4-23 FUEL SYSTEM AND AIR INTAKE - Continued
4-23.6 Main Engine Fuel Filter
This task covers
Shop Equipment, Automotive
Maintenance and Repair,
25010778 Filter Cartridge
Main Engine Shutdown (see para. 2-10)
RH Engine Cover Removed (see para. 4-12.11)
JP-4 is a highly volatile fuel. Extraordinary care must be taken when servicing components
that use this fuel. The truck shall be grounded to an approved grounding point if it contains
The main engine fuel filter is mounted on the front right hand of the engine.
Filter Cartridge Replacement
Unscrew the filter using a filter removal tool.
Remove from the engine and discard in a combustible waste area.
Fill a replacement filter cartridge about two-thirds full with clean fuel oil.
Coat the seal gasket lightly with clean fuel oil.
Install the cartridge and tighten it to one-half turn beyond gasket contact.
Start the engine and check for leaks. Tighten the filter as required.
Filter Cover Replacement
Carry out Filter Cartridge Replace steps 1 and 2.
Tag and remove fuel filter inlet and outlet hoses.
Remove both capscrews securing filter cover to engine block.