FUEL
SYSTEM
AWARNING:
Shut
off
tho
fuel
valvo
at
tho
tank
whlln
SBtrlclng
tho
fU1I1
system.
Tako
calo
In
catching
any
fulll
that
may
spill.
00
NOT
allow
any
smoking,
opon
flamllS
01
athol
SOUICIIS
of
flIB
neal
tho
fuol
systllllJ
whon
SIll-
vtclng.
EnsUIB
proPIII
vontllatlon
oxists
whon
slIrvlclng
tho
fuol
system.
FUEL
FILTERS
The fuel injection pump and the fuel injectors are precisely
manufactured
and
they must receive clean diesel fuel, free
from water and dirt.
To
ensure this flow
of
clean fuel, the fuel
must pass through at least two fuel filters, a
fueVwater sepa-
rator and the engine's spin-on fuel filter. Visually inspect,
clean, and change these filters according to the maintenance
schedule
in
this manual.
I.
Shut fuel supply off.
2.
Loosen the fuel filter, turning counterclockwise with a
fil-
ter wrench.
3.
Using a rag, wipe clean the sealing face on the housing
bracket so the new filter can be seated properly.
4.
Lightly oil the sealing O-ring on the new filter.
To
rein-
stall, tum the filter assembly clockwise carefully until the
O-ring contacts the sealing surface
of
the housing bracket.
Tum
213
further with the filter wrench.
5.
Thrn on the fuel and start the engine. The normal preheat
function should quickly prime the system and the engine
should start.
NOTE:
The
cartridge contains fuel.
Take
Care
not
to
spill
it
during
disassembly.
Perfonn the PRIMING
THE
FUEL
'iYSTEM after
replacing
the
spin-on
filter.
TO
FUEL
PUMP
FUELFILnR
TO
INJECTION
PUMP
BLEED
SCREW
GASKET
20
FUEL
WATER
SEPARATOR
A primary fuel filter
of
the water separating type must
be
installed between the fuel tank and the engine
to
remove
water and other contaminants from the fuel before they can
be carried
to
the fuel system on the engine.
Most installers include a type
of
filter/water separator with
the installation package as they are aware
of
the problems
that contaminants in the fuel can cause.
A typical fuel filter/water separator is illustrated
in
this dia-
gram. TIris is the Raycor Model 500 MA. Keep
in
mind that
if
a water separator type filter is not installed between the
fuel supply tank and engine-mounted fuel system,
any
water
in the fuel will affect the fuel pump, engine filter, and injec-
tion equipment. The owner/operator is responsible for making
certain
the
fuel
reaching
the
engine's
injection
equipment
is
free
of
impurities.
TIris
process is accomplished
by
installing
and maintaining a proper filtration/separation system.
TO
ENGINE
FUEL
FILTER
WATER/SEPARATOR
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