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1947 late styled Model A crankcase vent


 
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CharlesTx
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Joined: 30 Oct 2008
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PostPosted: Tue Oct 09, 2012 5:01 pm    Post subject: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

How does the crankcase vent on a late styled model A? I replaced and cleaned the vent tube that runs from the valve cover to the air breather. It that it, or should I be aware of another vent area?
 
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Greenday
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Joined: 08 Jun 2008
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Location: NW Missouri

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PostPosted: Tue Oct 09, 2012 5:16 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

That just vents the valve cover
 
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CharlesTx
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PostPosted: Tue Oct 09, 2012 5:19 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

So, how does the crankcase vent?
 
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Nathaniel Watts
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PostPosted: Tue Oct 09, 2012 5:33 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

There is a ventilator pump on the governer end of the fanshaft. It feeds throught the shaft tube back into the breather.
 
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CharlesTx
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PostPosted: Tue Oct 09, 2012 6:07 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

It looks like the 47' vents through the fan shaft and has a vent tube located behind the fan. I will check the govenor area to see if I can find a vent. My question is after setting for over 25 years what should I check to make sure the crankcase is venting correctly.
 
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CharlesTx
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PostPosted: Tue Oct 09, 2012 6:08 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

It looks like the 47' vents through the fan shaft and has a vent tube located behind the fan. I will check the govenor area to see if I can find a vent. My question is after setting for over 25 years what should I check to make sure the crankcase is venting correctly.
 
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bunghammer
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PostPosted: Tue Oct 09, 2012 6:27 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

It breaths by the suction of the intake manifold that has a tube to the valve cover.
 
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BushogPapa
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PostPosted: Wed Oct 10, 2012 4:23 am    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote


The actual "Venting" gets done at and behind the Clutch-Drum...
I am sure you have seen some signs of vapor escaping from that area as the engine warms-up..

One thing to be aware of...GREASE that front Fan-Shaft Bearing at least once every year..
It is so often forgotten and the sound never seems to come from that area..it sounds like a bearing IN the Governor...
Ron..
 
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Kent Petersen
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PostPosted: Wed Oct 10, 2012 5:20 pm    Post subject: Re: 1947 late styled Model A crankcase vent Reply to specific post Reply with quote

the vent pump is on the gov. end of the fan shaft. it pulls clean air from the air cleaner by a tube behind the fan air is pumped out to the gov case and crank case vaper from crankcase exits out tappet cover and is burnt in the cyls one of the frist pos. crankcase vents even before the gov got involved
 
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