[AT] Allis Chalmers ED40 injector pipes

[John Maddock]

James

This email from my friend will provide some of that info:


"Evening John
Not sure of the protocols here about replying to James Peck's query about
fitting glow plugs to 23c engines, so I'll reply to you.
Otmoor Ironworks in the UK do the conversion. Richard Dixon,
otmoorironworks at gmail.com .  They drill and tap the head and supply a set
of glow plugs for about 100 pounds.
Some of the MF 35s with the 23c engines had glow plugs fitted from new, as
did all the industrial versions. I believe they were fitted with 14mm
thread plugs wired in series, with a resistor box somewhere under the dash.
If one plug died the lot stopped working. The 14mm plugs are getting hard
to find; Land Rover ones fit if you can find and afford them.  I opted for
drilling M10x1 for 12v plugs wired in parellel; you don't need the resistor
but you do need a reasonably hefty solenoid. Wired in parallel, if one
fails it should still start on 3.
There is a vast amount written about these engines, it seems the gist of it
all is you have to get the timing spot on, and compression is vital. If the
valves and seats have been re-cut a couple of times the valves are recessed
 enough to lower the compression just enough to create problems. There is a
school of thought that says the little hole in the combustion chamber
leading to the Ricardo swirl chamber should be enlarged to about the size
of a pea to allow the compression and combustion gasses easier access into
and out of the chamber, and easier cranking. Care must be taken not to
enlarge the hole so that it overlaps the gasket area.
I know that since a recent rebuild my tractor starts a lot easier, on a
reasonably warm day (20deg. C) without glow plugs. I was super careful
(lucky) with timing. As the new timing chain and tensioner wear in this
might slowly get out of sync. again, but at the moment it's fine.
The only downside with fitting the glow plugs is that I had to bend the
injector lines to clear the plugs. Now several leak at the connections.
When I look at photos of similarly equipped 23c's the plugs must be
shorter, because they fit below the injector lines. The 10mm plugs must be
a little longer; the terminals  would have shorted out on the lines, hence
the search for ED 40 ones-but maybe they were the same as the standard 23c
ones.   Maybe I'd better try to fix the ones I have.
Hope that is of some use.
Cheers
Guy "


> What contemporary book?
>
> What manufacturer pioneered the use of glow plugs?
>
> Thomas Martin AT List Member (tmartin at xtra.co.nz); Well, I'm wrong! :-( It
> may look like a Ricardo Comet type cylinder head, but according to a
> contemporary book on the subject, the pre-combustion chamber or air-cell
> is of the Freeman-Sanders type... So I don't know about the Ricardo
> soubriquet, sorry.
>
> Ricardo refers to the cylinder head design which utilised the Ricardo
> Comet indirect injection: The injector at 90º to the bore injecting into
> a pre-combustion chamber. Buda engines in the early 50s used it, it was a
> setup that was prone  to head cracking, AC when they bought Buda in the
> middle fifties redesigned to direct injection. Improved starting out of
> sight.
>
> https://www.allischalmers.com/forum/search_results_posts.asp?SearchID=20200201205126&KW=ed40
> This calls the engine a Standard Ricardo.
>
>   https://www.tractor.info/en/tractors/farm/allis-chalmers/allis-chalmers-ed40
>
>   https://www.gracesguide.co.uk/Allis-Chalmers_Co
>
>   Bo Hinch AT List Member (bohinch at gmail.com); For parts , call these
> People
> https://www.yesterdaystractors.com/Allis-Chalmers-ED40-Tractor-Parts.html
>
>   AÂ  story on the tractor
>   https://www.yesterdaystractors.com/articles/artint155.htm
>
>  John (JV) Maddock  Down Under AT List member
> (agtronixjv at southcom.com.au); Can anyone suggest where a new set of
> injector pipes might be obtained for said tractor? That tractor used the
> UK-built Standard 23C engine, with a modified head fitted with glow
> plugs. I have a friend who has modified his FE35 by the addition of glow
> plugs, but now the original pipes don't fit well, and leak.
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Be a good ancestor