MAINTENANCE/SERVICE
Diesel Engine: Fuel System
FUEL
SYSTEM
AIR
REMOVAL
- DIESEL ENGINE
Controlled venting
of
air is provided
at
the
injection
pump
through the fuel drain manifold.
Small amounts
of
air introduced
by
changing filters
or
injection
pump
supply
line will
be
vented
automatically,
if
the
fuel filter is changed In
accordance
with instructions. (See "Fuel Filters".)
However, manual venting ("bleeding") will
be
required
if:
1.
Th
e fuel filter is
not
filled prior
to
installation.
2. Injection
pump
is replaced.
3. High-pressure fuel lines are replaced.
4. Engine is run until fuel
tank
is
empty
.
To
bleed
LOW
pressure lines
and
fuel filters:
1. Loosen the bleed screw (A) located
at
the
outlet
fitting
from
the fuel filter housing.
2. Operate the hand lever (8)
on
the lift
pump
until
clear fuel with
no
air
bubbles flows
from
around
the
bleed screw.
3.
Tighten
the
bleed screw (A).
To
bleed
Luca~V
injection
pump
:
(Naturally
Aspirated Diesel)
1. Turn key
in ig
nit
ion
switch
to
RUN position.
(First position clockwise after OFF.)
A
WARNING
:
It
is
necessary
to
have
the
ignition
switch
in
the
RUN
position
for
this procedure.
Be
sure everyone
in
the
area
is
aware
that
the
machine
is
being
serviced. Lock the
cab
door
and
take
the
key
to
prevent unexpected start-up.
2. Loosen bleed screws
(C)
and (D)
at
the
injection
pump
.
3. Operate
the
hand lever (B)
on
the
lift
pump
until
clear fuel with
no
air
bubbles flows from around
the
bleed screws.
4. Tighten bleed screws
(C)
and (D).
5. Turn ignition switch
OFF
and remove
key
.
NOTE: Manual bleeding
of
the Bosch injection
pump
used
on
Turbocharged Diesels is
not
possible.
72
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BLEEDING LOW PRESSURE LINES
AND FILTERS
BLEEDING INJECTION PUMP
NATURALLY ASPIRATED DIESEL
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