[AT] IH B275 Diesel

[charlie hill]

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
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