Posted by John T on March 13, 2010 at 13:03:54 from (71.55.30.174):
In Reply to: farmall m charging? posted by ratnickwi on March 13, 2010 at 10:54:48:
IFFFFFFFF the Cutout Relay is latching in/closed, then the gennys output on its ARM post is effectively tied to the battery via closed cutout relay and ammeter and Id expect it to be close to battery voltage less the small ammeter and relay and wiring voltage drop...
Ifffffffff the wiring is correct and the ammeter is working, that 7 to 8 amps you mention sounds fine and after running a while Id expect it to drop back. Buttttttttt if the batterys taking a 7 amp charge Id expect the battery voltage to be rising from 6.3 to 6.5 to 7 or so (your stories arent jiving lol)
To me an accurate way of seeing if the system is charging is a voltmeter on the battery. Id expect it to be 6.3 volts not running but rise to at least 6.5 to near 7 or a tad more at fast RPM once started.
MY THOUGHTS: Not knowing how accurate your meter is I wonder if the cutout relay is pulling in?? (That could explain a difference in battery versus genny voltage) If the genny isnt putting out enough voltage the cutout relay may not latch in to tie the genny to the battery. (but that 7 charging amps sounds like its working???)
SEE WHAT HAPPENS IF YOU TEMPORARILY DEAD GROUND THE GENNYS FLD POST??? That puts the genny in high charge and if the battery voltage rises then (but not otherwise) I suspect the LHBD switch is bad,,,,,,,,or isnt well grounded,,,,,,,or the wires bad from FLD on genny to the LHBD switch. If shes still not charging at fast RPM with the FLD dead grounded, leave it grounded and by pass jump across the relay (connect BAT to GEN/ARM) n see if she charges then????? With the FLD grounded and the relay by passed you have effectively ruled out any relay or LHBD switch problems so if she still dont charge (if all is wired right) the genny must be at fault..
The closer the third brush is to the fixed brush the higher the gennys output, maybe try it a bit closer????????
Work through my Troubleshooting Procedure to diagnose the problem
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
