[AT] Tractor Question - 420 JD

[Dean Van Peursem]

Paul,

Roberts has the best reputation in the JD collecting community.  There are
others who nationally advertise in JD magazines but do not have nearly as good a
reputation for handling troublesome carburetors. There are some passages that
cannot be opened just by boiling or by blowing with high pressure air.  But the
key is, Roberts tests the carburetor on an actual engine for proper operation
before it is returned. Most if not all of the others do not have that
capability. It is known in the JD collecting community that Roberts should be
the first choice and is also well known for being the last choice because they
get fixed there. I have no connection to the company at all but have had one
very troubling duplex carburetor fixed there and have visited the facility
twice. A very professional operation and also a good place to get gaskets and
parts. Their gaskets are softer and thicker that others and work better on old,
warped, rusted and less than perfect surfaces. Much better than what JD or
aftermarket suppliers currently sell. Be prepared for a long wait if you send it
off to them for repair. They usually have a large backlog, especially in the
winter. But there really isn't any other place that will truly find the problem,
if it is the carburetor. 

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Paul Waugh
Sent: Thursday, August 07, 2008 7:32 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Tractor Question - 420 JD

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

Paul in IN
----- Original Message ----- 
From: "Dean Van Peursem" <deanvp at att.net>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Thursday, August 07, 2008 8:30 PM
Subject: Re: [AT] Tractor Question - 420 JD


> Paul,
>
> It sounds like one of the carburetors internal passages is still blocked. 
> Looks
> like it has the correct carburetor on it. See info below.  I would 
> recommend the
> following place to get your carburetor properly cleaned out. Roberts 
> Carburetor
> Repair in Spencer, IA.  They live test the carburetor on a running engine 
> after
> they work on it to make sure it is right.
>
> https://robertscarbrepair.com/Default.asp
>
> JD 420  Carburetor info
>
> Ser # Range; Carburetor #; Fuel type
>
> 80001 - 113755; Marvel-Schebler TSX-641; Gasoline
> 113756 and up; Marvel-Schebler TSX-688; Gasoline
> 80001 and up; Marvel-Schebler TSX-678; Gasoline
> 80001 and up; Marvel-Schebler TSX-689; Replaces TSX-678
> 125001 and up; Marvel-Schebler TSG-80.5; LP-Gas
>
>
> Dean Van Peursem
> Snohomish, WA
>
> If we take the time to count our blessings we don't have time to complain.
>
>
>
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Paul Waugh
> Sent: Thursday, August 07, 2008 4:25 PM
> To: Tractor
> Subject: [AT] Tractor Question - 420 JD
>
> Hi All
>
> I have a 1956 'Green' JD 420.  I have always had to run the choke out 
> quite a
> ways. I have rebuilt it, had it rebuilt and still same thing. I have it 
> off
> right now from dirt while bush hogging tall grass, and I wonder if it even 
> has
> the correct carburetor on it.  The brass tag reads TSX 641, second line 
> 256.  If
> this tells any one or they can guide me to a website.
>
> TX Paul in IN
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