glcaines
New member
I have a 2000 John Deere 4600 tractor. While using the tractor, I smelled a strong odor of burning insulation and the charge light came on and the tachometer went dead. I disconnected all of the wires from the alternator and checked the output. It was dead - no output. I replaced the alternator with a new Romaine Electric 40-amp alternator. Now, the charge light is extinguished and the alternator is charging the battery. However, the tachometer doesn't work correctly. When the engine is idling it reads ~750 RPM. At very high RPM it reads ~800 RPM. It does respond to increases in RPM, but only slightly and very slowly. Any ideas? Faulty new alternator?
Last edited: