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Ford 9N, 2N & 8N Discussion Forum
:

the very timy air -hole and discharge on carb

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asjahnke

05-03-2004 01:57:58




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i know some of you have had this problem at one time or another. LEAKS! i had one that was located between the choke valve and the drain cock on the carb on the 9n. it periodically spit gas out. well i usually fix leaks. then i went and bought a copy of an original ford manual. that says do not poke or prod, or remove the felt lining. this port is used to discharge gritty dirt,and excessive moisture from the manifold. why do we always find this out after we try to fix it.all its called is a plug and strainer. about the size of a pencil lead hole from outside.what exactly are we not suppose to remove. is it a ball of felt packing, some mechanic say just use some steel wool to keep it from getting dirt in the carb through the little hole. steel wool rust unless you soak it in oil. and what if it gets sucked into the main part of the carb. i have never heard anything on this before . plz help. if you have not had a leak from this hole before you would not know it exists. thank you for your help in advance my e-mail is docsue52@hotmail.com

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Dell (WA)

05-03-2004 09:19:03




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 Re: the very timy air -hole and discharge on carb in reply to asjahnke, 05-03-2004 01:57:58  
doc..... ....yep, yer right, steelwool rusts, but stainless steelwool or bronzewool doesn't. Available at marine supply stores. Later M/S carbs use a "sinstered" bronze filter. A development of WW2 hydraulic's technology. Sinstered filters were created by squeezing itty-bitty bronze balls under high pressure to form a porous metalic filter that would pass fluid but not dirt contaminates..... ....Dell

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Rob

05-03-2004 05:45:50




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 Re: the very timy air -hole and discharge on carb in reply to asjahnke, 05-03-2004 01:57:58  
That hole is in the air intake. You flooding that engine when you try to start it or what? I think that's why it's there. It's so easy to flood that carb and the gas needs to go somewhere or you have to release the air intake tube to let the gas out. My hole has the brass thingie Zane mentioned and it's hard plugged and I can't get it open. I would if I could.
If everything is working right there isn't anything leaking out that hole but it's good to have if you flood it. Figure out what's wrong. Bad float valve? Flooding at start? What? Fix it, stop it, and forget it I say.

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ZANE

05-03-2004 04:37:05




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 Re: the very timy air -hole and discharge on carb in reply to asjahnke, 05-03-2004 01:57:58  
It is supposed to leak from this filter/hole. That is what is was designed for. To allow excess gasoline to drip from the intake and to prevent engine licquid lock should the gas needle in the carburetor fail to close properly which is a common occourance on any gravity fuel system. Later model Marvel Schribler carburetors have a brass filter in the hole. The filter is made jp of very small brass balls pressed together.

Zane

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abjahnke

05-03-2004 14:03:53




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 Re: Re: the very timy air -hole and discharge on c in reply to ZANE, 05-03-2004 04:37:05  
it all makes sense to me after something has been explained in plain english. its like someone hit me with a brick, i just put a screw with a rubber washer in the hole so it wouldnt leak. and the tractor still runs fine. i was afraid of getting dirt into it while working. i have not had any problems with starting, etc. in fact it runs like an engine should. but i keep it clean. and clean all the filters. and keep up on the specs when it comes to lubeing. should i take the screw out of the hole until i get a screen or should i leave the screw in, and periodically unscrew it and let it drain the 1/4 teaspoon that accumulates once in a great while. thanks again for your encyclopedia of knowledge on these old tractors that we work so hard to keep running. to me it gives me great pleasure. thanks again abjahnke at docsue52@hotmail.com

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Dell (WA)

05-03-2004 20:12:48




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 Re: Re: Re: the very timy air -hole and discharge in reply to abjahnke, 05-03-2004 14:03:53  
Doc..... ....I too, don't like the concept of the carb suckkin' dirt thru that unfiltered drain hole. Iff'n yer consistant in tractor operations and TURN-OFF yer under the fuel tank valve, then you won't have any "overflow" from the carb float that can hydraulically fill-up yer cylinders and break stuff. (nasty)

Unfortunately, the "sinstered bronze" filter is NLA (no longer available) but just a couple of months ago, someone posted that some tractor supply outfit in Iowa? had a suitable replacement. Unfortunately, I don't remember the tractor outfit's name (CRS? eh?). I'll let you have the "pleasure" of doing some research of the "archives" of this great N-Board..... ..Dell

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ZANE

05-03-2004 17:58:23




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 Re: Re: Re: the very timy air -hole and discharge in reply to abjahnke, 05-03-2004 14:03:53  
I know something about cotton farming too!

It makes your back hurt bad!

Zane



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ZANE

05-03-2004 17:39:11




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 Re: Re: Re: the very timy air -hole and discharge in reply to abjahnke, 05-03-2004 14:03:53  
That hole should not be blocked. It is there to prevent liquid locking the engine. Liquid lock is when a liquid like fuel or water gets on top of the piston and locks the engine. Liquid will not compress and it can break something in the engine and beleive me it will if you try to pull or push the tractor or any other vehicle.

Do not plug that hole!

Zane



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abjahnke

05-03-2004 22:21:03




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 Re: Re: Re: Re: the very timy air -hole and discha in reply to ZANE, 05-03-2004 17:39:11  
i was out in the old shop today working on the ford. its my pet project,my hobbie, and also its a very good working tractor. today after reading your posts i decided to unplug it, but i did put a little foam rubber into the hole so the moisture can leak out. i figured too that ford never did anything without a reason. its just im alittle slow at realizing why he did do some of the things he did. The cotter pins in the holes under the pto , the differential, the motor, to release bypass oil that had slipped past the seals, and then sticking cotter pins in the holes so they wouldnt close with dirt and sludge. its so simple but so clever. i am constantly being amazed at the workmanship of these machines. i did completely clean all the aircleaner screens and giving them a light oiling, did the cover on the oil fill cap and re oiled. put new hoses on everything. so its running so smooth. next is the change the oils. last fall i pulled the radiator, and hosed it all out. thanks again for all your help gentlemen. i still have to come up with something better for that little hole, maybe a cotterpin wouldnt be a bad idea for the little hole. i dont have the hole thing unseated just a hole the size of a pencil lead. the cotter pin would minimize the amount of dirt allowed in, but the liquid would come out easy. at least until i find the right thing. talk to you all later , thanks, doc

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