[AT] IH B275 Diesel

Tue Dec 12 18:12:27 PST 2006

If you look at the on line parts list the wire between plug 2 and 3 is 
described as a coil and has a different part number. I wonder if there 
is a error in the description or if that is not a standard wire. Maybe a 
resistor?

Dean VP wrote:

>To add to my comments I sent earlier which haven't come back to me yet, 0.9V
>and 36 Watts per glow plug defines the current at 40 Amps. That implies a
>glow plug resistance of 0.0225 ohms or 0.09 ohms for the 4 glow plugs total
>in series.  That doesn't really make sense to me yet and would be really
>hard to measure with a common VOM. But if that is right then the coil
>resistance (ballast) would have to be 0.21 ohms or close to it for
>everything to come out right at 12V nominal. But actual measurement might
>help to clarify this. 
>
>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 charlie hill
>Sent: Tuesday, December 12, 2006 2:45 PM
>To: Antique tractor email discussion group
>Subject: Fw: [AT] IH B275 Diesel
>
>
>  
>
>>Here you go Dean.
>>
>>Charlie
>>
>>I'd like to add one comment to this well worn thread.  Not that I know
>>anything about these particular glow plugs but I did try to research them
>>online and this is what I found.
>>
>>
>>    
>>
>http://www.glowplugs.com/results_cross.asp?pid=AG+28&x=37&y=14&seenCrossWarn
>ing=1
>  
>
>>It says that Champion does not have that glow plug any longer and it has
>>been replaced by CH28 which it describes as follows.
>>18mm installation thread with exposed heating element - hairpin, 13/16"
>>reach, M18x1.50 thread size, 0.9V 36W electrical rating
>>
>>Charlie
>>
>>----- Original Message ----- 
>>From: "Dean VP" <deanvp at att.net>
>>To: "'Antique tractor email discussion group'" 
>><at at lists.antique-tractor.com>
>>Sent: Tuesday, December 12, 2006 3:08 PM
>>Subject: RE: [AT] IH B275 Diesel
>>
>>
>>    
>>
>>>Charlie:
>>>
>>>That one didn't make it to me. Could you repost it?  Thanks.
>>>
>>>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 charlie hill
>>>Sent: Tuesday, December 12, 2006 6:45 AM
>>>To: Antique tractor email discussion group
>>>Subject: Re: [AT] IH B275 Diesel
>>>
>>>Dean,  I posted a web link the other  day that shows the replacement glow
>>>plug.  It was rated at .9V
>>>
>>>Charlie
>>>----- Original Message ----- 
>>>From: "Dean VP" <deanvp at att.net>
>>>To: "'Antique tractor email discussion group'"
>>><at at lists.antique-tractor.com>
>>>Sent: Tuesday, December 12, 2006 8:56 AM
>>>Subject: RE: [AT] IH B275 Diesel
>>>
>>>
>>>      
>>>
>>>>Ron:
>>>>
>>>>We have made two assumptions here. Assumption one is that these glow 
>>>>plugs
>>>>are supposed to be wired in series. And the second is that they are 
>>>>rated
>>>>at
>>>>0.9V. If either one of these assumptions is incorrect then we are 
>>>>fencing
>>>>with windmills and all that follows here will be incorrect.
>>>>
>>>>I just looked up some typical resistance on glow plugs and the ones I
>>>>looked
>>>>at were 1.5 ohm at 12v or around 100 watts. To develop 100 watts at 0.9 
>>>>V
>>>>we
>>>>would have to have 110 amps of current. So something doesn't compute. 
>>>>What
>>>>is the part number of the replacement glow plug and what is it's wattage
>>>>and/or voltage rating?
>>>>
>>>>The reason the glow plugs are burning up is probably the coil (ballast
>>>>resistor between the 12V source and the first of the in series glow 
>>>>plugs)
>>>>resistance is not appropriate for the system and too much current is
>>>>flowing. For example if that coil is shorted out the lowest wattage 
>>>>rated
>>>>glow plug will blow out immediately. Which sounds like what is 
>>>>happening.
>>>>the coil resistance should be at least 10 times the resistance of the
>>>>individual glow plug resistance if the 0.9V rating has any merit which I
>>>>am
>>>>beginning to doubt quite seriously.
>>>>
>>>>
>>>>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
>>>>rdhaskell at juno.com
>>>>Sent: Monday, December 11, 2006 11:11 PM
>>>>To: at at lists.antique-tractor.com
>>>>Subject: Re: [AT] IH B275 Diesel
>>>>
>>>>This crazy tractor is giving me fits.  I bought one new glow plug and
>>>>compared the resistance to my plugs and found I had two bad glow plugs.
>>>>I also bought an new resistor/indicator.  Wired it according to the
>>>>diagram.  Tested it and the indicator did not show anything, checked the
>>>>voltage along the line and found number two glow plug (a new one) had
>>>>melted. Checked the wiring and everything was according to the diagram.
>>>>Bought another glow plug and tried it again with the same results, 
>>>>number
>>>>two melted.  This system sucks, the voltages can only be checked when
>>>>energized but the glow plug only lasts a coupe of seconds.  Who would
>>>>know if there are 12v glow plugs that will fit directly in the head?  I
>>>>am even considering drilling these out to fit another design glow plug.
>>>>Any advise?
>>>>
>>>>Ron Haskell
>>>>rdhaskell at juno.com
>>>>Riverside, California
>>>>USA
>>>>http://albums.photo.epson.com/j/AlbumList?u=3009370&f=0
>>>>_______________________________________________
>>>>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
>>>>        
>>>>
>>>_______________________________________________
>>>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
>>>      
>>>
>
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