Oil leaking out the overflow tube: Kubota Review  -- Kubota Tractors Discussion Forum and Review Oil leaking out the overflow tube: Kubota Review -- Kubota Tractors Discussion Forum

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 05-01-2002, 22:26 Post: 38037
Morgan Wright
2002-05-01 22:26:54
Post: 38037
 Oil leaking out the overflow tube

I have a huge engine oil leak in my B-6200, from the engine overflow tube. My tractor leaves a trail of oil everywhere I go. But every time I check the oil it's at least a quart too high. I thought maybe there was a crack in the engine block and coolant was getting in, but the coolant is still full to the top. So I figured that diesel fuel was getting into the block, but I smell the oil on the dipstick, and it doesn't smell like diesel. So I thought maybe I just overfilled the engine with oil at the last change, but that was 2 months ago and last month it wasn't leaking.

Where's all this extra oil coming from?






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 05-02-2002, 06:03 Post: 38048
TomG

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 Oil leaking out the overflow tube

The overflow tube probably is what I'd call the crankcase breather pipe. Excessive engine oil can put quite a bit of oil out the breather pipe and also may produce white exhaust smoke.

One possibility other than coolant and fuel for mystery oil is that it's hydraulic oil. There is a path from the hydraulic pump to the crankcase on many engines where the pump is driven directly off one of the gears under the timing gear cover. On some pumps something simple like a blown shaft seal might put hydraulic oil into the crankcase. It might have a more serious problem on other pumps. Keeping track of hydraulic oil level and hydraulic performance seems like a pretty good idea unless the pump and engine are isolated form each other.






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 05-12-2002, 00:28 Post: 38514
photios@werple.net.au
2002-05-12 00:00:00
Post: 38514
 Oil leaking out the overflow tube

There is a known problem caused by a oil gallery plug becoming dislodged at the rear of the head. Causes a massive oil build up on top of the head and low oil pressure. If you have this problem - you may need to remove the rocker cover to check a replacement plug is avaialable.






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 05-12-2002, 07:09 Post: 38522
TomG

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 Oil leaking out the overflow tube

I have heard of the lug problem in some older Kubotas. I heard that an aluminum plug on the end of the rocker arm shaft has been replaced by a steel plug that is less likely to become dislodged.

That's a good piece of information. I suppose such an explanation might be consistent with persistent high oil levels if somebody checked the oil level before oil drained down from the head and added more oil.






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 07-22-2002, 17:46 Post: 40583
FarmerWannabe



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 Oil leaking out the overflow tube

I, too am having this problem. I replaced the fuel pump and continued to have the problem. My hydraulic level does go down soIi am pretty confident thatit is the problem. I intend to fix a seal/gasket or replace the pump ($350!).
I will let you know what happens.
Has anyone had any experience fixing or replacing this pump? Is it difficult?






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 07-23-2002, 06:52 Post: 40599
TomG

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 Oil leaking out the overflow tube

The difficulty of replacing a hydraulic pump shouldn't be difficult but would depend somewhat on the tractor. I'd follow a repair manual procedure. For my Ford, There is some wiring and part of the starter that have to be removed for access and there is a PS priority valve that is removed along with the pump. However, mostly its bolt in and out job. There are new o-rings to install but there is no mention of a need to prime the pump. I believe I'd still fill the pump and suction line as much as I could before reassembly.






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 07-23-2002, 09:55 Post: 40606
Art White



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 Oil leaking out the overflow tube

Morgan your hydraulic pump is the cause of the problem I believe if you check the transmission oil you might find that down at this time. The only other thing it could be would be the injection pump but I put that as the second leading cause on these tractors for your problem.






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 07-24-2002, 02:40 Post: 40621
Morgan
2002-07-24 00:00:00
Post: 40621
 Oil leaking out the overflow tube

I think maybe I just added too much oil when I changed the oil. It stopped leaking finally. I think. I hope. I'll find out if the tranny oil level is low but it's never been low.

What's an injection pump?






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 07-24-2002, 04:30 Post: 40624
TomG

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 Oil leaking out the overflow tube

An injection pump is a fuel pump for diesel engines. They shouldn't be tinkered with without considerable mechanical experience and proper equipment. The position of the pump's rotation must match the engine position. Adjustment of the position is called pump timing or spill-time adjustment. One adjustment on many pumps is made by loosening a collar on the pump drive shaft. If the collar is loosened and the pump moves relative to the engine, then the pump must be re-timed. Some old Ford farm tractors have a graduated scale on the pump that allows owners to change the timing without performing a full adjustment but I haven't heard of a compact like that.

When monitoring the hydraulic oil level, I'd keep in mind that the 3ph and loader positions affect the sump oil level. Unless an implement with really large cylinders is used, the usual practice is to fully retract all cylinders and then bring the oil up to the full mark.






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 07-24-2002, 07:41 Post: 40631
Morgan
2002-07-24 00:00:00
Post: 40631
 Oil leaking out the overflow tube

So an injection pump can leak diesel oil into the motor oil? The oil on the ground smells like regular motor oil. The other possibility you guys were saying was the hydraulic pump leaking into the engine. I wonder if hydraulic oil has a distinctive smell. I will make sure and smell it again.

The weird thing is, no matter what's leaking into the engine, why should the oil be leaking out the overflow tube at all when the engine dipstick does NOT say that it's over filled? The engine dip stick says it's right on!! The only time it stops leaking is when the engine dipstick says it's about a quart low, then it stops leaking from the overflow tube.






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Discussion Boards > Active Subjects > Messages as Posted > Kubota Review Forum

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Art White 4 | Billy 1 | DRankin 1 | FarmerWannabe 1 | Fitch 1 | Morgan 11 | Morgan Wright 1 | photios@werple.net.au 1 | TomG 9 |




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