Diesel mixing with motor oil??? Help

Same thing happened to the no 10 diesel engine

any ideas where the source of the problem could be?

any ideas where the source of the problem could be?

Look in parts book for your serial number to see if there is a plug on the governor end of the fuel pump housing with a second 8B4967 o-ring sealing it. Later machines had a pump housing with the fuel gallery stopped from going all the way through to the governor end so they do not have the plug with the second o-ring there. If that one is leaking you probably would see that the oil level in the injection pump was overfull and the oil diluted.

The seal on the ferrule between the filter tower and injection pump housing usually leaks directly into the engine crankcase without accumulating anywhere else first.

Note that the 8B4967 seals are round o-rings. The old ones will not look like that. They typically are triangular cross-section from being squashed for several decades or more, but they started out round.

There is no timing issue removing and replacing the injection pump and governor. The pump drive tang is offset in the accessory drive and mating pump camshaft so it cannot mate back together 180° out like pumps on many other brands. The same goes for removing the governor if required, nothing is going to fly out and be lost when it comes apart!

Happens allot with old machines that havent been gone through since new. Theres an oring between the fuel filter housing and the injection pump housing that goes bad. Also the transfer pump seals can leak but that has a drain tube. Seal # is 8B4967 there is a ferrule that may be pitted also that seal fits on, thats a 2A3855. You will need to get the gaskets to remove the governor and pump housing also.

Look in parts book for your serial number to see if there is a plug on the governor end of the fuel pump housing with a second 8B4967 o-ring sealing it. Later machines had a pump housing with the fuel gallery stopped from going all the way through to the governor end so they do not have the plug with the second o-ring there. If that one is leaking you probably would see that the oil level in the injection pump was overfull and the oil diluted.

The seal on the ferrule between the filter tower and injection pump housing usually leaks directly into the engine crankcase without accumulating anywhere else first.

Note that the 8B4967 seals are round o-rings. The old ones will not look like that. They typically are triangular cross-section from being squashed for several decades or more, but they started out round.

There is no timing issue removing and replacing the injection pump and governor. The pump drive tang is offset in the accessory drive and mating pump camshaft so it cannot mate back together 180° out like pumps on many other brands. The same goes for removing the governor if required, nothing is going to fly out and be lost when it comes apart!

[quote="ccjersey"]Look in parts book for your serial number to see if there is a plug on the governor end of the fuel pump housing with a second 8B4967 o-ring sealing it. Later machines had a pump housing with the fuel gallery stopped from going all the way through to the governor end so they do not have the plug with the second o-ring there. If that one is leaking you probably would see that the oil level in the injection pump was overfull and the oil diluted.

The seal on the ferrule between the filter tower and injection pump housing usually leaks directly into the engine crankcase without accumulating anywhere else first.

Note that the 8B4967 seals are round o-rings. The old ones will not look like that. They typically are triangular cross-section from being squashed for several decades or more, but they started out round.

There is no timing issue removing and replacing the injection pump and governor. The pump drive tang is offset in the accessory drive and mating pump camshaft so it cannot mate back together 180° out like pumps on many other brands. The same goes for removing the governor if required, nothing is going to fly out and be lost when it comes apart![/quote]


Thank you very much!! Looks like I have a bit of a project ahead of me!!!