[TR] TR3 carb rebuild H6 DIFF

[Paul Dorsey]

I'm BACK (too)!
But Frank's issue reminds me of a problem that has bothered my H6 carbs. 
Since my car doesn't run (for how many years now?) what I'm gonna say isn't 
actually a fix, but maybe a way I'll live with my "JET/NEEDLE MISALIGNMENT 
PROBLEM".  rEMEMBER: I've never driven a Triumph before, so that's my 
disclaimer, YMMV

But, Both of my carb's pistons drop with a nice click, if and only if, I 
totally unscrew the plastic dashpot caps on the top of the carbs.
However, I've been told that their apt to shoot out these little plungers 
out of their pistons upon accleration or something.  Soo, why not find a 
wire,string, tape (and hose clamp) or something to keep them from shooting 
out too far?  I know i'll proably loose some Marvel Mystified oil or 
something.  And it's not a fix nnor nothin, but, it keeps things from 
binding.  Maybe the little plungers aren't properly centered or the piston 
covers are out of whack, what else could cause this?

I hope Frank happens upon a 'real fix' for his problem. My problem may not 
be fixable.
Thanks, Paul Dorsey  60 TR3


----- Original Message ----- 
From: "Randall" <TR3driver at ca.rr.com>
To: <triumphs at autox.team.net>
Sent: Saturday, October 16, 2010 4:21 PM
Subject: Re: [TR] TR3 carb rebuild H6


>> so what am i doing wrong with the jet assembly that is
>> making the choke so full
>> of friction?
>
> Only thing I can think of is that somehow, one of the jet bearing halves 
> is
> either cocked when it works and forced straight when you tighten the nut, 
> or
> else being forced out of line.  It shouldn't make any difference which way
> that slot is turned (it's just there to allow fuel to flow into the jet
> bearing.
>
> I'll add that I never had very good luck using the centering tool; and 
> feel
> it is a poor design.  It in effect assumes that everything is machined
> perfectly, since it only centers the jet to the carb body rather than to 
> the
> needle itself.  If everything was machined perfectly then there would be 
> no
> need to adjust the jet centering!
>
> My method is to assemble everything with the mixture nut turned full lean
> (or off entirely) and tighten the large nut partway with a wrench, so the
> jet bearings can just barely move.  I then tap the jet bearing around 
> until
> the jet is centered (as shown by the needle not binding, piston falls with 
> a
> click), which is a trial and error process but generally only takes a few
> minutes.  Then finish tightening the big nut and check again; sometimes it
> will move and the process have to be repeated.  When you set the mixture,
> the jet will be lower and hence assure some small clearance to the needle.
>
> BTW, I really like the seals from Moss, but they appear to be just 
> ordinary
> O-rings.  Since I finally managed to wear them out (apparently some fine
> grit got in there and caused the wear), this time I used ordinary Buna-N
> O-rings.  Seem to be working so far.
>
> Randall
>
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