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Allis Chalmers Discussion Forum

draining battery?

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02-14-2008 14:10:07

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I hope you dont mind me picking at the brain But I just fired up my ACib 4cyl gas 6 volt system. i have a new battery and everytime I go to start it the battery is dead. Well I noticed a one time click noise, sounds like its coming from the Delco generator whenever you remove and reconnect battery cables. Is that common. My shut off switch is working fine It makes click noise wheather on or off, any ideas?

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John T

02-15-2008 08:56:51

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:10:07  
AC, Okay, heres the real deal......

If you turn the tractor off and the battery becomes discharged pretty rapid, the Cutout Relay (regardless if in a 2 wire relay or a full fledged Voltage Regulator) may be stuck closed.

Iffffff thats the case:

1) A working ammeter would swing over to a heavy - discharge.......

2) The battery will discharge in a fairly short time

3) The generator can get hot

More ways to tell if its sticking:::

1) If you remove the belt (just temporarily short term) and then when you turn the tractor off if the relay is stuck THE GENNY WILL SPIN LIKE A MOTOR......

2) If (tractor turned off) when you disconenct the wire to BAT (on a VR or Cutout Relay) a working ammeter would stop showing discharge and/or the genny stops turning...... Be carefult that wire to BAT is hotttt so dont let it short to the tractor

How its supposed to work in a 2 wire cutout relay or a Voltage Regulator is the wire to the BAT terminal (hot voltage) is hot and the relay is normally OPEN, then when you start the tractor and the gennys voltage raises, the relay lacthes closed so the gennys output can become connected to the battery (via the closed relay and an ammeter if so equipped) n charge it butttttttttttt when you shut down the relay opens (unless its sticking closed) to prevent battery discharge and so the gennys isnt seeing voltage n trying to run like a DC motor (which it is)

NOTE: If the relay isnt sticking yet the battery still discharges Probably over a much longer time,,,,,,,,,there may be another short or problem.

Any questions please post back, hope this helps

John T

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02-14-2008 16:32:38

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:10:07  
Sorry old I agree with Joe

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02-14-2008 14:12:32

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:10:07  
Sounds like you have a sticking relay in the V.R. which will drain the battery and also cause that click

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02-14-2008 14:24:20

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 Re: draining battery? in reply to old, 02-14-2008 14:12:32  
Well I must say you got me on what a V.R. is. Is that a easy fix? Im a wantabe weekend farmer who mostly farms Goverment chickens. But I still like play on my AC. Seems like everytime I take it to shop for something it cost $250.00 Im looking to save a buck on this fix, any help would be greatly appreciated.

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El Toro

02-14-2008 14:34:55

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:24:20  
He means your voltage regulator is the problem.
Look for a small rectangle black box on or near the generator with your wires from the generator connected to it. If you find I would replace it.

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02-14-2008 14:46:28

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 Re: draining battery? in reply to El Toro, 02-14-2008 14:34:55  
Thanks for info as soon as he said voltage regulator it clicked. I couldnt get the abbreveation, I had V.R. as in Vent Rib stuck in my mind. Thanks again folks Im sure thats it.

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02-14-2008 14:28:30

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:24:20  
V.R.= Voltage regulator. Most sit on the generator but some are mount in other places. Some times the point on them can be cleaned but most of the time your better off replaceing the V.R. becuase if you clean the points they will probably stick again soon after, a new one is around $30-40

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R Aiken

02-14-2008 16:04:30

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 Re: draining battery? in reply to old, 02-14-2008 14:28:30  
Old. should not have a voltage regulator. AC's have a cutout on a delco 3 brush generator

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02-14-2008 19:24:25

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 Re: draining battery? in reply to R Aiken, 02-14-2008 16:04:30  
V.R. or cut out either on does the same thing for the most part and will both cause the same problem if there no right. Just a different term but either way most likely his problem

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02-14-2008 14:34:28

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 Re: draining battery? in reply to old, 02-14-2008 14:28:30  
Got it, makes sense. Thanks a bunch!

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Joe M(GA)

02-14-2008 16:16:44

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 Re: draining battery? in reply to ACfan, 02-14-2008 14:34:28  
third party image

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