True Fitness 600R - Manual (Page 71)

Removal & Replacement 500U
Remove Belt & Tensioner Assembly
Step 1.
Remove small poly-v pulley.
Step 2.
Remove keyway, using flat blade
Screwdriver as required.
Copyright 2001 True Fitness Technology, Inc Page 69
Step 1. Remove Small Poly-v Wheel
Tools Required:
17 mm Box Wrench
5 mm-Hex Wrench
Snap Ring Pliers
Step 2. Remove keyway