freightliner Argosy COE Maintenance Manual page 119

47
IMPORTANT: The fitting must be air-tight
and the valve closed.
Racor Fuel Separator Element
Replacement
The only service necessary on Racor fuel separators
is to replace the filter element.
Racor 490
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, pos-
sibly resulting in personal injury or property dam-
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain off some fuel by loosening the vent plug
and opening the drain valve.
2. Disconnect the water sensor and heater connec-
tions, if equipped.
3. Remove the element and bowl, together, by turn-
ing counterclockwise.
4. Remove the bowl from the element, and clean
the O-ring.
5. Apply a coating of clean fuel or motor oil to the
new O-ring and element seal.
6. Spin the bowl onto the new element, then spin
them both onto the filter head snugly, by hand
only.
IMPORTANT: Do not use tools to tighten.
7. Connect the water sensor and heater connec-
tors, if equipped.
8. Prime the fuel separator.
8.1 Loosen the vent plug. Then operate the
primer pump until the fuel purges at the
vent plug. See
8.2 Close the vent plug.
9. Start the engine and check for fuel leaks.
10. Shut down the engine and correct any fuel leaks.
47/2
Fig. 2.
1
11
10
9
8
06/25/97
1. Beige Mounting Head
2. Fuel Primer Pump
3. Metal Vent Plug
4. Bowl O-Ring
5. Bowl Bevel-Cut
Gasket
6. Bowl Probe Plug
Fig. 2, Racor 490 Fuel Separator
Racor 690
WARNING
Diesel fuel is flammable and can ignite if exposed
to an open flame, intense heat, or other ignition
source. Do not drain fuel near, or expose fuel
vapor to open flame or intense heat. Exposure to
open flame or intense heat could start a fire, pos-
sibly resulting in personal injury or property dam-
age. When working on a fuel system, have a fire
extinguisher within easy reach.
1. Drain off some fuel by loosening the vent plug
and opening the drain valve.
2. Disconnect the water sensor and heater connec-
tions, if equipped.
3. Remove the element and bowl, together, by turn-
ing counterclockwise.
Century Class Trucks Maintenance Manual, April 2005
Fuel
2
3
4
5
6
7
f470147
7. Water Sensor Probe
8. Heater Connector
9. Bowl Drain Valve
Assembly
10. Bowl with Drain and
Water Sensor
11. Service Element