2008/08/25 Caterpillar


Improved Lower Pin Joint for Bucket {6107, 6108, 6109, 6118}

Usage:

988G 2TW
Wheel Loader:
988G (S/N: BNH1-UP; 2TW1-UP)
988H (S/N: BXY1-UP)

Description of Change: New shims are now used in the lower pin joints for the bucket on the above listed machines. These shims reduce the amount of axial play in the pin joint. This will increase the life of the seals and the lubricant. This will reduce wear on the bearing and the pin.

Adaptable To: The new shims are effective with the following machines:

  • 988H (S/N: BXY2543-UP)

The new shims are adaptable to the following machines:

  • 988G (S/N: BNH1-UP; 2TW1-UP)

  • 988H (S/N: BXY1-2542)

Refer to the following procedure to install the new shims.

Installation Procedure

Table 1
New Shims    
Part Number     Part Description     Size    
279-6102     Shim    
1 mm (0.040 inch)    
279-6103     Shim    
2 mm (0.079 inch)    



    Illustration 1g01624802

    Top of the bucket centered on the boom.




    Illustration 2g01624935

    View A-A

    (A) Lower pin joints for the bucket are centered on the boom.

  1. Center the bucket on the boom. Refer to Illustration 1 and Illustration 2.



    Illustration 3g01624803

    View of pin joint and retention plate

    (B) Shim

    (C) Retention plate

    (D) Flag

  1. Insert the bucket pins in order to determine the location and the quantity of the required shims. The gap should be between 0.5 mm (0.020 inch) and 1 mm (0.040 inch).



    Illustration 4g01624947

    View of shimmed flag

    (E) Shim above flag

    (F) Shim below flag

  1. Adding the shims above the flag and below the flag will reduce the gap.

  1. Torque the end plate on the pin and the retention plate for the flag with the normal installation procedures.

  1. Verify that the gap between the flag and the retention plate is between 0.5 mm (0.020 inch) and 1 mm (0.040 inch).

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