FM-20: Vibration is excessive with a centered disc

The tool shakes abnormally even though a fresh correct disc is centered and fully attached.

• Pad is loose, distorted, or damaged
• Belt or eccentric is damaged
• Drive bearing is worn
• Debris or uneven disc is unbalancing the pad

1. The tool runs with normal random-orbit vibration at low speed.

1. Set O, remove the battery, and refit a fresh disc with all holes centered.
2. Inspect pad flatness, four screws, skirt clearance, and debris around the pad.
3. Run briefly at low speed with a firm grip and no work contact.
4. If severe vibration remains, remove the pack and use authorized service.

This is a preview of the troubleshooting guidance included in the full repair manual.

• Eccentric drive and bearing
• Brushless motor and fan
• Sanding pad and four screws

• Vibration is excessive with a centered disc

  The tool shakes abnormally even though a fresh correct disc is centered and fully attached.

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

Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.