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Farmall & IHC Tractors Discussion Forum
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cutout vs. relay

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bnowen

08-28-2007 21:02:28




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My C is not charging even with a new generator and battery. The ampmeter never moves even thoguh hooked up per manual. I was trying to buy a cutout relay and a seller has a regulator on ebay. I asked him if it was for a magneto (cutout) or a regulator. He respoonded that it workes on either one. This isn"t exactly what I have read here. Is it just as good to put a regulator on a mag. machine? Where would the fourth wire go? Thanks for your thoughts.
Billy

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bnowen

08-30-2007 14:59:15




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 Re: cutout vs. relay in reply to bnowen, 08-28-2007 21:02:28  
Thanks guys. It has always had a cutout on top of the 6v generator. Those thigns seem hard to find those. The other tractors use just a small one instead of the IH version. Thakns for your imput.
Billy



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John T

08-29-2007 06:23:03




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 Re: cutout vs. relay in reply to bnowen, 08-28-2007 21:02:28  
You first gotta understand the difference in a 2 wire Cutout Relay (most used the older 3 brush adjustable genny) versus a 3 or 4 terminal full fledged Voltage Regulator and go one way or the other. If you use a 2 wire Cutout Relay (BAT and GEN/ARM terminals) the gennys Field post wires up to a correct LHBD light switch where it gets either a dead ground for High Charge or a resistive ground (on back of switch) for Low Charge.

The Cutout relay wires: BAT terminal to Load (NOT battery/Starter) side of ammeter. GEN/ARM terminal to ARM post on genny. Gennys Field post wires up to a correct LHBD light switch.

A 4 terminal (LOAD BAT FLD ARM) VR wires:

BAT to load side of ammeter FLD to gennys Fld post ARM to gennys ARM post LOAD feeds hot battery voltage up to loads like lights or ignition (if a coil ignition) often via a connection to their switches BAT input terminal

A 3 terminal (BAT ARM FLD) VR wires:

BAT to load side of ammeter FLD to gennys Fld post ARM to gennys ARM post and loads get their voltage off the load side of the ammeter (same post that wires to BAT down on the VR)

Make sure the belt is good n tight and POLARIZE the Genny BEFORE you fire her up n see what happens????? ????? ?????

Which (VR or Cutout Relay) do you have now??? What light switch do you have now???

EITHER a Cutout Relay (provided the right LHBD switch) or a VR will work and if you have a true magneto (NOT one modified as a coil ignition) it has nuttin to do with the charging system and the Mag dont get wired to none of the charging stuff, perhaps a ground out kill switch somewhere.

Nowwwww ww once you get it wired up correctly with a Cutout Relay orrrrr a Voltage Regulator and its polarized but still dont charge, if you still need my Complete Troubleshooting Procedure for non charging and how to tell if its a genny or a VR/Relay problem, post back n let me know

John T

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John M

08-29-2007 03:33:07




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 Re: cutout vs. relay in reply to bnowen, 08-28-2007 21:02:28  
As Johnny said, the charging system has nothing to do with the mag. and a regulator will work just fine, use one of Bobs diagrams below, just fiqure out which one is the closest to what you have on your C, then work from there. Unless your wiring is in good shape, I would replace it while I was there. Whcih light switch do you have? There will be a difference in the wiring there but it can be used like it is.Forget ebay on the regualtor, go to your local NAPA and pick one up.

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jonnny2006

08-28-2007 22:35:47




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 Re: cutout vs. relay in reply to bnowen, 08-28-2007 21:02:28  
WOW..... ..The mag has nothing to do with a tractors charging system..... All you can put on a mag is a one wire switch that grounds out the mag to kill the tractor. I like to have a kill switch on every tractor regardless of mag or dist because my kids know they can stop everything by pushing in the "kill" switch. As far as your C is concerned If you have a gene on it and not an altanator it might need to be re-polarized. I like the 6 volt gene's better then using a 12 v system with alt. I don't have mine hooked up to the "h" and "l" switch that also controls the lights. instead it uses a voltage reg witch maintains the batery for me. Back when these ol girls were new you could "cook" a battery by keeping it on the "h" setting as the operator was responsible for keeping the battery at proper levels.

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