Had the injection pump on my 1937 RD4 rebuilt and it works just fine except that I'm getting diesel fuel into the injection pump lubricating oil.
Pulled the side plate off and while the engine was running Did NOT observe any diesel leaking from the pumps and Did NOT observe any fuel draining from the drain tube on the bottom of the pump.
Used new gaskets and seals when I installed it.
Is there another place where diesel can get into the injection besides the top R.H. corner where the diesel fuel enters from the filter housing ?
Would appreciate some suggestions before I start taking the pump off.
Ken Wise

