New Holland TV145 Repair Manual page 48

SECTION 10 – ENGINE – CHAPTER 1
CRANKCASE BREATHER
All engines feature a Closed Crankcase Ventilation
System which is specifically designed to reduce
emmisions. Crankcase blow–by is produced when
the combustion gases, under high pressure, become
contaminated with oil droplets when blown past the
piston rings into the crankcase. The breather system
filters the blow–by gas and channels it into the air
intake system. The oil droplets are collected in the
breather and then returned to the engine oil pan.
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