New Secondary Fuel Filter{1261} Caterpillar

Engine:

C6.6 (S/N: 666756-756,760-761,763-763,768-768,774-774,776-776,779-779,782-782,784-786,830-830,834-834,837-837,839-842,864-864,866-868,914-917,987-987,990-991,993-994,996-996,1000-1000,1003-1003,1396-1396,2013-2017,2021-2022,2109-2109,2113-2113,2128-2128,2130-2130,2134-2134,2151-2151,2154-2154,2162-2163,2356-2356,2359-2360,2374-2374,2376-2377,2379-2379,2381-2381,2384-2385,2387-2387,2413-2413,2415-2416,2418-2418,2420-2420,2492-2492,2498-2498,2501-2502,2504-2505,2514-2514,2653-2655,2657-2657,2659-2661,2703-2703,2705-2705,2711-2711,2718-2723,2827-2827,2830-2830,2833-2834,2836-2838,2840-2841,2887-2888,2890-2896,2898-2898,2903-2903,2905-2906,2910-2910,2913-2914,2916-2916,2933-2935,2937-2937,2977-2979,2982-2982,3018-3019,3055-3056,3068-3068)

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" 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

Removal Procedure

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Illustration 1	g01618822
Typical example

1. Remove tube assemblies (1). Remove setscrew (3). Retain setscrew (3) .

2. Remove the old secondary fuel filter canister (5). Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.

3. Remove the existing secondary fuel filter base (4). Refer to Disassembly and Assembly, "Fuel Filter Base - Remove and Install (Secondary Fuel Filter)" for the correct procedure. Remove bracket (2). Retain bracket (2) and setscrews.

Installation Procedure

1. Remove paint around the paint shadow left by the original secondary fuel filter base. This is to ensure metal to metal contact all around the secondary fuel filter base.

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Illustration 2	g01618825
Typical example

2. Install bracket (3) to setscrews (2). Install setscrews (2) to new secondary fuel filter assembly (5) .

Note: Ensure that the new secondary fuel filter assembly (5) has an identification mark (A). The identification mark is a hole that has a depth of 3 mm (0.1181 inch).

3. Install new secondary fuel filter assembly (5). Tighten setscrews (2) to a torque of 22 N·m (16 lb ft).

4. Install tube assemblies (1). Install setscrew (4) to bracket on the tube assembly.

5. Prime the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime".

6. Check the fuel system for fuel leaks.