PERSISTENT TURBO BLOWING ON MF 480 XTRA.

[Snobdds]

You might have too much blow by on the rings and it's putting too much back pressure through the turbo. Then it pushing the oil, through the feed tube, back into the crankcase and starving the thrust bearings of any oil. Take off your oil cap while running and see if will push your hand off the fill when covered.

 

[scrowoash]

You might have too much blow by on the rings and it's putting too much back pressure through the turbo. Then it pushing the oil, through the feed tube, back into the crankcase and starving the thrust bearings of any oil. Take off your oil cap while running and see if will push your hand off the fill when covered.

That is interesting! i never thought maybe the blow by could be a culprit. i will test with my hand as you have suggested and advise what i find. Does anyone have some info on these tractors such as:
 OIL PRESSURE IN PSI.
 BOOST PRESSURE IN PSI.
 MINIMUM ALLOWABLE AMOUNT OF BACK PRESSURE IN RETURN OIL LINE .
 PRESSURE IN TURBO/INTERCOOLER/INLET MANIFOLD AT VARIOUS ENGINE SPEEDS.

Thanks to all again for your valuable answers!