Stairmaster Crossrobics 1650 LE Owner's Manual page 56

drive shaft for wear when replacing a failed clutch sprocket.
10. Inspect the full length of the weight stack belt for fraying and verify
that the belt is routed correctly over all of the weight stack belt idler
pulleys (see Figure 17).
11. Check the pedal arm shaft and pedal arm bushings by removing both
pedal arms. Inspect the shaft and bushings for signs of wear and
corrosion. Clean corrosion off the pedal arm shaft with fine steel wool
and replace any worn bushings before reassembling. DO NOT SAND
THE PEDAL ARM SHAFT.
12. Replace all parts, ensuring proper tension of the alternator and drive
reduction belts. Lubricate the drive and pedal chains.
MECHANICAL TROUBLESHOOTING
Page 47