[AT] Tractor Question - 420 JD

Paul Waugh pwaugh at embarqmail.com
Fri Aug 8 11:42:50 PDT 2008


I just got back from trying my "cleaning' ... no different, run 3-4 sec then 
quit.  I had heard of the WD-40 method, but I will try the LP gas method ... 
as soon as I get it drug up from the bottom of a hill to up under a shade 
tree, and can charge battery or jump battery hahaha

Thanks a bunch for ideas and help

Paul in IN
----- Original Message ----- 
From: "Mike Sloane" <mikesloane at verizon.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Friday, August 08, 2008 6:54 AM
Subject: Re: [AT] Tractor Question - 420 JD


> Instead of WD-40, these days I use an unlit propane torch with the valve
> cracked open. That way you can direct the propane right at the various
> points around the manifold and the carburetor. In addition to warping,
> look for pinholes in the casting and gaskets that aren't sealed
> completely. You need to cover the entire area of the intake from the
> head to the carburetor, including the throttle shaft itself. A worn
> throttle shaft/bushings will allow air to get past and cause a lean 
> mixture.
>
> Mike
>
> Lew Best wrote:
>> Don't know if it'll still work as I'm told that WD40 has been
>> re-formulated but in the old days you could spray it around the manifold
>> contact places, etc. with an engine running & any vacuum leak would make
>> an engine speed up quite noticeably.  Ether starting fluid should do the
>> same but would have to be kept plenty far from the carb intake to avoid
>> a "false alarm."
>>
>> Lew
>>
>>
>> -----Original Message-----
>>
>> Thanks for the replies.  It is good to know that at least it is the
>> right
>> one.  I have cleaned with carb cleaner and blown out several times over
>> the
>> 15 years I have owned it.. I took it to the place that Dennis Polk uses,
>> and
>> had it boiled and new jets, still same thing.  I had heard of the place
>> in
>> IA and was thinking of trying them.  About a vacuum leak, I did a ring
>> job 2
>> years ago, and used all new gaskets, so it should not be leaking air. I
>> did
>> use the same manifold, so if it is wrapped, then I would have the same
>> problem.
>>
>> I will keep plugging away, thanks again
>>
>>
>>
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