SUPPORT-FAN 2003905 - Caterpillar

Engine: C6.6 (S/N: 6661689-1689,1747-1747,2026-2026,2028-2028,2031-2032,2928-2929,2974-2974,3063-3063,3142-3144,3190-3192,6155-6157)Introduction
There have been isolated instances of issues with accelerated wear on the electronic unit injectors. This Special Instruction, "New Secondary Fuel Filter" will prevent the issue.Refer to Special Instruction, KENR6938, "High Leakoff of the Electronic Unit Injector" in order to determine the condition of the electronic unit injectors. After the Special Instruction, KENR6938, "High Leakoff of the Electronic Unit Injector" has been completed, carry out this Special Instruction, "New Secondary Fuel Filter".Required Parts
Table 1
Required Parts (Engines with a 17 plate oil cooler)    
Part Number     Description     Qty    
319-7345     Bracket     1    
311-1737     Bracket As     1    
319-7348     Bracket As     1    
6I-0593     Bolt     2    
308-7480     Fuel Filter As     1    
6I-0594     Bolt     2    
311-1675     Tube     1    
277-6165     Fuel Connection     1    
311-1293     Tube     1    
311-1721     Tube     1    
234-3063     Clip     1    
319-7344     Protective Cover Assembly     1    
278-4138     Fuel System Protection Gp     1    Removal Procedure
Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training. Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, General Hazard Information and High Pressure Fuel Lines for safety information. Refer to System Operation, Testing and Adjusting, Cleanliness of Fuel System Components for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.
Illustration 1 g01624728
Typical example
Remove the protective cover (1) .
Remove the primary fuel filter. Refer to Disassembly and Assembly, "Fuel Priming Pump - Remove and Install" for the correct procedure.
Illustration 2 g01624742
Typical example
Remove tube assemblies (2), (3) and (4) from the engine.
Remove the old canister for the secondary fuel filter. Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.
Remove the existing secondary fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove and Install (Secondary Fuel Filter)" for the correct procedure.Installation Procedure
Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training. Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, General Hazard Information and High Pressure Fuel Lines for safety information. Refer to System Operation, Testing and Adjusting, Cleanliness of Fuel System Components for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.
Illustration 3 g01625029
Typical example
Install two new setscrews (5)