2014/10/09 Improved Cover Assembly for the Tractor Engine Oil/Fuel Filter Service Center Is Now Used on Certain 621K, 623K, and 627K Wheel Tractor-Scrapers {1806, 7261} Caterpillar


Improved Cover Assembly for the Tractor Engine Oil/Fuel Filter Service Center Is Now Used on Certain 621K, 623K, and 627K Wheel Tractor-Scrapers {1806, 7261}
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Wheel Tractor-Scraper:
621K (S/N: WTA1-UP; WTL1-UP)
623K (S/N: WTB1-UP; WTM1-UP)
627K (S/N: WTC1-UP; WTN1-UP)

Description of Change: An improved cover assembly for the engine oil/fuel filter service center is now used on the machines listed above. The improved cover assembly will provide better clearance to the door assembly and cushion hitch hydraulic tubes.

Adaptable To:




Illustration 1g03726208

The improved 426-1616 Cover As (1) is adaptable to machines and effective in production with machines that are listed in Table 1.

Table 1
Sales Model     Adaptable to Machines     Effective in Production with Machines    
621K     S/N:WTA1-111     S/N:WTA112-UP    
S/N:WTL1-101 S/N:WTL102-UP    
623K     S/N:WTB1-141     S/N:WTB142-UP    
S/N:WTM1-106 S/N:WTM107-UP    
627K     S/N:WTC1-163     S/N:WTC164-UP    
S/N:WTN1-103 S/N:WTN104-UP    
Use the following rework procedure in order to update the 426-1616 Cover As on the above listed adaptable machines.

Rework Procedure




    Illustration 2g03726209

    Typical example




    Illustration 3g03726210

    View A

  1. Remove four 8T-4195 Bolts and four 8T-4121 Hard Washers from the hinges of 426-1616 Cover As (D). Save the part.



    Illustration 4g03726211

  1. Remove 384-9398 Gas Spring As (E) from cover assembly (D). Save the part.



    Illustration 5g03726221

  1. Remove cover assembly (D) from the machine.



    Illustration 6g03726212

    View of area F

    (G) 20 mm (0.8 inch)

  1. Mark cover assembly (D) as per the dimensions shown in Illustration 6. Remove the material as per the marked dimension from the vertical and horizontal edges of cover assembly (D) .

    Note: Remove one of the 241-3048 Seal fitted to the horizontal section of cover assembly (D) located within the area of modification. Relocate the seal to a distance 20 mm (0.8 inch) further back on the panel.

  1. Smooth and paint the cut edge of cover assembly (D) .



    Illustration 7g03726213

  1. Install cover assembly (D) to the machine using 384-9398 Gas Spring As that was saved in Step 2.

  1. Secure cover assembly (D) at hinges using four bolts (B) and four hard washers (C) that were saved in Step 1.

    Adjust position of the cover on the hinges to provide adequate clearance and correct operation when opening and closing.

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