failure mode
FM-11: FM-11 THE MOTOR RUNS BUT THE CHUCK DOES NOT ROTATE
FM-11 THE MOTOR RUNS BUT THE CHUCK DOES NOT ROTATE
Diagnostic overview
FM-11 THE MOTOR RUNS BUT THE CHUCK DOES NOT ROTATE
Likely Root Causes
- Gear shifter is between low and high range
- Switchover unit does not engage the selected range
- Gearbox teeth or coupling are stripped
- Clutch or spindle drive has separated
- Motor pinion or internal retainer has failed
Quick Checks
- Motor sound and chuck rotation start, vary, and stop together.
Repair Preview
1.
This is a preview of the troubleshooting guidance included in the full repair manual.
Related symptoms
The motor can be heard, but the chuck remains still or turns only intermittently.
The motor can be heard, but the chuck remains still or 1. At motor-without-drive, release the trigger, wait for stop, center-lock, and
Included in the full manual
- root cause analysis
- tools needed
- step-by-step repair procedure
- diagrams
- exploded views
- post-repair checks
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