I agree with some light sanding, it could be very little making it stick.
Another thing to try is the sequence of tightening the dome screws. Set the
dome on with the screws snug so that the piston goes smoothly up and down and
gives that click. Slowly tighten each screw while working the piston until
tight or until it sticks instead of clicks. If it sticks turn the dome to the
next position e.g. Clockwise and repeat the process of tightening the dome
screws. Keep moving the dome around ( make a mark to keep track of where you
are). This may take many iterations, combinations, and permutations, but it's
worth a try. I've made it work on some sticky SUs on a friends carbs at VTR.
Bud
Sent from my Commodore 64
> On Sep 18, 2018, at 1:07 PM, James Henningsen <trguy75@gmail.com> wrote:
>
> Thanks. I think my issue is the piston shaft and the tightness in the inner
> dome shaft. Iâ??ll try some polishing of the piston shaft to see if that
> loosens it up just slightly so it falls correctly. Jim
>
> Sent from my iPhone
>
>> On Sep 18, 2018, at 2:52 PM, Anthony Rhodes <spamiam@comcast.net> wrote:
>>
>> I had the same problem. I polished the outer surface of the piston and the
>> inner surface of the dome with polishing compound. I spent extra time on
>> the areas which were burnished by contact with each other. It didn't take
>> much removal of the surface. Pretty much only needed removal of surface
>> oxidation.
>>
>> -Tony
>>
>>
>> Sent from my 1837 Babbage Analytical Engine
>>
>>> On Sep 18, 2018, at 2:00 PM, triumphs-request@autox.team.net wrote:
>>>
>>> Message: 2
>>> Date: Mon, 17 Sep 2018 12:49:30 -0700
>>> From: "Kinderlehrer" <kinderlehrer@comcast.net>
>>> To: "'Jim Henningsen'" <trguy75@gmail.com>, "'Triumphs'"
>>> <triumphs@autox.team.net>
>>> Subject: Re: [TR] SU H6 Carb Part Need
>>> Message-ID: <008301d44ebf$8d50a660$a7f1f320$@net>
>>> Content-Type: text/plain; charset="us-ascii"
>>>
>>> Did you try switching the domes and see if the problem follows the dome or
>>> the piston?
>>> Bob
>>>
>>> -----Original Message-----
>>> From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of Jim
>>> Henningsen
>>> Sent: Sunday, September 16, 2018 5:25 PM
>>> To: 'Triumphs'
>>> Subject: [TR] SU H6 Carb Part Need
>>>
>>> Anyone have a spare SU H6 piston dome? Carbs on my 61 TR3A. I believe I may
>>> need another as the tolerance is too tight to get the piston to move up and
>>> down easily and get the audible click. If you have one, please contact me
>>> directly.
>>> Thanks,
>>> Jim Henningsen
> ** triumphs@autox.team.net **
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