SERVICE MANUALROBERT BOSCH MODEL MW INJECTION PUMPSection 11Figure 42. - Fuel Inlet Restriction Test at Supply Inlet2.Install a vacuum gauge having a range of 0-50kPa (0-15 in. Hg).3.The restriction measured at full load and rated speedshould be no more than 20 kPa (6 in. Hg.).4.If low fuel pressure is evident and not caused byeither a transfer pump pressure or fuel inletrestriction problem, the injection nozzles should beremoved and checked for proper opening pressureor plugged orifices.NOTE: Plugged orifices indicate foreign material inthe nozzles.CGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 27
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