Part Identification And Component Theory; Drive System - Stairmaster 8G Gauntlet Service Manual

Part Identification & Component Theory

Drive System

The 8G drive system is a 3 part system that combines an alternator that provides resistance, a gear box that handles the
torque load and to ensure gearing up/down is handled appropriately during a user workout and while braking, and
the brake that prevents the steps from moving while stopped. This in turn is connected to the steps through the upper
sprocket and the chains that are directly connected to the steps. In the diagram above you can see the entire drive
system and the unit frame isolated from other parts and cabling. The upper sprocket has an inner sprocket that con-
nects 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 ensures that the bolt that connects it to the gear box
is not over tensioned.
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