[AT] IH B275 Diesel

Thu Dec 7 16:08:39 PST 2006

Yeah Dean,  no doubt I had the .09 and the 0.9 wrong.  I was just commenting 
on how the 560 is we have.
But seems like they made a good up grade from the older 460-560D tractors 
gloplugs. Kinda like chevrolet done in the 70s to their 6 cyl engines,
intrickal (SP) Head 2bbl dual exhaust manifold. Worse thing about it was is 
a bunch of High tech engineeres were trying to make simple, diffucult and 
more expensive. I never seen a problem with the older 6cyl 1bb carb single 
ex manifold engines. And the power is even at best, and most times worse for 
3X the price.
Kevin Mosier
_______-snip-____________________
 (which is dumb, but
> you work with what you got),
> so each one wants only a fraction of a volt.  As the plug says, 0.9 volt.
>
> If you put 12 V on one, it should glow very bright for a fraction of a
> second,
> then won't glow at all any more.
>
> Dave Merchant

----- Original Message ----- 
From: "Dean VP" <deanvp at att.net>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Wednesday, December 06, 2006 10:25 PM
Subject: RE: [AT] IH B275 Diesel


> Kevin:
>
> I would respectfully request that you re-read Brett's initial response on
> this thread. Assuming a serial circuit setup and 12 Volts nominal. It 
> isn't
> 0.09 volts, it is 0.9 volts across each glow plug. Secondly, he carefully
> pointed out that there is a resistance coil between the 12V source, behind
> the dash, that drops the voltage 8.4 volts to at least 3.6V at the first
> glow plug and then each glow plug reduces the voltage serially and 
> equally.
> I suspect the plugs are rated at 0.9 V but operate at slightly less than
> that, but let's say they are supposed to operate at 0.9V to glow properly.
> Without knowing the glow plug resistance, the coil resistance and the
> intended current one can only guess what their respective values might be.
> But lets say it takes 8.1 Watts (V X I = Watts or 0.9V x 9 amps = 8.1 
> Watts)
> to make them glow properly. That implies approximately 9 amp current and
> then each glow plug is 0.1 ohm to have 0.9V developed across it.  And the
> coil would be aproximately 0.94 ohms. The coil under this scenario would
> dissipate approximately 75.6 watts.  Voltage across the 
> resitance/indicator
> coil of 8.4 Volts x 9 amps = 75.6 watts.
>
> So if any glow plug failed all would not work and the indicator would not
> light. Now if one has a high input resistance voltage meter and one or 
> more
> of the glow plugs has burned out and it is now completely open - very high
> resistance, the voltage would read 12 volts at all glow plugs contacts 
> until
> one got to the second leg (the lead to the next plug) it would read 0 V.
> That would tell you that the plug you have the lead on has failed. But a
> better way to check this would be to use the VOM in resistance mode and
> check the resistance of each plug. If any plug reads considerably higher 
> or
> very high compared to the others then it is the failed plug.
>
> PS: All wires should be disconnected for this test. The last plug in the
> chain can have its wire connected to ground and the ohm reading should be
> the same across the plug as it is to ground. If not the grounding wire has
> failed. If all plug contacts read 12 volts then either all have failed or
> the ground wire isn't making a connection. Starting at the grounded plug 
> the
> voltages (referencing ground) should read something like 0.9 V on the 
> first,
> 1.8V on the second, 2.7V on the third and 3.6V on the plug that connects 
> to
> the resistance coil. These may not be the exact numbers but the plugs 
> should
> all develop similar voltage drops. If they are not similar then something 
> is
> wrong.
>
> Hope this helps.
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> "He who makes decisions in haste repents at his leisure."
>
> www.deerelegacy.com
>
> http://members.cox.net/classicweb/email.htm
>
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Kevin
> Sent: Wednesday, December 06, 2006 5:23 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] IH B275 Diesel
>
> Well if they say .09 Volt they aint like what I said. 460-560 IH Diesel, 
> All
>
> I was saying was how mine work.
> If ya put a .09v light bulb on 12 v its going to glow very bright for a
> fraction of a second,
> then won't glow at all any more. Wow wonder who was the brilliant mechanic
> that figgerd thatn out !  If its .09v you need to get the manual. Cause
> there has to be a resistor to get that low voltage.
> What year is this tractor anyways ?
> Dont seem like .09 volts would heat much in the summer.
> Kevin Mosier
>
> ----- Original Message ----- 
> From: "Dave Merchant" <nesys_com at ameritech.net>
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>;
>
> "Antique tractor email discussion group" <at at lists.antique-tractor.com>
> Sent: Wednesday, December 06, 2006 2:56 PM
> Subject: Re: [AT] IH B275 Diesel
>
>
>> It really sounds like these ones are wired in series (which is dumb, but
>> you work with what you got),
>> so each one wants only a fraction of a volt.  As the plug says, 0.9 volt.
>>
>> If you put 12 V on one, it should glow very bright for a fraction of a
>> second,
>> then won't glow at all any more.
>>
>> Dave Merchant
>>
>>
>> At 08:40 AM 12/6/2006, Kevin wrote:
>>>If these are like 460-560D they each need 12 volts, take one out and clip
>>>a jumper on pos terminal.
>>>Touch the gloplug to the tractor, is good to have a cigar ready to light
>>>at this time for if the gloplug is good it will get red hot in seconds. 
>>>If
>
>>>not set it aside and try another. Once you find out which ones are good,
>>>get replacements for the bad. Then rewire the whole thing !
>>>A poor man has poor ways
>>>ironman
>>>Kevin Mosier
>>>----- Original Message ----- From: "Gus" <gibsongus at earthlink.net>
>>>To: "Antique tractor email discussion group"
>>><at at lists.antique-tractor.com>
>>>Sent: Tuesday, December 05, 2006 11:21 PM
>>>Subject: Re: [AT] IH B275 Diesel
>>>
>>>
>>>>John I have a B275 and I had to change some of the glplugs there are two
>>>>circuts in each plug hot to first plug ground to hot next plug and so 
>>>>one
>
>>>>last plg is grounded...
>>>>
>>>>-----Original Message-----
>>>>>From: John Kennedy <ihctractor at hotmail.com>
>>>>>Sent: Dec 5, 2006 11:06 AM
>>>>>To: at at lists.antique-tractor.com
>>>>>Subject: Re: [AT] IH B275 Diesel
>>>>>
>>>>>I think that your plugs are grounded to the engine though the threads 
>>>>>It
>>>>>doesn't make any sence that the would be in series as they would only
>>>>>work
>>>>>if you had 6 of them.  The wires going in and out of the plug are there
>>>>>so
>>>>>that you can use one wire from the switch to light up all of the plugs.
>>>>>
>>>>>The last plug should only have one wire to it, it should not be
>>>>>grounded.
>>>>>That will only ground out your hot wire to the plugs.
>>>>>
>>>>>A freind of mine who was Electrician always said I don't understand how
>>>>>automotives wiring works with on one wire. I told that the frame was 
>>>>>the
>>>>>other wire, he still had a hard time understanding that.
>>>
>>>>AT mailing list
>>>>Remembering Our Friend Cecil Monson 11-4-2005
>>>>http://www.antique-tractor.com/mailman/listinfo/at
>>>
>>>_______________________________________________
>>>AT mailing list
>>>Remembering Our Friend Cecil Monson 11-4-2005
>>>http://www.antique-tractor.com/mailman/listinfo/at
>>
>> Dave Merchant
>> kosh at nesys.com
>> nesys_com at ameritech.net
>>
>> http://www.nesys.com
>> http://www.nesys.org
>>
>>
>> _______________________________________________
>> AT mailing list
>> Remembering Our Friend Cecil Monson 11-4-2005
>> http://www.antique-tractor.com/mailman/listinfo/at
>
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