1945 John Deere B (Styled) - Water In Air Cleaner Oil

steamguy14

New User
I'm working on my first Deere (Farmall guy) and am about wrapped up with it (just getting it to run). Everything looks and sounds great, except for the fact that the oil in the air cleaner bowl keeps turning milky white due to water getting into it. I can't see any cracks anywhere where water may be getting in. Also, I only ever filled it to the fill line with 30 weight oil. Anyone have any ideas as to what is causing this?
 
Photo:
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Wow. I was gonna suggest some condensation or wet damp conditions, but that looks like half water / half oil. I cannot imagine.
 
With that much water, it shouldn't even run if its injesting so much. You should see it in the carb and dripping out the small hole in the intake tube at the carb. Though you may have slight condensation, thats excessive. But, it appears there is no coolant. If you are parked outside, cover the intake tube with a bread wrapper or something similar. Its coming from up high and moving down. Remove the air cleaner wire mesh and clean thay also. You might need to remove the entire assembly.
 
You need a new intake stack or start using cans. Pooled water/dirt has rusted thru the up portion of the intake stack and now allows rain right in. If I remember correctly the 45 ounce size tin can works fine for the intake but should have extra weight glued on top with silicone or ? as without extra weight, they blow right off in very good winds just in time for more rain. Something along the size of a pet rock will do, they tend to crawl up as the wind blows hard but changes directions slightly as well. The weight acts to cause the can to fall back down and keeps the crawling motion from getting any traction. You can easily forget to take the can off the intake when starting, but the exhaust can always reminds you it was still on the stack.
 
Its common if you dont keep air stack coverd same as the muffler, Ive seen it alot and also keep it serviced
 
After looking at your photo below, it appears that rain water is coming down the air stack.

Several good options have been discussed below to cover the air stack.

You might also consider using an old, thick, folded work sock.

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It just might shed the rain water, doesn't hurt the paint, won't rattle or blow off, and keeps the dirt/mud daubers out.

Hope this helps.
 
Wait a minute, wait a minute. Don't know the first foggiest thing about JD, but you mean to tell me they are designed to take on water down the air inlet pipe as they sit there idling, in the rain? You mean they will fill up with water sitting there running in the rain? Good grief!
 
Take a look at the diagram below.

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Note the air stack (Key 6), air cleaner bracket (Key 7), and the air cleaner with oil cup and clamp (Key 28).

Take a look at the photo below of the air stack on "Uncle Earl" our 39B.

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If the tractor is left outside without any type of cover, whether idling or not with the air stack uncovered, then rain water will fall into the air stack.

Take a look at the air cleaner bracket from "Lazarus" our 40B.

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The rain water flows from the air stack into the air cleaner bracket them down through a pipe in the middle of the air cleaner.

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The rain water flows from the air cleaner pipe into the inner oil cup.

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Hope this helps.
 
Not at all, no sir, not one word of that. Rust has defeated the waterproof design of the stack is what has happened. Inside construction of the location of this particular defect is not being depicted here, but you can see the 'waterproofing' up portion thru the rectangular slots of the stack where the problem exists. Rain normally won't be drawn into the upper three inches of the stack to then enter the oil bath reservoir running or not, but it will leak thru a hole rusted out thru the up portion starting below the rectangular air inlet slots. Worked for 50 years before the rust defeated it. Much better life than what detroit offered during the 70s.

Could be repaired easily if only they came apart easily which they don't. No parts for it is another issue.
 

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