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That lip below on my 04 TCb in the return to pump was eliminated after a few years and i don't think it was on the TC.
So briefly, where is oil route after leaving oil tank on my 04 TCb in 6 month sitting. It has 15W-50 Mobile 1 and a OEM filter. 50 k on it.
Not sure what you are trying to show, or why...but.... I'll try to explain
The crank shaft is mounted in bearings between two cases. One case, on the primary side, and then the other case on the cam side. The bottom of the area between the two cases supporting the crank shaft is the sump. Outboard of this sump area on the cam side, is the cam chest. The cam chest is where the oil pump resides.
I have attached a pic of a cam chest side case (the first pic), split open and resting on the cam chest.
The hole you see in the bottom right under the "lip", is the crankshaft side of where the snorkel from the oil pump mates to the case, sealed by the o-ring I mentioned in my above post. (I added an arrow). That is where the suction from the scavenge side of the oil pump, draws the oil from the engine sump.
The pics are from a 2012 Road Glide that I took apart about 8 months ago with a crankshaft problem. It still has a "lip". That "lip" forms a pocket/chamber in the bottom of the sump, to assist and guide the oil in the crankcase sump, to the snorkel of the scavenge side of the oil pump, so the oil can be scavenged back to the oil tank. All Twin Cam bikes, from '99 until '17 have a similar design.
The bike I was working on in the pics, had the crank shaft shift, and the primary side thrust bearing on the crank was destroyed. Metal went through the scavenge side of the pump. The bigger pieces settled in the engine sump, unable to be drawn through the hole leading to the pump. The smaller pieces settled in the oil pan. I have no doubt some of the smallest, almost powdered looking debris, went through other parts of the engine, at least to the oil filter.
Now, to specifically answer your question, when a softail sits for a long time, and the oil from the elevated oil pan seeps past the gerotors in the oil pump, it will come out the scavenge side of the pump, from the "snorkel". It will be directed through that hole in the case with the arrow, and settle in the bottom area, between the two cases, AKA: the sump.
I have attached two pics.
The first is the cam chest side of the sump, with an arrow showing where the oil pump draws the oil from the sump.
The second is the primary side case, showing that well formed pocket/chamber at the bottom of the sump where oil goes to be scavenged.
Not sure what you are trying to show, or why...but.... I'll try to explain
The crank shaft is mounted in bearings between two cases. One case, on the primary side, and then the other case on the cam side. The bottom of the area between the two cases supporting the crank shaft is the sump. Outboard of this sump area on the cam side, is the cam chest. The cam chest is where the oil pump resides.
I have attached a pic of a cam chest side case (the first pic), split open and resting on the cam chest.
The hole you see in the bottom right under the "lip", is the crankshaft side of where the snorkel from the oil pump mates to the case, sealed by the o-ring I mentioned in my above post. (I added an arrow). That is where the suction from the scavenge side of the oil pump, draws the oil from the engine sump.
The pics are from a 2012 Road Glide that I took apart about 8 months ago with a crankshaft problem. It still has a "lip". That "lip" forms a pocket/chamber in the bottom of the sump, to assist and guide the oil in the crankcase sump, to the snorkel of the scavenge side of the oil pump, so the oil can be scavenged back to the oil tank. All Twin Cam bikes, from '99 until '17 have a similar design.
The bike I was working on in the pics, had the crank shaft shift, and the primary side thrust bearing on the crank was destroyed. Metal went through the scavenge side of the pump. The bigger pieces settled in the engine sump, unable to be drawn through the hole leading to the pump. The smaller pieces settled in the oil pan. I have no doubt some of the smallest, almost powdered looking debris, went through other parts of the engine, at least to the oil filter.
Now, to specifically answer your question, when a softail sits for a long time, and the oil from the elevated oil pan seeps past the gerotors in the oil pump, it will come out the scavenge side of the pump, from the "snorkel". It will be directed through that hole in the case with the arrow, and settle in the bottom area, between the two cases, AKA: the sump.
I have attached two pics.
The first is the cam chest side of the sump, with an arrow showing where the oil pump draws the oil from the sump.
The second is the primary side case, showing that well formed pocket/chamber at the bottom of the sump where oil goes to be scavenged.
I hope this info helps...
TCb first few years were different...Picture is from USER TwinCam ..think 2002.. Not sure if still here. He was a diesel mechanic.
The pocket maintains a little splash oil that's constantly being changed. The motor turns counter clock wise looking at the sprocket side, so basically spinning 2" or so of oil around the inner circumstance of the case.
My bike doesn't have an issue in a month. You can see it a little on the stick in 3 months. I don't think it's an issue worth tearing it down.
Running is normal and it doesn't sump running. However, if we do, I will check out oil pump dimensions for any wear or face grooves.
Not sure if you're as paranoid to AI as some on here, but seen enough of your post to know you know enough to see bad engineering info..
Google the below and click the AI to summarize.
Is it possible for the oil in the oil tank on a Harley-Davidson 2004TCb motor to drain down in the motor in 6 months?
My bike doesn't have an issue in a month. You can see it a little on the stick in 3 months. I don't think it's an issue worth tearing it down. Running is normal and it doesn't sump running. However, if we do, I will check out oil pump dimensions for any wear or face grooves.
Not sure if you're as paranoid to AI as some on here, but seen enough of your post to know you know enough to see bad info..
Google the below and click the AI to summarize.
Is it possible for the oil in the oil tank on a Harley-Davidson 2004TCb motor to drain down in the motor in 6 months?
With only a little low on the stick in 3 months, I agree... You don't have an issue. I wouldn't bother with tear down barring any other symptoms.
I thought you had reported it drained frequently and you needed to get to 30mph for the oil to be scavenged back into the oil tank, my bad...
As to the question about oil draining into the sump..... IMHO, I'm sure it is probably possible. Personally, I have never seen more than like 1/2 quart, and that was after a long period of non-use.
Again, IMHO, if a lot of oil were to drain in a short period of time, that would suggest to me severe oil pump wear and would be worth investigating. At least by checking oil pressure with a mechanical gauge.
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