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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.
The
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
ignition
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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