[AT] Zenith Stuck Jet Removal

[charlie hill]

Steve,  that's a good plan!  Also, bees wax works great if applied to hot 
items.  It melts and seems into the threads.  I guess it was the original 
penetrating oil.

Charlie

-----Original Message----- 
From: Steve W.
Sent: Friday, July 27, 2012 12:11 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Zenith Stuck Jet Removal

Ben Wagner wrote:
> Hello,
>
> I am in the process of rebuilding a Zenith carburetor on a Gravely L; I
> know this is a tractor group, but we do have Zeniths on tractors!  This
> Zenith is nearly identical to the ones on my Farmall A's.  Someone along
> the way attempted (vainly) to remove the brass
>
> ~main jet
> ~main jet passage plug
> ~well vent jet
> ~idle jet
>
> and did a terrible job of using a screwdriver.  The notches are
> stripped!  Furthermore, whoever installed them either torqued the jets
> or applied a sealant.  I had enough left to get my screwdriver in place,
> but even after days of soaking in penetrating fluid, the parts will
> still not budge.  My screwdriver doesn't have enough power, even clamped
> in a vise with all my weight on the turn.  I don't want to damage the
> aluminum bowl, or the threads, so I need a way to extract these stubborn
> parts.
>
> I was able to remove the needle seat with my screw extractors since the
> notches were stripped on it also.  However, the little jets are either
> too shallow for my extractors to get enough grip into the brass, or they
> are too small for any jet.
>
> Has anyone encountered a similar issue?  How did you get these stubborn
> characters out?
>
> Thanks for your help,
> Ben Wagner
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> http://www.antique-tractor.com/mailman/listinfo/at
>

Heat. Grab a soldering iron or gun and apply heat to the jet. Let it get
good and hot. Now spray with some lube. Use a punch and tap the jet
straight a few times. This combo should break it loose enough to allow a
left hand drill bit to grab it and remove it.

-- 
Steve W.
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