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Introduction
This Special Instruction is used for installing the fuel filtration kits on migrated Commercial Engines.Parts Information
Table 1
C9.3 Primary Fuel Filter (24 VDC) with Secondary Filter Check Valve    
Part Number     Description     Quantity    
238-5081     O-Ring Seal     4    
228-7089     O-Ring Seal     1    
434-3158     Fuel Priming Pump and Primary Filter Gp     1    
421-5682     Check Valve Gp     1    
335-3976     Elbow As     1    
Table 2
C13, C15, and C18 Primary Fuel Filter (24 VDC) with Secondary Filter    
Part Number     Description     Quantity    
238-5081     O-Ring Seal     4    
228-7089     O-Ring Seal     1    
434-3158     Fuel Priming Pump and Primary Filter Gp     1    
416-1225     Fuel Filter     2    
Table 3
C18 Primary Fuel Filter (24 VDC) with Secondary Filter and without Cat Regeneration System (CRS)    
Part Number     Description     Quantity    
238-5081     O-Ring Seal     4    
424-3573     Fuel Priming Pump and Primary Filter Gp     1    
416-1225     Fuel Filter     2    Conversion Procedure
Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately.
Turn the fuel supply to the OFF position.
Remove the fuel filter. Refer to Operation and Maintenance Manual, "Fuel System Primary Filter (Water Separator) Element - Replace".
Replace the existing secondary and tertiary fuel filters with the two new 416-1225 Fuel Filters .Note: This Step is not necessary for C9.3 Engines.Replacing the Primary Fuel Filter Base on Engines with the Cat Regeneration System (CRS)
Disconnect both the supply and return fuel lines from the fuel filter base. Disconnect wiring harness assemblies and remove the connecting hardware.
Remove bolts (2) that secure the existing filter base and remove the filter base.
Remove the existing plugs and connectors from the existing 360-1693 Fuel Priming Pump and Primary Filter Gp .
Illustration 1 g03744348
(1) Four 238-5081 O-Ring Seals (2) Three bolts securing the fuel filter base (3) 228-7089 O-Ring Seal
Install the removed plugs and connectors into the new 434-3158 Fuel Priming Pump and Primary Filter Gp using O-ring seals (1) and O-ring seal (3) as shown in Illustration 1.Replacing the Primary Fuel Filter Base on Engines without CRS
Disconnect the hose assemblies that carry fuel to and from the fuel filter base. Disconnect harness assemblies and remove the connecting hardware.
Remove bolts (2) that secure the existing filter base and remove the filter base.
Remove the existing plugs and connectors from the existing 213-4740 Fuel Priming Pump and Water Separator .
Illustration 2 g03744356
(1) Four 238-5081 O-Ring Seals (2) Three bolts securing the fuel filter base
Install the removed plugs and connectors into the 424-3573 Fuel Priming Pump and Water Separator , in the same positions using O-ring seals (1) .Installing the Check Valve on the Secondary Fuel Filter Base of C9.3 Engines
Illustration 3 g03744360
(1) 319-6225 Elbow As
Disconnect the fuel line from elbow (1) .
Remove elbow (1) from the secondary fuel filter base.
Illustration 4 g03744364
(2) 335-3976 Elbow As (3) 421-5682 Check Valve Gp
Install elbow assembly (2) into the secondary fuel filter base.
Install check valve (3) into elbow assembly (2) .
Connect the existing fuel line to check valve (3) .