Re: TN-28 carb overhaul

[legendre]

Heya obnut,

quote obnut:

I am overhauling the carb on my tn-28. I can’t get the brass washers and leather seals out of the primer pump. I have used the suggestion made by David Poche in his fine article on servicing tn-28 carbs. The carb was quite dirty, I have used carb cleaner, alcohol, acetone, and simple green. Also tried heat and they will not budge. Does anyone have any suggestions.

Those thin-wall brass tubes used in the carb’s primer seal stack can be a serious beotch. I have two TD20 carbs here, and I’ve only managed to pluck the primer goods from one of them. The other, that tube just won’t move.

Heat +may+ temporarily tighten the brass part in the zinc / pot metal carb body, but that’s no problem once things are cool. Either way, you can take advantage of the differential expansion, as it might break-away some corrosion that’s gluing the parts together. But of course, wait ’till the carb is cool before you try to extract the brass item.