Replacing Fuel Filter Elements

IMPORTANT: Replace fuel filter elements anytime audible alarm sounds and diagnostic trouble codes indicate plugged fuel filters (low fuel pressure). If no alarm sounds during the 12 month service interval, replace elements at that time, or after 500 hours operation, whichever comes first.

RXA0098950-UN-28AUG08

Fuel Filters

A - Primary Fuel Filter

B - Final Fuel Filter

C - Drain Valves

1. Thoroughly clean exterior of fuel filters and surrounding area.

2. Drain water and contaminants from primary fuel filter (A) into suitable container by opening drain valves (C) on bottom of filter.

3. Disconnect the water-in-fuel (WIF) sensor connector from primary filter.

   IMPORTANT: Always replace both filters at the same time.

4. Remove the final fuel filter (B) first, for clearance, using a suitable filter wrench. Then remove primary fuel filter (A) canister.

5. Remove primary fuel filter element and replace with new element.

   IMPORTANT: Do NOT prefill either fuel filter with fuel.

6. Remove packing for primary fuel filter canister and replace with new packing provided with filter element. Lubricate packing for primary fuel filter with fuel, and install canister onto base. Tighten 1/2 turn after packing contacts base.

7. Connect sensor.

8. Lubricate packing on new final fuel filter, and install filter onto base. Tighten 1/2 turn after packing contacts base.

9. IMPORTANT: Key must be turned to ON position for 60 seconds before starting engine to provide time to prefill fuel filters. Fuel system is self-bleeding.

   Turn key switch to ON position for 60 seconds to allow transfer pump to prefill fuel filters.

10. Turn key switch clockwise to START position, and run engine at fast idle for 2 minutes.