Replacement of the CNG Low-Pressure Fuel Filter

wv mm 47.05.000
Warning: Compressed natural gas is highly flammable. See the safety precautions listed, see CNG General Information of the Walk-In Van Chassis Operator's Manual or of the Walk-In Van Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer. Failure to observe these precautions could lead to the ignition of the natural gas, which could cause severe bodily harm, or death, or property damage.

The low-pressure fuel filter is located inside of the left-hand frame rail, near the center of the fuel tank.

Turn the valve counterclockwise to close the filter drain.

  1. Shut off the fuel supply at the tanks.
  2. Vent the fuel supply system.
  3. After the system has been vented, remove the filter bowl. See Fig.. Using a 26-mm wrench, remove the bowl nut. Then remove the bowl, the element retainer, and the filter element.

    1. Fuel Filter Head

    2. Filter Element

    3. Element Retainer

    4. Filter Bowl

    5. Bowl Nut

    Fig. 1, CNG Low-Pressure Fuel Filter Assembly

    4. Note: Be sure that the O-ring is positioned properly inside of the filter head.

  4. Install the new element, the element retainer, the bowl, and the bowl nut.
  5. Turn the fuel supply on at the tanks.
Note:
Parent topic: Fuel
Document Number: 0000117164
Manual Publication Date: 2024-05-14
Topic Publication Date: 2024-11-19