What is the process of removing fuel oil filter for cleaning during main engine running

• Fuel oil system uses duplex type of filters.
• only one filter is used at a time while other kept clean or stand by.
• At regular intervals the filters are cleaned or when there is drop in pressure.
• To clean the filter, we need to changeover other filter which is cleaned.
• Open the purge cock of the filter that in use and ensure that oil flows through the filter.
• Now open the purge cock of the which is not in use.
• Open the cover after the oil stops flowing and take out the filter elements.
• We need to be careful when we use heavy fuel oil, as it is in high temperature.
• The element of the filter is made up of wire gauze.
• Wire gauze size depends on rate of filtration in microns, it varies between 5 microns to 35 microns.
• we should clean the element with kerosene and compressed air.
• Place the filter element back with the cover.
• Change it over slowly and purge the air from the filter housing.