ROBERT BOSCH MODEL MW INJECTION PUMP
Figure 42. - Fuel Inlet Restriction Test at Supply Inlet
Install a vacuum gauge having a range of 0-50
kPa (0-15 in. Hg).
The restriction measured at full load and rated speed
should be no more than 20 kPa (6 in. Hg.).
If low fuel pressure is evident and not caused by
either a transfer pump pressure or fuel inlet
restriction problem, the injection nozzles should be
removed and checked for proper opening pressure
or plugged orifices.
NOTE: Plugged orifices indicate foreign material in
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