FM-21: FM-21 INTERNAL GRINDING, KNOCKING, OR SCRAPING AT NO LOAD

Continuous abnormal grinding, knocking, or scraping noises occur at no load with the bit removed.

• Debris or damage is present at the chuck nose
• Front support, bearing, or anvil is worn
• Reduction gears or hammer parts are damaged
• A loose internal part is contacting the rotating drive

1. No-load operation is smooth except for normal motor sound and an occasional direction-change click.

1.

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• With the bit removed, the driver makes continuous abnormal grinding, knocking, or scraping.

  With the bit removed, the driver makes continuous 1. Remove the pack and bit; inspect the chuck nose, housing, and vents for

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

Trang công khai chỉ hiển thị bản xem trước. Mua hướng dẫn đầy đủ để tải toàn bộ các bước sửa chữa, sơ đồ và quy trình xác minh.