B1750 oil overflowing

[chrisjbell]

Hi all,

It isn't my tractor, and I wasn't using it at the time, but a friend has a B1750 and I noticed that it was dripping oil. It started out as a pretty slow leak, but as the tractor was used longer it got pretty bad. After he got worried enough about it and shut it off we figured out the oil was coming out of the overflow.

Checked the oil level, and it is all the way up the dipstick.

This can't be right, I'm sure ;-).

He says this has happened once before and all he can remember doing to correct the problem was to change the oil a couple of times. I can't imagine a problem that would be solved that way, unless the oil filter is simply clogged (which would only take one oil change, I'd think).

Anyone have any ideas what would cause it? Better yet, any ideas on how to fix it?

Thanks...Chris

 

[Volfandt]

I'm not very knowledgable about your particular model but theres three ways the oil level will increase in a tractor and all three involve a leak. It's either fuel, hydraulic fluid or coolant.
Collect some of the leaking oil on a rag or something and give it a good smell. If it smells like diesel fuel then I'd guess theres a leaking seal on the injector pump and the fuel is getting into the crankcase.

Depending on how the hydraulics are pumped, i.e. where the pump & resevoir are located, hydraulic fluid may be leaking around a seal. Check to see if the hydro fluid gets low when the oil level gets high.

A coolant leak is easier to detect. The oil will turn to a milky brown to white and the exhaust will start to blow a white cloud of smoke when running. If the head gasket is blown you can see bubbles in the radiator (this is from cylinder compression leaking into the coolant system.

Good luck
Volfandt

 

[chrisjbell]

Ah, the good news is that it isn't my tractor .

It is hydraulic fluid in the oil. The hydraulic fluid reservoir was pretty much emptied into the engine crankcase.

He wound up dumping all the oil / hydro mix out of the engine, put on a new filter. Hydro fluid wasn't even showing on the dipstick.

Started it up, ran for a while, carefully not using loader or 3PH. Stopped, checked engine oil - still OK. Added just enough hydro to hit the "low" mark on the dipstick. Ran, stopped, checked, all OK. Ran, used loader, stopped, checked, all OK.

So it has now run OK for maybe an hour or two of light work, some with the loader. He's keeping the hydro fluid low deliberately (I'm not making any judgement call on that, just reporting the facts). It seems to be working OK for now, so ???.

Thanks for the reply, Volfandt

 

[Volfandt]

Thanks for the update. Such info will help out others on down the line.

Sounds like the rear engine seal is shot or theres another seal thats above it thats shot. I'd say the tractor will have to be split to repair the leak in any case.

He's driving a time bomb now. The hydro fluid can turn a bearing eventually plus the added fluid can blow other seals. Talk about making a mountain out of a mole hill

It'll be cheaper now to fix it than later.

Good luck to him
Volfandt

 

[Egon]

A leak of this nature should be fixed as soon as possible.

Running the hydro with no oil is not good. Running the engine on hydro oil and overfilled is also not good.

It's fix time now or fix me later at about double the costs. If economics come into play just park the tractor till a fix can be made.