1. Inspect hammer spring for deformities, breaks, and bends. Pay special attention to the large coil.
Replace hammer spring if defective.
2. Inspect cam clutch spring and burst cam for deformities, breaks, and bends; replace if defective.
3. Inspect hammer and hammer pin retainer assembly for chips and breaks. Hammer pin should click home under strong finger pressure. Install hammer pin into hole in hammer to check spring retention of the hammer pin. Replace hammer and hammer pin retainer assembly if defective.
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