Every 500 Hours

1. CAUTION: 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 parking brake and remove key before performing maintenance work on fuel filter.

   
   CQ280398-UN-27AUG08

   
   H86842-UN-16FEB07

   
   H86843-UN-16FEB07

   A - Fuel Precleaner Filter

   B - Secondary Fuel Filter

   C - Primary Fuel Filter

   D - Fuel Tank Breather

   Fuel Precleaner Filter - Close fuel tank shut off valve. Remove fuel precleaner filter (A) and clean screen. Install fuel precleaner filter and open fuel tank shut off valve and allow bowl to fill (see Fuel Precleaner Filter Cleaning in Service Engine section.)

---




2. Secondary Fuel Filter - Replace secondary fuel filter (B) when performance decline is noticed or diagnostic trouble code is generated. Remove fuel from filter and discard. Install new secondary fuel filter (see Primary and Secondary Fuel Filter Replacing in Service Engine section.)

   Primary Fuel Filter - Replace primary fuel filter (C) when performance decline is noticed or diagnostic trouble code is generated. Disconnect water sensor from primary fuel filter. Remove fuel from filter and discard. Install new primary fuel filter and turn key switch ON to prime fuel system (see Primary and Secondary Fuel Filter Replacing in Service Engine section.)

3. Moisture Sensor - Clean out moisture sensor when operation in weedy, green crop or very small grain (canola). Fold down loading auger, and remove plunger to clean moisture sensor. Make sure that cell and area behind plunger (bottom of the cell) is clean.

4. Fuel Tank Breather - Remove and replace fuel tank breather (D).