I just bought me one so there's no servicing to be done for a while yet. But what I intend to do is the following:
- Put on, check all buckles etc.
- Inflate manually (orally), check for leaks/deflation over a longer period (24 hours or something)
- Get very accurate kitchen scales and measure the weight of the CO2 bottle. (The empty weight should be on the cylinder and it should be filled with x grams of CO2. So that should be the combined weight.)
- While the cylinder is removed, visually check the mechanism for proper function.
Yes, the ultimate test would be to inflate the vest automatically but getting an exchange bottle plus a new plastic thingy to cover the inflation mechanism is just a little too costly.