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Maintenance and careParallel fuel filterChanging fuel filterOnly when engine is switched offD Loosen filter cartridge by means of tapewrench, unscrew it by hand and take itoffD Moisten the seals on the new filter cartridgewith fuelD Screw on the filter cartridges andtighten them vigorously by handD Bleed fuel systemD Check filter for leaksCaution:Used fuel filters are classed asdangerous waste and must be disposedof accordingly.Change-over fuel filterWhere the changeover-type filter isinstalled, the servicing procedure is for thefilter side requiring to be shut off with theengine running. During continuous operation,the selector lever should be placedin a position where both filter halves are inoperation.Caution:Do not leave selector lever in anyintermediate position because thiswould be liable to interfere withfuel supply. If in doubt stop the engineto change the fuel filter.Continuous operation(both filter halvesin operation)Right-hand filtercut outLeft-hand filtercut out54