9 MAINTENANCE
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9.7 FUEL SYSTEM ____________________________________________________________
Water Separator (T4F/Stage 5 Engine Only)
If the water is not removed from the fuel, damage to the
fuel-injection system can occur. When the
WATER IN
FUEL
screen is shown on the LDU or every 100 hours,
drain the water from the water separator.
a
Stop the engine. Open the air vent at the top of
water separator.
b
Open the drain valve at the bottom of the water
separator and drain the water. Water will drain
before the fuel. When fuel drains from the valve,
close the valve.
c
Press and release the hand pump until air bubbles
at separator air vent stop and fuel starts to spill.
Close the vent. Clean any fuel that spills.
Fuel Filter
Replace the fuel filter every 400 hours.
a
Stop the engine.
b
Open the air valve at the top of the filter to release
system pressure.
c
Remove fuel filter cartridge. Clean any fuel that
spills.
d
Assemble new filter cartridge to the filter base.
Tighten the cartridge with your hand.
e
Bleed air from the fuel system.
How To Bleed The Air From The Fuel System
After water is drained from the fuel system, fuel filter cartridge is replaced or the fuel hoses are replaced, bleed the air
from the fuel system.
a
T4F/Stage 5 Engines:
Open the air vent at the top of the water separator. Press and release the hand pump until
air bubbles at separator air vent stop and fuel starts to spill. Close the vent. Clean any fuel that spills.
b
Open the air vent on the fuel filter. Turn the ignition switch to the RUN position, but do not start the engine.
Operate the fuel pump until air bubbles at filter vent stop and fuel starts to spill. Close the air vent. Clean any fuel
that spills.
c
Start the engine. The engine will remove any air remaining in the fuel hoses.
CAUTION
The Diesel fuel can damage your skin. Use gloves when you use Diesel fuel. If the fuel touches your skin, clean
the area immediately.
Discard used Diesel fuel as shown in local regulations.
Hand
Pump
Air
Vent
Water
Separator
Drain
Valve
Fuel
Pump
Fuel
Filter
Air
Vent
From
Tank
To
Engine
To
Engine
From
Tank
Fuel
Pump
Air
Vent
Fuel
Filter
Tier 4 Final & Stage Engine Fuel Routing
Tier 4 Interim Engine Fuel Routing
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