Weifang 495 - Maintenance of Fuel System

out rapidly.
C. It is forbidden to flush tIle paper element with oil. The dust
on the outside surface can be brushed off tenderly with a soft
brush as shown ill Fig. 23 or blown away by compressed air from
the inside outward.
· If the element is found broken or dust has entered into the in-
nerspace ,it tnustbe replaced. When installing a new element, pay
special attention': to its ends' for air tightness.
Fig. 23 Remove' the dust on the outer surface of
the elemellt with a soft brush.
(2)Maintenance of Fu'el System
The engine's power 'output and economics in operation is di-
rectly affected by the working condition of its fuel system. There-
fore, the fuel system should be carefully and reglliarly maintained
according to the service manual specified. The stipulated fuel
should be used to enSl.lre the fuel system working satisfactori1y,
Before being filled up tile fuel tank of the engine, the fuel should
be settled at least for 48 hours and filtered with doubl~ layers of
silkfabric during its filling. It ShOl11d be noted that the precise ele-
ments (plunger "delivery va.lve and nozzle assemblies) will be worn
out early or get stuck if the fuel having not been settled or having
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