BX1850 engine trouble

[Gary T.]

drag_slick,

If you were pushing snow down a hill in the spring, wouldn't that mean you were backing up a hill that was wet or covered in more snow. I would have to think that for you to starve your tractor for oil, the hill would be so steep that you wouldn't have enough traction when it was wet or covered in snow. I have backed up hills with my BX1860 that were so steep, if they were wet I would not have enough traction. Something doesn't add up.

Gary T.

 

[SPYDERLK]

puuuleease if the nose is down hill and the oil is not filled full in both sumps the lower sump will starve the oil pump if the angle of decline is steep enough and the oil pressure and splash lube cannot grab any oil!!!!!!

Up hill wont matter as the lower sump will be flooded due to the incline


The tip off was the oil sample report as the bearings were already damaged.

What in the heck are you talking about?

 

[dodge man]

Upper and lower sump? Are you sure this exists on a BX engine. I'm not saying it doesn't, but I've been under mine and that doesn't ring a bell. I think someone suggested to the OP that this is what happened to his machine and he jumped on board.

 

[drag_slick]

Yeah, no upper and lower sump on the bx1850 as far as I can see. I was backing up the hill in 4wd and chains on. I need to measure the slope. It is steep enough that I wouldn't go across the slope.

I've got the old block, crank, pistons, rods, bearings, etc. back at the house now if pictures of anything would help.

Just to clarify, it's not like I drove down and backed up the slope once and this happened, I cleared at least 500', so the tractor was nose down for the better part of a half hour or more.

 

[radioman]

drag slick- pictures always can help. you know we TBN'ers love pics!

Now, don't get us wrong, there no blame here, I doubt that running BX at an angle would do that much damage, but it would definately be a contributing factor. I just think there could be something else we may have missed here. We just need to put our CSI hats on and check it out. You also need to rememeber that there are MANY, MANY BX owners out there and they are cuoirus what EXACTLY happened. you wouldnt want the same thing to happen again to your second engine would you ? Knowing the internals of the BX engine will help us be a better BX owners I would say. :thumbsup:

 

[dodge man]

With chains on, I can see a couple of things happening that could cause it. You could have been working back and forth, causing the oil to slosh back and forth and starving it for brief periods of time. With chains on you could get on a pretty steep hill and get traction. It seems like when this stuff happens, you never really know what happens. You can see the damage, but unless its something obivious, like a clogged oil pick up, you don't know what failed. I'd take a look at the old oil pump, my gut reaction is the oil pump failed, but you never know, working on the hill like that for a long period of time could have done it in.

Like others have said, I'm just trying to learn so I don't do the same thing.

 

[leonz]

Yeah, no upper and lower sump on the bx1850 as far as I can see. I was backing up the hill in 4wd and chains on. I need to measure the slope. It is steep enough that I wouldn't go across the slope.

I've got the old block, crank, pistons, rods, bearings, etc. back at the house now if pictures of anything would help.

Just to clarify, it's not like I drove down and backed up the slope once and this happened, I cleared at least 500', so the tractor was nose down for the better part of a half hour or more.

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If its unsafe to transverse travel across the slope its above 15 degress for sure;


If I did not ask you this before please accept my apology:

Do you have two dip sticks for checking oil level? the two cylinders do or did.

IF your engine has 2 oil fill ports- one above the valve train and a second directly to the sump you will have two dip sticks even though you have one oil pan with or without a stepped oil pan.

the two cylinders are like this as well.


A while back one of the folks with an oil level question has an orange beast with two dip sticks and we went through this isssue with him as he was coming up short on oil and he did no check both dipsticks, he was worried about oil being trapped in the valve train etc.-but it drains down and as the sump was low every time he checked it he was worried.

 

[dodge man]

I'm pretty sure BX's have a single sump and a single dip stick. I know what you are talking about, but it's not the case with a BX.

 

[leonz]

Isnt there a second oil filler-tube and cap by the spin on oil filter? We had one on the two cylinders on the two wheel drive boss buggies but we could not reach them due to the clearance issues and used the one on top.

I am wondering if his D722 has the second lower dip stick on the left side like the 2 cylinders as the dip stick on the right side is the longer one?

The other question is whether he has kept one gallon of oil in the sump as it is a 3 liter sump?

The kubota site only shows the right profile of the D722 with the oil filler over the valve train and the longer dip stick for the crankcase.

If the angle was above 15 degress in decline it would be possible for the oil to splash out of the breather as it is open to atmosphere
as he was operating with the nose down hill and as he backed up the oil would be sloshing back and forth until the oil level was so low it would not splash out the breather.


The oil pump and fuel pump are driven off the crank bevel gearing If I remember right anyway and if the oil is low and the angle is severe enough where its sloshing out the breather the little oil remaining will be pulled by the pump and starve the crank bearings while under load.




leonz