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2008/05/19 Caterpillar


Improvements have been made to Remanufactured Fuel Injectors {1251, 1254, 1290, 1713}

Usage:

120H 124
Machine Engines:
  • 3114
  • 3116
  • 3126
    • Service Magazine, SEPD0935, 7 April 2008, "Improvements have been made to Remanufactured Fuel Injectors". Disregard this article. See the article that follows.

    Description of Change: Some issues with Mechanical Unit Injectors (MUI) have occurred on certain engines.

    Adaptable To: The part numbers for the affected remanufactured fuel injectors are listed in Table 1.

    Show/hide table
    Table 1
    Part Number    
    0R-8461 Fuel Injector Gp    
    0R-8463 Fuel Injector Gp    
    0R-8465 Fuel Injector Gp    
    0R-8467 Fuel Injector Gp    
    0R-8469 Fuel Injector Gp    
    0R-8471 Fuel Injector Gp    
    0R-8473 Fuel Injector Gp    
    0R-8475 Fuel Injector Gp    
    0R-8477 Fuel Injector Gp    
    0R-8479 Fuel Injector Gp    
    0R-8483 Fuel Injector Gp    
    0R-8633 Fuel Injector Gp    
    0R-8682 Fuel Injector Gp    
    0R-8684 Fuel Injector Gp    
    0R-8867 Fuel Injector Gp    
    The information below explains the solution to each one of the issues that was occurring with the Mechanical Unit Injectors (MUI).

    The remanufactured Mechanical Unit Injectors (MUI) are now shipped with the rack in the fuel OFF position in order to eliminate the need to move the fuel rack before installation into the cylinder head. The fuel rack on the Mechanical Unit Injectors (MUI) should not be moved without compressing the tappet spring.

    The issue of the dragging of the fuel rack on the cylinder head was caused by the process of remanufacturing the cones for the fuel injectors. The remanufactured cones were causing the rack to drag on the cylinder head sometimes. The process for remanufacturing the cones was improved in order to eliminate the fuel rack from dragging on the cylinder head.

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    Illustration 1g01503560

    The cones that are discolored are circled.

    (1) Area of discoloration

    The change in the process of remanufacturing the cones for the injectors has caused the cones to have some discoloration on the cone. The change in the appearance of the remanufactured cones is normal. The discoloration will not affect the performance of the fuel injectors. Illustration 1 shows the area of discoloration (1) on the injector cones.

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