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 | MisterMike
Join Date: Jul 2005 Posts: 12 New Hampshire 
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2011-11-14 181209
I can never seem to get the oil level correct after changing it on my 3540. It's almost always a quarter or a half inch above the maximum level on the dip stick. It's a real pain to drain out some of the new oil. Does this hurt anything?
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 | auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto 
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2011-11-14 181211
It's a pain to drain overfill, and leaving it can be harmful. Good practice to underfill and use the stick to determine when the right amount is in. Give the new oil time to settle before taking the level. ....
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 | kthompson
Join Date: Oct 2005 Posts: 5275 South Carolina
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2011-11-16 181236
Can you use a suction pump to pull the amount you need using the dipstick tube? Just wondering how much oil does it take to have it an half inch high? That seems like a good bit. ....
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| MisterMike
Join Date: Jul 2005 Posts: 12 New Hampshire
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2011-11-17 181246
This tractor engine is really strange. I add the proper amount of oil and start it up for a minute to fill the new filter and when I check it after a minute or two of rest, the oil is at the proper level. When I check it again the next morning, the oil registers as over-filled on the dip stick.. ....
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| auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto
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2011-11-18 181252
That clarifies the problem: some engine designs require a longer settling time to show the level accurately. So just go with that.
As I said, underfill, run it a minute, and check the stick -- but on that machine do the check in the morning. (Have the machine on a reasonably horizontal surface, and when inserting the stick make sure it's seated all the way down.) ....
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| Justus
Join Date: Jun 2002 Posts: 179 Justus, Pa.
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2011-11-18 181254
If you can, add oil to the new filter before you put it in place. You'll have to keep adding it a few times as it fills up the new filter. ....
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 | DennisCTB
Join Date: Nov 1998 Posts: 2707 NorthWest NJ
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2011-11-18 181263
I made a overfill error on a 16HP twin Generator, wow what a lot of smoke :) So overfilling is not a good thing and needs to be corrected asap! ....
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| auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto
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2011-11-19 181278
Does this hurt anything? Is smoke an issue?
A common answer is that the oil will be over-pressurized and blow past seals but I don't think so.
It depends on engine design, RPMs, and the amount of overfill. You don't want fast-moving parts (in most non-overhead designs the crank lobes) whacking the elevated oil surface because (1) frothing the oil makes it less effective as a lubricant, and (2) the shock that the part was not designed for could break it. ....
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