Anyone else have trouble replacing 02 sensors?

Mixaddict · 17th February 2007, 22:03

Maybe I am just a little uncoordinated, but I am having a very difficult time screwing in the new O2 sensors back into my Inspiration Vision head. I can't seem to get the threads to grab hold, and I am nervous about stripping out the threads on both the head as well as the sensors.

Has anyone had a similar problem, and if so, how did you make it work?

Regards,
Randy

mik · 18th February 2007, 08:45

As if anyone is going to be silly enough to admit to this embarrassing mistake

I have a 'friend' who cross-threaded one of his cells within *minutes* of getting his brand new Inspiration home. Eventually 'he' just screwed it in as tight and put the head back on.

I too hope someone has some advice for my 'friend'

Mdemon · 18th February 2007, 10:55

They are bastards to get in, aren't they?

The only tip I have is to make sure the cell face is exactly 90 degrees all round to the face of the hole - and to be firm pushing while twisting. I haven't stripped threads only because the delrin seems tougher than the cell plastic.

4ster · 18th February 2007, 15:38

I know nothing about O2 cells and Inspo heads, but knowing nothing usually never stops me from having an opinion...

When dealing with fine threads the best trick I know is to apply gentle pressure to the part and then keeping it as straight as possible, "unscrew" the part in the hole. When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading.

**PhilSiswick** · 18th February 2007, 16:15

Quote: (Originally Posted by 4ster)

I know nothing about O2 cells and Inspo heads, but knowing nothing usually never stops me from having an opinion...

When dealing with fine threads the best trick I know is to apply gentle pressure to the part and then keeping it as straight as possible, "unscrew" the part in the hole. When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading.

Sadly, that didn't work for me, but I could see evidence that it was damaging the threads on the cell.

My trick - get someone more patient to do it ;-)

Cheers,

Andrew-John · 18th February 2007, 20:37

Quote: (Originally Posted by 4ster)

When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading.

I would replace the second sentence as follows: Then holding a strong push start screwing the cell into the hole.

Good luck

Andrew John

tflaris · 19th February 2007, 00:04

Quote: (Originally Posted by Mixaddict)

Maybe I am just a little uncoordinated, but I am having a very difficult time screwing in the new O2 sensors back into my Inspiration Vision head. I can't seem to get the threads to grab hold, and I am nervous about stripping out the threads on both the head as well as the sensors.

Has anyone had a similar problem, and if so, how did you make it work?

Regards,
Randy

I have an evo and thought the cells where a plug style cap that you pulled off. have you contacted AP Valves or looked int he manual. It is available on their weebsite.

If this is the wrong direction my apologies.

**PhilSiswick** · 19th February 2007, 09:42

Quote: (Originally Posted by tflaris)

I have an evo and thought the cells where a plug style cap that you pulled off. have you contacted AP Valves or looked int he manual. It is available on their weebsite.

If this is the wrong direction my apologies.

That's the connection to the controllers. We're talking about screwing them into the holder itself - different problem.

Cheers,

CharlieT · 19th February 2007, 11:08

I lack confidence when it comes to anything more complicated than changing sofnolime or batteries but have managed to put in two sets of O2 sensors so far (somehow)!

Lining the little sods up straight is essential and then sensing when you've got one not going in straight is the next most important step. Back off and try again before doing any damage to the thread.

I find pulling off the blue connector caps quite a struggle

I worry I'll break something if I use too much force.

Charlie

**PhilSiswick** · 19th February 2007, 11:20

Quote: (Originally Posted by CharlieT)

I find pulling off the blue connector caps quite a struggle

I worry I'll break something if I use too much force.

Charlie

They seem to have an interesting separation pressure. I needed to put what felt like quite a lot of force on them to get them moving, then back off before I tore the cable out of the head.

I think we're probably all worrying too much, based on all the posts of doom about the fragility of the heads. The threads on in the head are stronger than those on the cell, so although it'll be annoying to cross thread a cell, it won't mean replacing the tower. A bit of practice and even I think I'll be able to take the coax connectors off without tearing them out of the head ;-)

Oh, and following the 3 second on/off rule in the future will stop me thinking I've knackered something after changing a cell. I had to do three reboots before I calmed myself down enough. I was absolutely convinced I'd wrecked something expensive when the head wouldn't boot properly after changing the cell :-(

Cheers,

17th February 2007, 22:03	#1 (permalink)
Mixaddict RBW Member Current Rebreather/s: Inspiration Vision Evolution Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Jan 2006 Location: Draper, Utah USA Posts: 524	Anyone else have trouble replacing 02 sensors? Maybe I am just a little uncoordinated, but I am having a very difficult time screwing in the new O2 sensors back into my Inspiration Vision head. I can't seem to get the threads to grab hold, and I am nervous about stripping out the threads on both the head as well as the sensors. Has anyone had a similar problem, and if so, how did you make it work? Regards, Randy __________________ Randy Thornton (MixAddict) Inspiration, Evolution, Hammerhead & Sentinel CCR Instructor
(Offline)

18th February 2007, 08:45	#2 (permalink)
mik New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Sep 2006 Location: Sydney North Posts: 75	Re: Anyone else have trouble replacing 02 sensors? As if anyone is going to be silly enough to admit to this embarrassing mistake I have a 'friend' who cross-threaded one of his cells within minutes of getting his brand new Inspiration home. Eventually 'he' just screwed it in as tight and put the head back on. I too hope someone has some advice for my 'friend' __________________ It just fell apart in my hands, Chief!
(Offline)

18th February 2007, 10:55	#3 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Anyone else have trouble replacing 02 sensors? They are bastards to get in, aren't they? The only tip I have is to make sure the cell face is exactly 90 degrees all round to the face of the hole - and to be firm pushing while twisting. I haven't stripped threads only because the delrin seems tougher than the cell plastic. __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
(Offline)

18th February 2007, 15:38	#4 (permalink)
4ster Steve Sprague Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2006 Location: Arlington, Washington Posts: 303	Re: Anyone else have trouble replacing 02 sensors? I know nothing about O2 cells and Inspo heads, but knowing nothing usually never stops me from having an opinion... When dealing with fine threads the best trick I know is to apply gentle pressure to the part and then keeping it as straight as possible, "unscrew" the part in the hole. When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading. __________________ Steve "My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn Last edited by 4ster : 18th February 2007 at 15:40. Reason: bad spelling
(Offline)

18th February 2007, 16:15	#5 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,099	Re: Anyone else have trouble replacing 02 sensors? Quote: (Originally Posted by 4ster) I know nothing about O2 cells and Inspo heads, but knowing nothing usually never stops me from having an opinion... When dealing with fine threads the best trick I know is to apply gentle pressure to the part and then keeping it as straight as possible, "unscrew" the part in the hole. When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading. Sadly, that didn't work for me, but I could see evidence that it was damaging the threads on the cell. My trick - get someone more patient to do it ;-) Cheers, __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
(Offline)

18th February 2007, 20:37	#6 (permalink)
Andrew-John New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Oct 2005 Location: Helsinki Posts: 26	Re: Anyone else have trouble replacing 02 sensors? Quote: (Originally Posted by 4ster) When they are lined up properly you should feel (and sometimes hear) the lead thread on the part drop into the threads in the hole. Then start gently screwing the part into the hole. This usually avoids cross threading. I would replace the second sentence as follows: Then holding a strong push start screwing the cell into the hole. Good luck Andrew John __________________ The Truth is down There!
(Offline)

19th February 2007, 00:04	#7 (permalink)
tflaris God save the Queen Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Evolution Megalodon Join Date: Oct 2006 Location: Neptune Beach, Florida Posts: 274	Re: Anyone else have trouble replacing 02 sensors? Quote: (Originally Posted by Mixaddict) Maybe I am just a little uncoordinated, but I am having a very difficult time screwing in the new O2 sensors back into my Inspiration Vision head. I can't seem to get the threads to grab hold, and I am nervous about stripping out the threads on both the head as well as the sensors. Has anyone had a similar problem, and if so, how did you make it work? Regards, Randy I have an evo and thought the cells where a plug style cap that you pulled off. have you contacted AP Valves or looked int he manual. It is available on their weebsite. If this is the wrong direction my apologies. __________________ "Except for this one, I have come to the conclusion that all generalizations are false" -Jim Hayes
(Offline)

19th February 2007, 09:42	#8 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,099	Re: Anyone else have trouble replacing 02 sensors? Quote: (Originally Posted by tflaris) I have an evo and thought the cells where a plug style cap that you pulled off. have you contacted AP Valves or looked int he manual. It is available on their weebsite. If this is the wrong direction my apologies. That's the connection to the controllers. We're talking about screwing them into the holder itself - different problem. Cheers, __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
(Offline)

19th February 2007, 11:08	#9 (permalink)
CharlieT Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Nov 2005 Location: London Posts: 449	Re: Anyone else have trouble replacing 02 sensors? I lack confidence when it comes to anything more complicated than changing sofnolime or batteries but have managed to put in two sets of O2 sensors so far (somehow)! Lining the little sods up straight is essential and then sensing when you've got one not going in straight is the next most important step. Back off and try again before doing any damage to the thread. I find pulling off the blue connector caps quite a struggle I worry I'll break something if I use too much force. Charlie
(Offline)

19th February 2007, 11:20	#10 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,099	Re: Anyone else have trouble replacing 02 sensors? Quote: (Originally Posted by CharlieT) I find pulling off the blue connector caps quite a struggle I worry I'll break something if I use too much force. Charlie They seem to have an interesting separation pressure. I needed to put what felt like quite a lot of force on them to get them moving, then back off before I tore the cable out of the head. I think we're probably all worrying too much, based on all the posts of doom about the fragility of the heads. The threads on in the head are stronger than those on the cell, so although it'll be annoying to cross thread a cell, it won't mean replacing the tower. A bit of practice and even I think I'll be able to take the coax connectors off without tearing them out of the head ;-) Oh, and following the 3 second on/off rule in the future will stop me thinking I've knackered something after changing a cell. I had to do three reboots before I calmed myself down enough. I was absolutely convinced I'd wrecked something expensive when the head wouldn't boot properly after changing the cell :-( Cheers, __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode