SHEET AS 5477510 - Caterpillar

Illustration 1 g03041739
(1) Return to the air inlet system
(2) Base assembly
(3) Fumes from crankcase breather
(4) Canister (filter)
(5) Oil drain to crankcase
(6) Latches This engine is equipped with a Closed Crankcase Ventilation System (CCV) that is used for capturing fumes. Fumes from the crankcase exit the engine through the crankcase breather. The fumes from the crankcase are collected in the filter base. The engine oil is separated from the fumes from the crankcase in the filter base. The engine oil collects in the filter base and drains back to the crankcase through a drain line in the bottom of the filter base. The fumes from the crankcase are directed back into the air cleaner assembly in order to be consumed by the engine.Higher crankcase pressures will tend to create oil leaks. The CCV filter base has a service indicator that will indicate when the filter needs to be replaced. If the filter becomes plugged, the engine will not be able to relieve the crankcase pressure. The engine will then develop external oil leaks. For more information, refer to the OMM, "Closed Crankcase Ventilation (CCV) Fumes Disposal Filter - Replace".