Parts Needed:
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The Sport Mechanic and Recreational stands use the Spinner Knob Cam Pocket Part no.15684
The Cam Pocket can be removed without removing the clamp from the stand
 Remove clamp from head by unscrewing completely |  Use a flat prying tool to remove cam pocket |
 Cam Pocket it now removable |  Remove cam pocket |
 Install new cam pocket |  Tap with hammer until it clicks into place and reinstall clamp by threading it back into the head |
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Replacing the Spinner Knob Assembly