Primary and Secondary Fuel Filter

1. 

   
   H119925-UN-02NOV16

   Tier 2/Stage II and Tier 3/Stage IIIA (Style A / Style B)

   
   H119926-UN-02NOV16

   Final Tier 4/Stage IV (Style A / Style B)

   A - Primary Fuel Filter

   B - Secondary Fuel Filter

   High-pressure fluid remaining in fuel lines can cause serious injury. Before disconnecting fuel lines, sensors, or any other components between the high-pressure fuel pump and nozzles on engines with High Pressure Common Rail (HPCR) fuel system, wait a minimum of 15 minutes after engine is stopped.

   Shut OFF engine, set park brake and remove key before performing maintenance work on the fuel filter.

   Primary Fuel Filter:

   1. Close fuel tank shutoff valve.

   2. Remove and replace primary fuel filter (A) when performance decline is noticed or diagnostic trouble code is generated.

   3. Disconnect water sensor (if equipped)

   4. Remove fuel from the filter and discard.

   5. Install replacement primary fuel filter.

   6. Open fuel tank shutoff valve, and turn key switch ON to prime the fuel system. See Maintenance—As Required (Engine Fluids and Filters) section for further information.

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2. Secondary Fuel Filter:

   1. Close fuel tank shutoff valve.

   2. Remove and replace secondary fuel filter (B) when performance decline is noticed or diagnostic trouble code is generated.

   3. Remove fuel from the filter and discard.

   4. Install replacement secondary fuel filter.

   5. Open fuel tank shutoff valve, and turn key switch ON to prime the fuel system. See Maintenance—As Required (Engine Fluids and Filters) section for further information.