Major Components Of The Drive System - Stairmaster 8G Gauntlet Service Manual

Major Components of the Drive System

The detail view of the 8G with the drive train isolated (above) shows the upper sprocket connection to the gear box via
drive chain. The gear box is in place to ensure gearing up/down is handled appropriately during a user workout. The
upper sprocket has an inner sprocket that connects the drive chain to the gear box sprocket. There is an idler arm and
sprocket on the gear box to assist with keeping tension on the drive chain.
The idler arm moves with the chain and tensions the chain that connects the sprockets. Resistance is applied to the
steps of the machine by use of an alternator. Variable power from the lower board is fed into the alternator to control the
amount of resistance it applies. A Poly-V belt connects the alternator to the brake and gearbox assembly. The alternator
is locked into position to properly tension the Poly-V belt.
The locking brake prevents the steps from moving when the unit is at rest and completely releases during use.
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