Replacement of the Emergency Filter, DAVCO

4700 d 24.05.000

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 web site for additional information,www.davcotec.com.

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.

  1. Shut down the engine, apply the parking brake, and chock the tires.
  2. 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.

    3. 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.

  3. Remove the vent cap (see Fig., Item 4) and open the drain valve (see Fig., Item 1) to drain the fuel to just below the collar level, then close the drain valve.

    1. Inlet Port/Check Valve

    2. Lower Housing

    3. Bypass Valve

    4. Filter Element

    5. Spring

    6. Cover O-Ring

    7. Clear Cover

    8. Vent Cap O-Ring

    9. Vent Cap

    10. Collar

    11. 120VAC Pre-Heater

    12. 12VDC Pre-Heater

    13. Drain Valve

    Fig. 1, DAVCO Fuel Pro 482

  4. Using a DAVCO collar wrench (see Fig.), remove the clear cover and collar.

    Fig. 2, DAVCO Collar Wrench

    5. Note: Broken vent cap and collar warranty claims will not be accepted if any tool other than a DAVCO collar wrench, p/n 380134 or 382002, is used for removal. During installation, the vent cap is to be hand-tightened only , not tightened with a wrench.

  5. Remove the filter and dispose of it in an environmentally acceptable manner.
  6. 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.
  7. Ensure that the drain valve is closed.
  8. Remove the filter grommet from the filter stud, if equipped.
  9. Fill the housing to the top of the filter element with clean diesel fuel.
  10. Install a standard fuel filter element on the filter stud. If a standard filter element is not available, install a spin-on fuel filter element (part number FF105 or equivalent).
  11. 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.
  12. Install and hand-tighten the vent cap O-ring and vent cap.
  13. 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.
Note:
Parent topic: In An Emergency
Document Number: 0000117998
Manual Publication Date: 2024-05-13
Topic Publication Date: 2024-05-16