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John426 
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Joined: 14 Aug 2012
Location: France
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 Topic: Oil deflector on model C
Posted: 02 May 2019 at 4:08am |
Hi
Some Model B or C or CA have an oil deflector on the cylinder head.
If it is useful , why it is not on all engine tractor model? Is it an improvement on the valve guide lubrication or other use?
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Dick L
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Joined: 12 Sep 2009
Location: Edon Ohio
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Posted: 02 May 2019 at 7:40am |
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I bought and tore down 7 0r 8 B's and the same for the C's plus 3 CA's. I have yet to see the oil deflector on any I tore down. All were old tractors that were not running when I bought them. They were either discarded for some reason or not all had them for what ever reason.
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John426
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Location: France
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Posted: 03 May 2019 at 1:59am |
This is strange, one of my B haven't and my C have one.
I don't really understand , what is the use of this deflector, and why some have it , and other not?
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John426
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Location: France
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Posted: 03 May 2019 at 4:55am |
These are the pics of the cylinder head with the deflector. It is more clear than the drawing
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Dick L
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Posted: 03 May 2019 at 5:22am |
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Thanks for the picture!
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Lonn
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Posted: 03 May 2019 at 6:34am |
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I've seen them before. I have one on the shelf just like it. I saw one once on a C and several similar to it on WD and WD45 engines. My 1952 WD has one similar. I looked on AGCO Parts and it lists it for that 125 cid engine when used on a 60-H. Now what is a 60-H? Hillside All-Crop 60 combine? Also it lists a similar deflector for WD45 engine serial number 45-13087 & up. Helps with lessening oil consumption at the valve guides??? I can't remember how the one on my WD was configurated.
Edited by Lonn - 03 May 2019 at 6:37am
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Butch(OH)
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Location: Lucerne Ohio
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Posted: 03 May 2019 at 6:39am |
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I had a B125 power unit that had one of those on it.
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John426
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Posted: 04 May 2019 at 8:27am |
May be it is only for the power unit engine
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CrestonM
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Posted: 04 May 2019 at 10:53am |
 Lonn wrote:
I looked on AGCO Parts and it lists it for that 125 cid engine when used on a 60-H. Now what is a 60-H? Hillside All-Crop 60 combine?
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sandman2234
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Posted: 04 May 2019 at 9:07pm |
. David from jax  
Edited by sandman2234 - 04 May 2019 at 9:19pm
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John426
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Posted: 01 Mar 2021 at 12:28pm |
Hello Does anyone find the reason of that deflector?
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C in Concord
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Posted: 01 Mar 2021 at 2:00pm |
Typically things like deflectors are added to prevent oil from vacating certain areas. The thread suggests that the deflector was only used on hillside combine power units. Could be that AC figured those power units would spend considerable time sitting at an angle (like on hillsides) and added the deflector to keep the valve train lubricated and/or the oil draining back to the sump properly.
Ben
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Leave things better than you found them.
1941 Model C (restored 2020)
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PaulB
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Posted: 01 Mar 2021 at 5:30pm |
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I have seen them on original tractor engines that were known positively to have never been apart. That "deflector" Was to keep excessive oil away from the valve guides. In more modern times rubber stem seals do the same job and sometimes too good. When I do a valve job I do not put stem seals on the exhaust valves as I've had engines come to me for stuck valves that the stems looked very dry. The intakes will suck a little harder and get oil to them, unlike the exhaust valves.
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If it was fun to pull in LOW gear, I could have a John Deere.
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Lon(MN)
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Posted: 02 Mar 2021 at 7:32am |
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I am finishing an engine with that deflector in it. I think I am the first one in this engine. No marks on the rods. It was in a B but it has a CR on the engine serial number. The thrust was wiped out which is the case with many power units. It will go on my 60 engine drive combine.
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