Tuesday, January 22, 2013

444J Loader Excessive Blow-by

This is a rarely seen problem but one that if you find can save you lots of hours in labor. A 444J Loader has a bad turbo. Leaks oil terribly out of the exhaust, upon removal and inspection of the turbo it is found that the turbine wheel and compressor wheel are fine, the only thing wrong with the turbo is that it blew seals. Put the new turbo on and it is now pushing oil out of the dipstick tube. After running compression tests on the engine, all the cylinders turn out to be in great shape. The problem is that on the crankcase vent tube there is a blockage. In our case it was a chunk of ice. When that ice is removed life goes back to normal. Like I said it is rarely seen but it will save you lots of man hours trying to find a ghost problem.

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