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Meiang
Samba Member
Joined: September 27, 2016
Posts: 656
Location: Perth, Western Australia
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 Posted: Sun Jul 21, 2019 5:50 pm Post subject: Throttle Shaft Clearance With Carburettor Body |
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| Can anybody tell me what the standard throttle shaft clearance is of a standard Solex 28 PICT carburettor. I would like to measure the deflection on a Solex 28 PICT to see whether it is within specification. |
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kreemoweet
Samba Member
Joined: March 13, 2008
Posts: 3897
Location: Seattle, WA
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| Posted: Sun Jul 21, 2019 6:02 pm Post subject: Re: Throttle Shaft Clearance With Carburettor Body |
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There is no such specification, that has been publicly disclosed.
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26307
Location: Douglas, WY
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| Posted: Sun Jul 21, 2019 8:15 pm Post subject: Re: Throttle Shaft Clearance With Carburettor Body |
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Yeah, I've never seen a spec on this, I'm thinking it's because VW never issued instructions on fixing it. Fixes were all done in the aftermarket.
I've always just grabbed the throttle arm and tried to rock the throttle shaft back and forth, both at idle and mid-throttle, as the play can vary a little between the two.
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Andy T.
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Meiang
Samba Member
Joined: September 27, 2016
Posts: 656
Location: Perth, Western Australia
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| Posted: Sun Jul 21, 2019 9:22 pm Post subject: Re: Throttle Shaft Clearance With Carburettor Body |
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The reason I ask is because I have two NOS Solex 28 PICT carburettors which I believe have excessive throttle shaft clearances (just by feel). Other Solex 28 and Solex 30 carburettors seem to have much tigher tolerances.
I don't believe these carburettors would have been machined incorrectly by the manufacturer.
The modification state numbers are:
721 1779
722 2985
What is unusual about these carburettors is the old tags which were attached to them. They are made of cardboard covered metal with writing in German (I think).
I believe it translates to:
Meister - master
fette seite - fat side
magre seite - lean side |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26307
Location: Douglas, WY
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| Posted: Sun Jul 21, 2019 9:48 pm Post subject: Re: Throttle Shaft Clearance With Carburettor Body |
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Modification State Numbers start with VW. 28PICT don't have them, that didn't start until 28PICT-1, I think you are seeing some form of serial number.
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Andy T.
IMAGE NOTE: It has been noted that Chrome based browsers may have issues in displaying my vast image library, which use non-secure links and are on an FTP server. Images should still be viewable if the link is clicked though.
I do not know how to fix this. All I can say is it all works fine for me with what I use, Firefox. |
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