FM-15: FM-15 A 1/4-IN. HEX BIT WILL NOT INSERT OR LOCK

A correct-looking 1/4-inch hex bit will not insert fully or lock in the chuck.

• Bit shank is wrong size, rounded, burred, or damaged
• Bit is shorter than the recommended 2 inches
• Debris blocks the chuck bore or detent
• Retention ball, spring, or sleeve is worn

1. A correct long impact-rated bit seats fully and remains locked after a firm tug.

1.

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

• A correct-looking bit will not enter fully or can be pulled out after the collar is released.

  A correct-looking bit will not enter fully or can be pulled 1. Remove the battery and inspect the bit shank for the correct clean 1/4-in. hex

• 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.