Stairmaster FreeClimber 4600 PT Owner's Manual page 59

9. Remove the HTD belt. Inspect the belt, the Poly-V pulley and the HTD
pulley for excessive wear. Replace if necessary. The Poly-V pulley
should spin freely. If it does not, replace the eccentric shaft assembly.
10. Inspect the HTD pulley for excessive wear and smoothness of
operation. If the pulley is worn, replace it. If it does not spin freely,
remove the first reduction shaft and inspect the bearings.
11. Reinstall all parts, ensuring the proper tension of the Poly-V and HTD
belts and the drive chain (see Figure 30). Clean and lubricate the drive
and step chains with 30W motor oil before reinstalling them.
MECHANICAL TROUBLESHOOTING
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