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Replace Auxiliary Fuel Filter and Water
Separator—If Equipped
1. Ensure key switch is in the OFF position.
2. Open right engine service door to access auxiliary fuel
filter and water separator (1).
3. Thoroughly clean exterior of auxiliary fuel filter and
water separator assembly and surrounding area.
CAUTION: Fuel in filter may be under high
pressure. Escaping fuel under pressure can
penetrate the skin and cause serious injury.
Relieve pressure before removing filter.
NOTE: Drain waste into a container. Dispose
of waste properly.
4. Loosen drain valve (3) to relieve pressure and drain
contaminants from water separator bowl (2). Dispose
of waste properly. Close drain valve.
5. Rotate auxiliary fuel filter counterclockwise and
remove from mounting base. Remove water separator
bowl from auxiliary fuel filter. Dispose used fuel filter
properly.
6. Clean filter mounting base.
7. Clean and dry water separator bowl. Replace if
necessary.
8. Install water separator bowl to new auxiliary fuel filter.
IMPORTANT: DO NOT prefill fuel filters. Debris
in unfiltered fuel will damage fuel system
components.
Only lubricate filter seal with diesel fuel
before installing.
Check Air Intake Hoses
1. Check air intake hoses (1) for cracks. Replace as
necessary.
2. Check for loose connections and tighten clamps as
necessary.
1— Air Intake Hose
Maintenance—Every 500 Hours
1— Auxiliary Fuel Filter and
Water Separator
2— Water Separator Bowl
9. Install new auxiliary fuel filter onto mounting base.
Rotate filter housing clockwise by hand. Tighten
1/2—3/4 turn after seal contacts mounting base.
10. Prime fuel system and bleed air. See Bleed Fuel
System. (Section 4-1.)
11. Operate engine and check for leaks.
12. Tighten filter element and bowl only enough to stop
leaks.
3-8-4
Auxiliary Fuel Filter and Water Separator
3— Drain Valve
DB84312,00000E8 -19-29AUG12-1/1
Air Intake Hose
DB84312,00000E9 -19-27JAN12-1/1
092221
PN=170
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Table of Contents
Troubleshooting
