FUEL SYSTEM - N.29.Refit the bowl to the top cover and secure withthe centre bolt.10.Vent the fuel system as detailed on Page N.15.To Renew Later Type Filter Element1.Thoroughly clean the exterior of the filterassembly.Fig. N.2.Removing the Fuel Filter Bowl.(Earlier Type)3.Thoroughly clean the filter head and base.4.Inspect the sealing rings and renew if damagedin any way.5.Place the base squarely on the bottom of thenew filter element and offer up the elementsquarely to the filter head so that the top rim ofthe element locates centrally against the sealingring in the filter head.6.Hold in this position whilst the securing setscrewis located and screwed home.7.Bleed the fuel system as detailed on Page N.9.Fig. N.3.Removing Fuel Filter Element(Later Type)FUEL LIFT PUMPTesting the Pump in Position1.Disconnect the outlet pipe (lift pump to filter)leaving a free outlet from the pump.2.Rotate the engine. There should be a welldefined spurt of fuel from the outlet port onceevery two revolutions of the engine.Pressure Testing of Fuel Lift Pump in PositionFit a 0/10 lbf/in2 (0/0,7 kgf/cm2) - 0/70 kN/m2pressure gauge to the outlet of the pump. Ensure thatthere are no leaks at the connections between pump andgauge. Crank the engine for 10 seconds and note themaximum pressure on the gauge. If the pressurerecorded is less than 75% of the minimum productionstatic pressure shown below, then rectify the pump.Also observe the rate at which the pressure drops to halfthe maximum figure obtained when cranking hasceased. If less than 30 seconds, rectify the pump.Min. ProductionMin. Test PressureStatic Pressure(75% Min. Prod. Pres.)Ibf/in2kgf/cm2kN/m2Ibf/in2kgf/cm2kN/m24 bolt type60,42414.50,31312 bolt type2.750,191920,1414To Clean the Pump Chamber1.Remove the fuel lift pump cover and pulsatordiaphragm by unscrewing and removing thecover screw (see Fig. N.4).
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