HOW-TO SECTION NOTICE: 6. Clean the bowl and the O-ring seal. Never use the starting motor and fuel pump to prime the fuel filters. Prolonged used of both to prime the fuel system can result in damage to the starter, fuel pump and injector. 7. Apply a light coating or clean fuel or grease to the O-ring seal, thread the bowl onto the new filter and tighten by hand . Replace Fuel/Water Separator Element NOTICE: To avoid damaging the bowl or the filter, do not use tools when tightening. If an optional primary filter/water separator is installed, replace the element as follows: 1. Shut down the engine and allow it to cool. 8.
Apply a light coating of clean fuel oil or grease to the new O-ring seal on the top of the filter. Thread the filter and bowl assembly onto the filter head and tighten by hand until snug. 2. With the engine at ambient temperature and cool to the touch, place a suitable container under the filter. 3. If a fuel shutoff valve is installed on the discharge side of the fuel/water separator, turn the handle on the shutoff valve to the closed position (perpendicular to the valve). 9. To eliminate air from the filter, operate the primer pump on the filter head (if equipped) until the fuel purges at the filter assembly. 10. Start the engine and check for leaks. Shut down the engine.
Correct any leaks with the engine off. 4. Drain off some fuel by opening the drain valve. 5. Using a strap wrench, remove the element and bowl together, then remove the bowl from the element. The filter and bowl have right-hand threads, so turn counter-clockwise to remove. 84 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION