1. Air pressure in starting air receiver too low.
2. Main valve(s) closed.
3. Pinion does not engage with the flywheel.
4. Air motor runs, pinion engages but does not rotate. (Shaft broken)
2. Main valve(s) closed.
3. Pinion does not engage with the flywheel.
4. Air motor runs, pinion engages but does not rotate. (Shaft broken)
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