SPRING-VALVE 0L0646 - Caterpillar

Illustration 1 g02849004
(1) Crankcase breather The crankcase breathers are located on the left and right side, on top of the engine near the front. The crankcase breather helps to prevent a buildup of pressure in the crankcase. Some of the oil from the fumes that are produced in the crankcase is collected in the breather elements. The fumes are exhausted into the atmosphere.If the crankcase breather is not maintained on a regular basis, the crankcase breather will become plugged. A plugged crankcase breather will cause excessive crankcase pressure that may cause crankshaft seal leakage. The breather elements may be cleaned.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Dealer Service Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.