pressure on the outlet side of the pump becomes excessive due to a
clogged filter or fuel line.
A pressure of approximately 65 to 75
psi opens the relief valve allowing fuel to return to the suction
side through a passage in the pump body. The fuel pump mounts on the
flywheel housing and the fuel pump drives its gear at approximately
twice engine speed.
Figure 14.
Fuel Pump.
CAUTION
Construction of the fuel filter and strainer is
the same except for elements. Do not interchange
filter and strainer elements or engine damage
will result.
s. The Fuel Filter and Fuel Strainer (Fig. 15). This engine uses
a replaceable element fuel strainer and fuel filter to ensure the
fuel injectors receive clean fuel.
The strainer removes the large
particles and the filter removes the very small foreign particles
that may be in the fuel. The strainer and filter are essentially the
same in construction and operation.
19
OD1713
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