47–01 Fuel Filter Replacement
Refer to the engine manufacturer’s service manual
for removal and installation procedures.
47–02 Fuel Separator Sight
Bowl Cleaning and
Element Replacement
ConMet Fuel Separator Sight
Bowl Cleaning
The only maintenance necessary on ConMet fuel
separators is to clean the sight bowl, if equipped.
See Fig. 1.
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 the fuel separator.
2. Unscrew the sight bowl from the fuel separator.
3. Wipe the sight bowl clean using a soft cloth.
4. Lubricate the gasket with a film of oil, and rein-
stall it on the sight bowl. If the gasket appears
dry-rotted or damaged, replace the gasket.
5. Lightly lubricate the threads on the sight bowl
with oil, then thread the sight bowl into the bot-
tom of the fuel separator.
6. Hand-tighten until the gasket is in full contact
with the fuel separator, then tighten an additional
1/4 to 1/3 turn.
7. Check that the drain valve is tightened and
closed.
8. Prime the fuel separator.
8.1 Remove the vacuum breaker fitting and
fill the unit with diesel fuel.
8.2 Replace and close the vacuum breaker
fitting when the unit is full of fuel.
08/25/95
f470146
10
9
8
7
6
5
4
3
3
2
1
1. Vacuum Breaker/Drain Valve
2. Reducer Bushing
3. Mounting Brackets
4. O-Ring (when equipped with heater)
5. Stainless Steel V-Clamp (when equipped with
heater)
6. Heater Assembly
7. Gasket
8. Sight Bowl Heater Rod
9. Sight Bowl Assembly
10. Vacuum Breaker/Drain Valve
Fig. 1, ConMet Fuel Separator
Fuel 47
Century Class Trucks Maintenance Manual, April 2005 47/1
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