DAVCO Fuel Pro® 382 and 482
NOTE: In the event of an emergency, when the
filter needs replacement but a DAVCO filter is
not available, a temporary filter can be used;
see Chapter 24 of the 108SD and 114SD
Driver’s Manual for instructions.
WARNING
Fluid circulated through the fuel/water separator
to heat the fuel may be diesel fuel returned from
the engine, or engine coolant. Drain the fuel/water
separator only when the engine and fluids have
cooled. Draining it when the engine is hot could
cause severe personal injury due to scalding.
If returning fuel is released into the atmosphere,
its vapors can ignite in the presence of any igni-
tion source. Do not expose the fuel to, or work
with the fuel system near, open flame or intense
heat. To do so could cause fire, possibly resulting
in serious personal injury or property damage.
The filter element should be changed only when the
fuel level has reached the top of the filter element.
There is no significant restriction to fuel flow until the
element is completely clogged.
1. Shut down the engine, apply the parking brake,
and chock the tires.
2. Check the fuel level in the fuel filter. Replace the
fuel/water separator element only when the filter
element is completely covered. If the fuel level
has reached the top of the filter element, follow
the procedure below to replace the element.
3. Put a clean receptacle under the fuel/water sepa-
rator and attach a piece of hose to the drain
valve, to direct fuel into the receptacle.
The drain valve has a 1/2-inch (12.7-mm) pipe;
use a hose with a 1/2-inch pipe thread to fit cor-
rectly.
4. Remove the vent cap (
Fig. 2, Item 10) and open
the drain valve (Fig. 2, Item 1) to drain the fuel
completely, then close the drain valve.
5. Using a DAVCO Collar Wrench (
Fig. 3), remove
the clear cover and collar.
NOTE: Broken vent cap and collar warranty
claims will not be accepted if any tool other than
a DAVCO Collar Wrench is used for removal.
01/27/2011
f470566
2
3
4
3
5
6
7
9
8
1
1. Primer Pump
2. Mounting Head
3. O-Ring
4. Filter Element
5. Sight Bowl
6. Water-in-Fuel Sensor
7. Wiring Harness,
Water-in-Fuel Sensor
8. Wiring Harness,
Heater
9. Drain Plug
Fig. 1, Alliance Fuel/Water Separator Assembly
Fuel47
108SD and 114SD Maintenance Manual, May 201847/2
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