Stairmaster 8G Gauntlet Service Manual page 65

6. To ensure alignment, insert a metric #3 hex
key between the body of the gearbox and
the gearbox pulley.
7. Push the gearbox pulley up against the #3
metric hex key so that the hex key is snug
between the body of the gearbox and the
gearbox pulley.
8. Once aligned, re-tighten grub screw on
gearbox pulley.
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