﻿GET_GEVOMechL2_02_01_01_74 - ANIMATION Screen
1
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When the filter elements are changed or the oil filter housing is replaced, a filter drain back valve can be opened to drain the oil from the filter tank back to the engine crankcase. 

2
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Opening a vent and sampling valve or quick-disconnect on either the inlet pipe to the oil filter housing or on the filter housing door allows air to enter the tank as the oil drains, thus reducing the time to drain the filter tank. 

3
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<b>Note: </b>Do not use pressurized air to "force purge" oil from the system. 

4
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A pressure relief valve within the pump prevents an overpressure condition by routing the excess pressure back to the engine crankcase, which could introduce water or other contaminants into the lubricating oil system.
