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  1. Bring a new dewar down to the hutch that needs the replacement. Do not ride on the elevator with it!
  2. On the stinger in the dewar, spin the needle valve counterclockwise to close the valve.
  3. Turn off the roughing pump that is hooked up to the cryohead.
  4. Close the cylinder that is hooked up to the dewar and isolate it.
  5. Close all valves on the dewar. You will not be able to close the vertical one because the stinger is in it.
  6. Vent the poly line that connects the dewar to the helium cylinder and undo the swage fitting on the the dewar side of the poly line.
  7. Wearing gloves and a face shield, open the low pressure relief vent valve to vent out the oolage of the dewar. Keep this open for the remainder of the procedure. Verify that the pressure is dropping on the dewar's gauge.
    1. Keep an eye out for the PRV to freeze over. Use the heat gun to warm up it up so the pressure relief device doesn't freezing open.
  8. Once the pressure is ~ 1 psi in the dewar, start to unscrew the seal that holds the singer into the dewar. You may have to wiggle it a bit.
  9. Take off the "Y" manifold on the horzontal vent valve off, break behind the 1/2" SS NPT female thread.
  10. Deploy a ladder right next to the dewar
  11. Both people need to wear all PPE called out above
  12. One person will climb the ladder and the other stands near the dewar
  13. The person on the ladder will grab the braided hose and near the valves and start to lift up while the person below keeps them lifting straight up and wiggling the stinger.
  14. Once it is fully out of the dewar close the vertical valve.
  15. You may have to pass it back an forth in order for them to climb down the ladder and rest it on a safe place.
  16. Start up the vacuum pump that is connected on the cryo head and make sure stinger is needle valve is fully closed.
  17. Start to heat up the whole stinger with the heating gun for about 10 mins then focus on the very end near the 
  18. Undo the ratcheting straps that tie down the dewar
  19. With two of you remove it from the scale if it is on it, then roll up to the loading dock.
  20. Remove the ODM