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Tractor Talk Discussion Forum

Air Cleaners

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37 chief

08-14-2005 08:56:25




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Most of my tractors are old, and have oil bath air cleaners. I have a JD with a paper air filter. which air cleaners would you say provide the best protection from dust entering the motor. Stan in calif




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Mike M

08-14-2005 10:28:00




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 Re: Air Cleaners in reply to 37 chief, 08-14-2005 08:56:25  
I'm with Wayne I think the oil baths did a fine job,plus it was a whole lot cheaper to maintain.

I do remember reading something about they switched to dry filters because of mounting problems as oil had to be keep level and also the larger engines required a very large filter assy.



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dhermesc

08-15-2005 06:09:19




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 Re: Air Cleaners in reply to Mike M, 08-14-2005 10:28:00  
The increase in air flow also requires a substantial increase in the size of the "oil bath". The thing would be HUGE on a IH DT466. On older smaller engines with less air flow they are great.



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NC Wayne

08-14-2005 09:18:24




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 Re: Air Cleaners in reply to 37 chief, 08-14-2005 08:56:25  
Hey Stan, when they started making paper air cleaners it was a step back in protection for the engine. An oil bath cleaner will provide far cleaner air to the engine than any of the paper ones will. The biggest reason when the OEM's started getting away from the oil bath type as usual wasn't thinking about the life of the machine, that's secondary, they were simply making things more convient and less messy for the operator. Not to mention it made another replacable part for them to sale. So if you don't mind changing the oil in the air filter then by all means leave the oil bath type on it, the engine will thank you later...

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SMA in NE

08-14-2005 13:34:34




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 Re: Air Cleaners in reply to NC Wayne, 08-14-2005 09:18:24  
I don't think I agree with you about oil bath filters doing a much better job than the paper filters that have been common for years now. Car and pickup motors made in the last 20 years definitely have a longer life than their earlier counterparts. I'm sure that other reasons add to long engine life other than a better air filter but the paper filter obviously has not shortened the useful life of these motors.

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NC Wayne

08-14-2005 23:13:56




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 Re: Air Cleaners in reply to SMA in NE, 08-14-2005 13:34:34  
I've been in the equipment repair business all my life and though I can't name all the different sources I've read that said the oil bath filter was better I can tell you that there have been quite a few. Not to mention the observations I've made in the field when opening intakes and intake piping of the different type systems. In an oil bath filter that is properly maintained ALL the air entering the engine actually passes through the oil, hence the name "oil bath". In doing so the heavier dirt particles get slowed down enough by the oil to drop out of the air stream and settle to the bottom of the oil. Too the oil vapor that developes in the inlet neck will coat the incoming dirt particles with oil making them sticky so they cling to each other which makes them heavier and easier to settle out when they acutually get into the oil, or they stick to the walls of the inlet so they never make it into the bath at all. In an oil bath air cleaner the "micron rating" is essentially zero because the air is actually sucked through the oil. Now take your typical paper or foam element type air filter and see what the micron rating on one of them is. Have you heard that as they get dirty they become less effecient but they provide cleaner air? This is because as they get dirty the holes in the paper cloes up due to the dirt particles they catch so they can catch progressivly smaller particles til the close completely off. So, basically with a paper element filter it will only filter the portion of the air/debris/dust that falls below a certain micron rating while the oil bath filters EVERYTHING. True the paper elements get the air fairely clean and you might not actually notice that much difference in the life of the engine, but if you've already got the best system on the market, why back up?

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Dr.EVIL

08-15-2005 10:49:44




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 Re: Air Cleaners in reply to NC Wayne, 08-14-2005 23:13:56  
I'm going to have to side with SMA saying the dry pleated paper elements are better. Some of the smallest particles of dust/dirt really don't increase wear in engines all that much. You look at DONALDSON's website and compare performance figures for both oil bath & dry-type air filters and the dry-type remove much more dust/dirt, in some cases 99.5% verses 90-95% for oil bath air cleaners. In fact most oil-bath filters aren't even rated. You compare the steel mesh that's coated with oil that's supposed to collect the dust/dirt out of the air and the holes in it are MUCH larger than the holes in the paper element.

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