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machinemd

Jedi Hopeful
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Hey Guys,

Again I have to pick on the wisdom of the experienced minds. I just rebuilt one carb using Nelson Reidels instructions. I'd be lost without them! It's a darn shame they're no longer available! Something he wrote makes no sense to me....actually it strikes me as totally wrong. What's everybody think? The following is a shortened version of his instructions.

Replacing Throttle Shaft (Spindle) Seals

The throttle shaft seals prevent air from leaking into the intake manifold. Small leaks around the throttle shaft are of no consequence when the throttle is at least partially open. However, the leaks can cause a rough idle. It is doubtful that the seals wear out because the typical Triumph gets very little use, especially here in the mid west. However, the seals are subject to deterioration due to age. If the seals have not been changed for 10 or 15 years it's probably a good idea to do so when the carb is off.


The new seals are inserted with fingers, flat side out and positioned as necessary with a blunt screwdriver


As written, the cupped side faces in basically preventing stuff from getting out, not in. I have to believe he's correct but it seems to go against all the rules. Unfortunately my old seals were hard and just came out in pieces so I had nothing to compare to. What do you think?

Thanks, Steve
 
Hi Steve,
I would expect the cup side to expand against the shaft with pressure on it. In this case, air trying to get into the carb. So in theory, I agree with you. Maybe the info contains a misprint?
D
 
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