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4020 diesel leaking into oil

R

Riverdog77

New User
Hey guys new to posting on this site. Im sure someone has answered this before but I need HELP. I have a 1964 4020 that we bought new. It is old and well used. Engine fires right up and runs without so much as a hiccup. My 15 year old loves driving this tractor more than anything else we own. The problem is diesel ( I believe ) is getting into the oil and raising the level after only a day of sitting up. I have changed the fuel pump and replaced the fuel injector pump. just changed the oil and filter again and it is still leaking from somewhere. It is well above safe mark on dipstick. I don't know if it could possibly be hydraulic fluid? it is not water. Any help or suggestions would be appreciated. Thanks!
 
The only places to get fuel in the oil is the transfer pump,or the seals on the injector pump. Did you install a rebuilt injection pump or a salvage yard take off? No way hydraulic oil can get in the crankcase.
 
Start with the transfer pump in side of engine,my 4010 had 1 leak,got new 1 at auto parts store,4 days later it was leaking. Went to the friendly john deere dealer ,was shocked 1 dollar less than auto parts store
 
I may put another new transfer pump on there.

Just changed it last week.
The injector pump was rebuilt. put it on there still had leaking problem. Took it back off had the guys check it and make sure something hadn't gone wrong. they said it checked out fine. So I put it back on and changed the transfer pump. And here we are. still leaking somewhere.
 
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