H45/H45S, H50/H50S, 63/H63/H63S, 70/70S/H70/H70S, H90C/H90CS and 100/H100/H100S Hydraulic Hammers Tool Bushing (Upper) - Inspect/Replace - H90C/H90Cs and H100/H100s Only Caterpillar


Tool Bushing (Upper) - Inspect/Replace - H90C/H90Cs and H100/H100s Only
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  1. Remove the hammer tool. Inspect the hammer tool. Refer to Operation and Maintenance Manual, "Tool (Hammer) - Inspect".

  2. Remove the lower tool bushing. Inspect the lower tool bushing. Refer to Operation and Maintenance Manual, "Tool Bushing (Lower) - Inspect/Replace".

  3. Remove the upper tool bushing.

  4. Inspect the upper tool bushing for excessive wear. Inspect the upper tool bushing for damage.


    Illustration 1g00815770

  5. Measure Dimension (A). Dimension (A) is from the top of the tool to the top of the tool bushing. You must use a AVSpare hammer tool for the measurement. Measure Dimension (B). Refer to Table 1 for the acceptable dimensions.

    Table 1
    Specifications for Upper Tool Bushing for H90C, H90Cs, 100, 100s, H100, and H100s  
    Sales Model  Minimum Distance (A)  Maximum Diameter (B) 
    H90C, H90Cs  28 mm (1.10 inch)  86 mm (3.4 inch) 
    100, 100s, H100, H100s  38 mm (1.50 inch)  97 mm (3.8 inch) 

  6. If the upper tool bushing has any damage, you must replace the bushing. If the upper tool bushing has any cracks, you must replace the bushing. If the upper tool bushing does not meet the dimensions in Table 1, you must replace the bushing.

  7. Coat all of the outer surfaces of the upper tool bushing with 5P-3931 Anti-Seize Compound. Install the upper tool bushing into the head.

  8. Coat all of the outer surfaces of the lower tool bushing with 5P-3931 Anti-Seize Compound. Install the lower tool bushing into the head.

  9. Coat the sides of the hammer tool that contact the tool bushings with grease. Install the hammer tool into the tool bushings.

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