voltage regulator maintains stable output under varying engine speeds
- 12-volt design suitable for standard electrical systems
- Direct replacement form factor matches original mounting points
- Cross-reference numbers 41-8851, 42-5729, 425729, 418851, 418-851, and 41-6884 simplify parts lookup
- Robust construction for continuous duty in demanding environments
Fits These Machines
- for applications using OEM part number 41-8851
- for applications using OEM part number 42-5729
- for applications using OEM part number 425729
- for applications using OEM part number 418851
- for applications using OEM part number 418-851
- for applications using OEM part number 41-6884
On-The-Job Use
- Replaces a failed charging unit on industrial or agricultural machinery
- Maintains battery charge during prolonged idle or low-speed operation
- Serves as a drop-in replacement for equipment originally using one of the listed cross-reference numbers
Specs At A Glance
| Voltage | 12V |
| Part Number(s) | 41-8851, 42-5729, 425729, 418851, 418-851, 41-6884 |
Good To Know
Q: How do I confirm this alternator fits my machine? A: Compare your existing part number against the listed cross-references (41-8851, 42-5729, etc.) and verify mounting configuration and connector type before ordering.
Q: What maintenance does this alternator require? A: Keep connections clean and tight, and periodically check belt tension to ensure proper charging performance.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.