September 7, 201510 yr One of my dewar lose vacuum. I have vacuum pump but i need other parts. Dewar looks like this http://www.ebay.com/itm/MVE-SC-20-20-vapor-LIQUID-NITROGEN-TANK-Cryogenic-Dewar-tank/321827460148?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D33097%26meid%3D9735227fcf914465a5353c41746544da%26pid%3D100011%26rk%3D2%26rkt%3D10%26sd%3D221849619347
September 7, 201510 yr Would this help? http://forum.hwbot.org/showthread.php?t=129827 that's the guide i used to redo the vacuum on my old dewar, only difference is the original vacuum was held by a ball Bering and some "glue" to remove it i used heat and a little force. good luck
February 20, 20178 yr that's the guide i used to redo the vacuum on my old dewar, only difference is the original vacuum was held by a ball Bering and some "glue" to remove it i used heat and a little force. good luck could you share some tips. I have the same ball bearing type but cant get it out. I used a heat gun and flat heat screw driver so far but had no luck. Edited February 20, 20178 yr by lilchronic
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