
NOTE: As a safety precaution, place a small plastic trash bag containing a few cloth rags
around and under the secondary filterto catch any fuel that may
spill from within the filter when
it
is
removed.
Also note that when working the manual priming lever on the fuel
lift pump, move the lever up
and
down
using long, even strokes. DO NOT operate the lever using rapid jerks.
In some rare instances, the fuel lift pump may be at
or
near its internal maximum pump stroke.
In this situation, no pumping action will be accomplished using the external manual priming
lever.
In this case, turn the engine over one
or
two
turns (do not attempt
to
start the engine)
to
reposition the pump's internal pumping lever. Now attempt
to
bleed the fuel system using
the manual priming lever.
Once the fuel system is bled, which
is
indicated
by
a flow
of
bUbble-free fuel from bleed point #
1,
retighten
either the banjo bolt
or
the plug and proceed
to
point #
2.
3.
Using either a 5/16" box wrench
or
a 1/4" drive 5/16" socket wrench, open the 5/16" # 2 bleed screw,
lo-
cated on the side
of
the fuel injection pump, one-half to one turn only.
DO
NOT
remove this special bleed
screw.
Once again move the manual priming lever up and
down
to
purge all
of
the air from this area of
the fuel
Injection pump. When the fuel flows bubble-free from the
#2
bleed screw, retighten the bleed
screw and proceed
to
point #
3.
Refer
to
the illustration below.
Bleedscrew
(1t1)
_~·--'.:::::t~l,
Fuel
Supply
(IN)
Mechanical
Lift
Pump
High pressure Injectors
,...,....--
Return
Fuel·
To_Fuel
Ta~~
81eedscrew
(#1)
Fuel
Line
(IN)
if,§~i:F;:::~~~\
Sleedscrew
(#3)
81eedscrew
(#2)
Fuel
Injection Pump
Fuel System
33
Westerbeke Diesel
Engines
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