Diesel fuel in the oil

[Smitty 48]

I have an FB31 White with 2000 hours that runs ok but now it's getting diesel fuel in the oil big time. Rings bad?

 

[Junkyard Jim]

I'm not familiar with that model, but it could be the injector pump. Some of them will dump fuel in the pan if they get a hole in the diaphram or if a seal goes bad. Does it smoke when you run it? What color is the smoke if it does?

 

[coveredbridge]

If it has a mechanical fuel pump, that could also allow fuel to enter the crankcase if the diaphragm fails.

 

[Smitty 48]

It has an Iseki E3AD1 3 cylinder engine. Plenty of power. Only smokes when I start it which it has always done. I'm going to have to find a manual on the motor. All I have is the owners manual on the tractor which doesn't mention the fuel pump. Thanks for the replies!

 

[Pepsiboy]

I have an FB31 White with 2000 hours that runs ok but now it's getting diesel fuel in the oil big time. Rings bad?

Smitty,

Sounds to me like the shaft seal on the injection pump has failed. Pump needs to be removed and PROBABLY rebuilt. maybe you can get lucky and only have to replace the shaft seal. IMHO.

Dave

 

[Smitty 48]

Smitty,

Sounds to me like the shaft seal on the injection pump has failed. Pump needs to be removed and PROBABLY rebuilt. maybe you can get lucky and only have to replace the shaft seal. IMHO.

Dave

I think you're right. I ordered a service manual for the tractor today and hopefully it covers that. Thanks!

 

[coveredbridge]

Before you start with the injection pump, try to make sure the fuel pump isn't the culprit. It would be a lot less $$ and trouble to fix than the injection pump.

 

[Smitty 48]

Before you start with the injection pump, try to make sure the fuel pump isn't the culprit. It would be a lot less $$ and trouble to fix than the injection pump.

Good idea....I took the fuel pump off yesterday. It's a Mikuni mechanical pump that runs off a cam (The same cam runs the injectors I think) located under the injector pump. It has a little lever that is used to prime the lines to the injector pump. I plugged the output side of the pump (pump removed) and operated the lever. Residual fuel in the pump was squirting out a small hole in the rod that runs on the cam. I thought that odd. So I kept the output plugged and blew in the input line to see if fuel came out the little hole but it didn't. I searched all last evening for another pump like it on the web and all I came up with was pulse pumps by Mikuni. No cam operated pumps. The darn tractor is still running good, it's just this fuel in the oil issue. Thanks for the reply!

 

[Ivan49]

Do you have an AGCO dealer close by? I can get you the part number for that pump and you can see if it is still available

 

[Smitty 48]

Do you have an AGCO dealer close by? I can get you the part number for that pump and you can see if it is still available

I think Coulter's is. I bought a front axle for the tractor from them a while back. I'd appreciate the part number. Thanks!