FM-20: THE CLUTCH NEVER RELEASES AND OVERDRIVES FASTENERS AT LOW SETTINGS

FM-20

• Collar is actually in drill mode or a high setting
• Fastener, bit, or scrap material is unsuitable for the comparison
• Clutch cam, spring, or detent is jammed
• Gearbox or spindle bypasses the torque-limiting mechanism

1. The clutch ratchets before overdriving at an appropriate low setting, or the no-release fault is proven.

1. Install a verified battery and drive slowly while holding the tool straight, stopping immediately if the fastener begins to overdrive without ratcheting.
2. If several low settings never release under a valid comparison, remove the battery and route the clutch and gearbox to service.
3. Remove the battery and set up a matching fastener and sound driver bit in suitable scrap material.
4. Set the collar to a low numbered position, use range 1, and confirm the index is not on drill mode.

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

• The collar moves and holds a low numbered setting, but the clutch does not ratchet before a test fastener is overdriven in suitable scrap material.

  The collar moves and holds a low numbered setting, but the 1. Remove the battery and set up a matching fastener and sound driver bit in

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

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