[AT] 430V update

Sun Nov 19 06:28:41 PST 2017

I thought that two cylinder Deere's were always out of time...  :-)
While you have the manifold off, stick that bore-scope inside of it and
look for anything "funny".
Back when my father bought his Ferguson TO-20 new it had a consistent and
annoying running problem and it about drove the dealer nuts. They tuned,
re-tuned and went over and over it. Tore it down to re-set the valve-lash
Then they started replacing parts. New manifold gasket, new carb, new dist
cap, new wires, new distributor,, changed out the fuel valve/sediment bowl.
Nothing they did helped it... Finally my father suggested that they replace
the manifold. The dealer's shop foreman said he didn't see how that could
make any difference but my father said "You have replaced about everything
else". So they put a new manifold on it and everybody lived happily ever
after...
The dealer had been in contact with the factory through much of the problem
and they asked the dealer to send the old one back to them. They band-sawed
it in half and in an area that you couldn't see they found a casting flaw
(described as a "glob" of iron) that was partially obstructing the flow to
one end cylinder. I don't remember now if it was the front or back but I
don't guess it matters.  :-)

.

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On Sat, Nov 18, 2017 at 9:42 PM, Spencer Yost <yostsw at atis.net> wrote:

> You're probably right Farmer, as the hunt is not that bad and  can use the
> tractor. But it does prevent me from setting the idle and timing the
> engine. I have statically timed the engine, but I am unable to do a running
> timing. That's only reason I want to fix it.
>
> On another note:  I used the bore scope  to peek around the carburetor to
> find the tag. I do have a TSX 688, which is the right carburetor for the
> tractor as Dean pointed out
>
> I could not figure out where I got "541" from.  I have a couple of
> carburetors sitting around, so I guessed that's where I got it from.  But
> interestingly, I grabbed the two carburetors I have and neither one of them
> are TSX 541.   Then it occurred to me. The Pacer has a 541 carburetor and I
> was rebuilding it about the same time I was unsticking the 430. Geez, I
> hate getting old.
>
> I picked up the manifold and carburetor gasket and hopefully will have
> time tomorrow to install them if the manifold doesn't need machining.
>
> Spencer Yost
>
> > On Nov 18, 2017, at 1:03 PM, Indiana Robinson <robinson46176 at gmail.com>
> wrote:
> >
> > Give it a shotgun, point towards the woods and let it hunt...  ;-)
> >
> >
> > .
> >
> >
> >> On Nov 18, 2017 11:30 AM, "Spencer Yost" <yostsw at atis.net> wrote:
> >>
> >> Thanks guys,
> >>
> >> One of the blessings (or so I thought) was the carburetor was very
> clearly
> >> recently rebuilt. The throttle shaft is just as snug as one could hope
> for.
> >> I definitely don't have a vacuum leak through the throttle shaft. The
> >> linkage all seems correct and tight as well.   What made me wonder about
> >> the right carburetor, was the idle speed adjustment screw barely
> touches.
> >> You have to screw it almost all the way in to get it to even start
> >> adjusting. That's why I even looked it up to begin with and that's the
> only
> >> part that never seemed other than perfect.
> >>
> >> The carburetor number is based on memory. I haven't looked at the tag
> >> since I had the carburetor off while trying to unstick the engine. So
> I'm
> >> going to have to look at it again to confirm it's at 541. But I'm nearly
> >> certain it is.
> >>
> >> PS: the manifold bolts are already loose. I didn't bother ordering the
> >> manifold gasket until I was certain I could get the bolts off.  Like you
> >> Dean, my experience is spotty with positive outcomes in this regard.
> >>
> >> Spencer Yost
> >>
> >>
> >>
> >> Spencer Yost
> >>> On Nov 18, 2017, at 10:11 AM, Dean VP <deanvp at att.net> wrote:
> >>>
> >>> Spencer,
> >>> One of the more important things I have learned way to late in messing
> >> with these old tractors is to not try to remove manifolds unless I
> >> absolutely have to. I don't like drilling out broken off manifold bolts
> and
> >> that is almost guaranteed on 50 plus year old tractors. I agree with
> Steve
> >> that your idling issues are more than likely worn carburetor shaft
> issues
> >> OR incorrectly adjusted linkage. Since you needed to mess with the
> throttle
> >> you might start with that adjustment. I've had more idling problems
> caused
> >> by linkage issues that I want to talk about because I never check that
> >> first.  Spray a little WD40, using the straw, at the shaft entrances to
> the
> >> carburetor body. Changing a carburetor shaft is no big deal. I don't
> >> remember if the 430 has bushings for the shaft or not. I doubt it.  The
> >> shaft is just probably made of a softer material.  The carburetor for
> the
> >> 430V should be a TSX 688. JD had a series of carburetors for the 420
> from
> >> TSX 641 to 678 to 688 to 689 but the !
> >> 430 Gas S/B TSX 688. The AF 430 would be a 678 or 689
> >>>
> >>>    From: Spencer Yost <yostsw at atis.net>
> >>> To: at at lists.antique-tractor.com
> >>> Sent: Friday, November 17, 2017 9:47 PM
> >>> Subject: [AT] 430V update
> >>>
> >>> I tried several things to find the vacuum leak, and the problem is
> >> either not a vacuum leak, or is just so insidious that propane and WD-40
> >> just simply isn't going to find it. Considering manifold gaskets are
> super
> >> easy to replace and cheap, I just ordered a replacement gasket(carb and
> >> manifold) from John Deere(price was competitive).  At least I can rule
> out
> >> the gaskets after I deck/file the manifold and replace the gaskets.
> >>>
> >>> I am beginning to suspect the Carb. I didn't have a hunt at idle for
> the
> >> first little bit that I ran the engine. But the throttle also wasn't
> >> working so I never got a true idle so I assumed the hunt was real and
> the
> >> lack of throttle control hid it.  Plus I am not getting the response
> from
> >> adjustments that I would expect.
> >>>
> >>> Also, I am pretty sure the carburetor is a MS TSX 541. The parts
> catalog
> >> indicates  I should have a 641. I need to pull the carb  when I do the
> >> manifold and double check the number. (Of course the tag is facing the
> >> engine so I can't see it).  Does anyone know if the 641s were a definite
> >> for this tractor? The 541s were common on Ford's, so I'm afraid the
> carb is
> >> been replaced sometime in the past. If that's the case that might
> explain
> >> my hunt.
> >>>
> >>> I got the serial number research from the two cylinder club today.
> >> Here's a picture of the document they sent me. The tractor survives as
> it
> >> was shipped a except the "dry charge" battery of course (-:  Everything
> >> mentioned is still the same and the tail light even still works(did
> have to
> >> clean up the ground).
> >>>
> >>> An interesting sidenote: the finish date is my wife's birthday(it is a
> >> few years older). I thought that would earn a few points for the
> tractor,
> >> but I don't think it did :-)
> >>>
> >>>
> >>>
> >>>
> >>> Spencer Yost_______________________________________________
> >>> AT mailing list
> >>> http://www.antique-tractor.com/mailman/listinfo/at
> >>>
> >>>
> >>>
> >>> _______________________________________________
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> >>
> >>
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-- 
-- 

Francis Robinson
aka "farmer"
Central Indiana USA
robinson46176 at gmail.com