| jtserenityln | -- 08-27-2012 @ 11:44 AM |
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Can anyone give Me the correct oil capacity or level depth for a 35' Tudor sedan Donaldson hat type oil bath air cleaner? Mine has no markings what so ever! Thanks for any and all info. ***JT***
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| Stroker | -- 08-27-2012 @ 3:59 PM |
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JT: I don't have a definitive answer to your specific model of Donaldson air cleaner, but in principle, the air flows from the annular space between the outer bowl, across the top surface of the circular reservoir, and up into the oil-wetted mesh leading to the carburetor. If the oil is too high, the airflow cannot make this trip, and of course the engine cannot breathe. The operating principle is that in making a sharp 180 degree turn, abrasive solids such as fine silt, become impinged onto the top of the oil "sump", and are captured to settle-out as solids in the bottom of the outer bowl. If the level is too low, then much of the debris-laden intake air will make the turn without shedding the abrasive solids. A 3/8 inch gap at the bottom of the skirt around the mesh section should allow sufficient air and a sharp enough turn of the airflow to accomplish the inertia particle separation, and yet allow sufficient air to the engine. While there are no marks per se, you should be able to experiment at achieving a good operating level. If you check your aircleaner at 1000 miles, and there are no solids in the bottom, the level is probably too low. I always use non-detergent oil in the air cleaner, as it allows the solids to precipitate out quicker.
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| supereal | -- 08-28-2012 @ 8:27 AM |
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As Dan points out, the effectiveness of oil bath air cleaners depends upon the inertia of the dirt particles to contact the surface of the oil pool. Henry Ford had some unique ideas about filters. He didn't think they were necessssary, even in the days of dirt and gravel roads. He decided to design the updraft carbs on his early cars so the intake would face to the rear of the vehicle. He theorized that, while moving forward, the dirt would flow back past the intake, rather than enter it. Until more effective filter media was produced, the oil bath was the best that was offered. Today, filters on large engines, such as truck diesels, use a different kind of inertia effect by creating a swirling flow that causes the particles to fall into a reservoir. For most applications, the "paper" filter is vastly more effective than the oil bath, and certainly less messy. Converting the oil bath unit to paper isn't difficult, and increases the protection from contamination. Many original oil bath cleaners have developed internal leaks from rust, as a sticky film on top of your engine shows. This message was edited by supereal on 8-28-12 @ 8:28 AM
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| 40 Coupe | -- 08-29-2012 @ 6:49 AM |
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Look for a line stamped into the metal it is the full mark. I do not have a Donaldson handy but the United full mark is approximately one inch from the bottom. Not a lot of oil. If you overfill it much of the excessive oil will wind up down the carb.
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