140G 13w fule in oil

[younggun07]

i have a 140g grader has a 3306 engine ,it has had a full out of chasse rebuild only 200h ish ago and i done oil test on it from 71h since i got it back from rebuild and it has fule in oil, tested it at 71h,got a C from cats lab,i changed the oil so i new for sure the oil was not contaminated then tested at 40h on new oil, got a B, then tested again at 116h, got a C again, were the work got done was not my choice and is pretty clear the wont warrant there work have had other issues soon as it got off the truck, so where could the fuel be getting into the oil and what can i to stop it ,id like to try sort it out myself if can,cant be spending a **** load more, the bill i was stuck with was way to much , the grader runs fine and blows no smoke , it does seem to be using oil though, 7liters in 116h . when the oil lvl should be rising with fule getting into oil,

 

[David P (CAT)]

its possible that the fuel is entering the oil system through the transferpump.
it should be on the side of the injection pump.
do you have access to a UV dye testing kit?
but burning oil at a rate of 7 liters in 100hrs for a rebuild engine is concerning to say the least

 

[younggun07]

i possibly could get one for a mate,what would i do with it?, would it be simple as replacing the transfer pump? yes its very concerning ,but id like to get the fuel issue sorted out first ,the injection pump was all meant to be rebuilt all so

 

[younggun07]

i possibly could get one for a mate,what would i do with it?, would it be simple as replacing the transfer pump? yes its very concerning ,but id like to get the fuel issue sorted out first ,the injection pump was all meant to be rebuilt all so

 

[Cliffy]

The transfer pump just bolts to the side of injection pump with 4 bolts. Maybe contact the company that rebuilt the injection pump. They will tell you if the lift pump was rebuilt or replaced or if they have seal kits.
New lift pump is about $1000 from cat.

 

[dmitry_bulldozerman]

Hello everyone. In my opinion, in the 3306 engine, fuel can get into the oil through the injection pump. Specifically through the injection pump, not through the transfer pump.
Because the low fuel pressure in the transfer pump is lower than the oil pressure.