SERVICE MANUAL
ROBERT BOSCH MODEL MW INJECTION PUMP
Section 11
Figure 42. - Fuel Inlet Restriction Test at Supply Inlet
2.
Install a vacuum gauge having a range of 0-50
kPa (0-15 in. Hg).
3.
The restriction measured at full load and rated speed
should be no more than 20 kPa (6 in. Hg.).
4.
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
the nozzles.
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 27
