Replacement of the Emergency Filter , DAVCO Fuel/Water Separator
If the filter cover on the DAVCO fuel/water separator is broken, it will not be possible to operate the vehicle. A standard spin-on filter will correct this problem.
Refer to the DAVCO website (www.davcotec.com)for additional information.
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 ignition 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.
- Shut down the engine and set the parking brake. Chock the tires.
- Put a clean receptacle under the fuel/water separator and attach a piece of hose to the drain valve, to direct fuel into the receptacle.
- Remove the vent cap (see Fig., Item
4) and open the drain valve (see Fig., Item
1). Drain the fuel to just below the collar level, then close the
drain valve.
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Drain Valve
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Lower Housing
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Clear Cover
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Vent Cap
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Collar
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Inlet Port/Check Valve
Fig. 1, DAVCO Fuel/Water Separator (Fuel Pro 382 shown)
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- Using a DAVCO collar wrench (see Fig.), remove the
clear cover and collar.
Fig. 2, DAVCO Collar Wrench
- Remove the filter and dispose of it in an environmentally acceptable manner.
- Clean all threads and sealing surfaces very thoroughly. Even a small amount of dirt will prevent the fuel/water separator from sealing, and an air leak will result.
- Ensure that the drain valve is closed.
- Remove the filter grommet from the filter stud, if equipped.
- Fill the housing to the top of the filter element with clean diesel fuel.
- Install a standard engine spin-on filter (part number FF105 or equivalent) on the filter stud.
- Install the cover O-ring, clear cover, and the collar. Simultaneously apply downward pressure to the top of the clear cover until it is seated on the body of the lower housing and hand tighten the collar until it no longer spins freely. Using the collar wrench, tighten the cover 18 lbf·ft (24 N·m). This is equivalent to rotating the collar clockwise two or three additional ribs, depending on the specific filter model.
- Install the O-ring in the vent cap, then install and hand-tighten the vent cap on the fuel/water separator.
- Start the engine. When the lubricating oil reaches its normal operating pressure, increase engine speed to high idle for one to two minutes to purge air from the system.
Important: When draining fluid from a fuel/water separator, drain the fluid into an appropriate container, and dispose of it properly. Many jurisdictions now issue fines for draining fuel/water separators onto the ground.
Note: The drain valve on the Fuel Pro 382 has a 1/2-inch (12.7-mm) opening; use a hose with a 1/2-inch pipe thread to fit correctly. Open the drain valve by turning it one-quarter revolution.
Note: Broken vent cap and collar warranty claims will not be accepted if any tool other than a DAVCO collar wrench, p/n 380134, 382002, or 232007, is used for removal. During installation, the vent cap is to be hand-tightened only , not tightened with a wrench.