Re: Need in Depth Technical Help for my charging s

Posted by John T on December 31, 2006 at 11:52:09 from (66.244.90.5):

In Reply to: Need in Depth Technical Help for my charging syste posted by JayWalt on December 31, 2006 at 10:16:50:

Jay, good advice and description from Jim there, I may have a slightly different approach, heres my "first impression"

1) If that Voltage Regulator reallyyyyyyy has 4 terminals as you implied, especially if ones off on a side or the bottom all by itself, sounds like you have a 4 terminal (BAT ARM FLD LOAD) Voltage Regulator instead of the 3 terminal (BAT ARM FLD) VR but thats NOT a problem regardless which you have, we can make it work. Often on those its the ARM terminal thats off all by itself, hope you have it wired correct???

BAT to Load (NOT to battery/starter) side of
Ammeter
ARM/GEN to gennys larger ARM post
FLD to gennys smaller FLD Post
LOAD wires up to the dash and feeds hot batery
voltage to the BAT input terminal on the light
and ignition switches.

In the event its really only a 3 terminal (BAT ARM FLD) VR, loads like lights and ignition receive their hot batetry input voltage from the ammeters Load terminal (same that wires to BAT on VR) instead of from the VR's LOAD terminal as just described.

The 3 terminal VR wires as follows:

BAT to load (NOT battery/starter) side of
ammeter
ARM/GEN to gennys ARM post
FLD to gennys FLD post

Nowwwwww heres the deal, if its really a 4 terminal, or even if only a 3 terminal VR, it may have 3 instead of just 2 internal relay/coils. Ones the Cutout Relay, ones the Voltage Control Relay, ones the Current Control Relay. If it just has 2, as Jim noted, ones the Cutout Relay and the other is often EITHER a Current Control orrrrrr a combination Current and Voltage Control

SORRY not knowing what VR you have and with no specs or data I simply dont like to give advice on tweaking any VR here on the net, its hard enough if on my own tractor and armed with a good VOM AND IT MAY INVOLE ADJUSTING SENSITIVE AIR GAPS IN CONTACTS AND/OR BENDING TABS OR ADJUSTING SPRING TENSIONS EWWWWWWWWWWWW NOT A JOB FOR AN AMATEUR ESPECIALLY ABSENT ANY SPECS OR DATA.

HERES MORE THOUGHTS: While EITHER a 3 or 4 terminal VR can be wired n made to work, the 4 terminal is supposedly better at finer regulation and better at preventing potential overcharging PROVIDED its wired and used as intended.....THEREFORE if it really is a 4 terminal and ifffff lights n ignition are now fed from the ammeter versus the LOAD terminal on a 4 terminal VR IT MAY HELP IF YOU REWIRE THE LOADS OFF THE VR LOAD TERMINAL !!!!!!!

Keep an eye on the battery acid to insure its not boiling over nor is there a lot of Hydrogen or Sulfur smelling outgassing, indicative of overcharging. Right after start up Id expect the charging system to go at full charge say maybe 7 or so volts butttttttt after a long time if no lights are used Id expect it to back off to more like 6.5 or so volts. If it stays at 7 volts constantly the VR may be at fault or need adjusted and/or the battery may be the problem cuz a bad cell may be causing it to contiuinually try n charge at max rate?? Is there electrolyte above all the plates and no cells have a gray or milky color????

NOTE AND DISCLAIMER: Im NOT an IHC man, just knee deep in theory buttttttt seems the 4 terminal VR's are more on the 12 volt systems????? Bob and Bob M and Jim are way more knowledgeable on what systens what tractors used, soooooooooooo if they say they didnt use 4 terminal VR's on 6 volt systems, BELIEVE THEM !!

That being said, even if its a 3 terminal VR, she may still be overcharging or the battery may be at fault and the advice regarding that still holds true. Still, if she dont boil over and the battery is good n shes not outgassing badly, YOU MAY NOT EVEN HAVE A PROBLEM??????

John T

Replies:

• Re: Need in Depth Technical Help for my charging s JayWalt 12:05:21 12/31/06 (1)
  • Re: Need in Depth Technical Help for my charging s John T 12:51:27 12/31/06 (0)

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