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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>James, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would be betting a penny to a pound that it is the contraction of the metal when you welded it and it will be pulling a bit. Easiest way to check is to take the pins out of the hinges and put the hatch in the closed position and see what the pin alignment looks like. You may be able to clamp in place and then put a reamer through and an oversize pin. Probably by this time you will have checked all that anyway. Regards, Hugh <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>James Frankland via Personal_Submersibles<br><b>Sent:</b> Wednesday, 23 March 2016 5:21 a.m.<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] hatch pin<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Hank.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>I did exactly that. Locked the hatch shut dead tight and welded the hinges and brackets etc on with no leeway in the pin. When it was done, the hatch didn't close properly. I don't know why. I filed about 1mm off the hinge holes and then it closed. I don't seem to notice any play with the springs on and the hatch doesn't leak.<o:p></o:p></p></div><div><p class=MsoNormal><br>Regards<o:p></o:p></p></div><div><p class=MsoNormal>James<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 22 March 2016 at 15:03, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></p><div><div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>Hi All,<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>When I built my hatch system, I built it so the hinge pin has moment in it so the o-ring would have full contact before the hatch was fully closed metal to metal.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>When I vacuum test it, the hatch is not perfectly even in the seat, or at least it seems like it. I am wondering if I should close the hatch with the o-ring out and the hatch perfectly positioned and then weld bushings to the hinge so the pin has no movement. Or should I leave it alone and expect that the external pressure will push the hatch into place? <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>Hank<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:helveticaneue;color:black'>Scott, did you notice if your hatch hinge has play?<o:p></o:p></span></p></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>