Fuel Filters—13.5 L Engine

1. Replace fuel filter elements anytime audible alarm sounds and diagnostic trouble codes indicate plugged fuel filters (low fuel pressure). If no alarm sounds replace filters after 500 hours operation

   Thoroughly clean exterior of fuel filter/water separator assembly and surrounding area.

2. 
   RXA0141938-UN-02JUN14

   Drain water and contaminants from primary filter into suitable container by opening drain valve (A) on bottom of separator.

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3. Dispose of drained material in accordance with local laws and ordinances.

4. Disconnect the water-in-fuel sensor connector (B) from primary filter.

5. Remove primary filter (C), secondary filter (D), and gaskets and discard.

6. Do NOT prefill either fuel filter with fuel.

   Lubricate gasket for primary fuel filter with fuel, and install canister onto base. Tighten 3/4 turn after packing contacts base.

7. Lubricate primary fuel filter water separator gasket with fuel and install onto filter canister. Tighten 3/4 of a full turn after gasket contacts the base.

8. Lubricate gasket for secondary fuel filter with fuel, and install filter onto base. Tighten 3/4 turn after packing contacts base.

9. Connect water-in-fuel separator sensor harness.

10. Key must be turned to ON position for 3 minutes before starting engine to provide time to prefill fuel filters. Fuel system is self-bleeding.

    Do not try to start engine until after 3 minute time elapses or an air lock in the fuel system may occur.

    Turn key switch to ON position for 3 minutes to allow transfer pump to prefill fuel filters.

11. Start engine and run high idle for 2 minutes.