Video: Replacing O-rings on a 9plus CTD

Pat, one of Sea-Bird Scientific’s Senior Service Technicians, graciously donned a head camera to demonstrate how he replaces O-rings on a 9plus endcap. Though this procedure is for a 9plus CTD, the general principles apply across instruments:

1. Remove old O-rings
2. Clean the O-ring surfaces (everywhere the O-rings touch)
3. Apply a thin layer of lubricant to the O-ring surface
4. Apply a thin layer of lubricant to the O-ring
5. Clean up excess lubricant
6. Inspect and close the housing