Hi I have volvo L70C wheel loader and problem is diesel in oil. Few weeks ago i ride it on road and it started to give me warning lights concerning oil pressure. Then i noticed that there was oil in diesel and capacity was well above oil stick line. I drain all the engine oils and put new oil in. Chek the oil stick and it was on the line. Now i have same situation after only few hours of use. What could cause this to happen. i use same brand oil every time.
Lift pump on the side of the injection pump or the pump itself. Depending on the hours, probably time to have the pump overhauled.