Stuck Mouthpiece

jptaylor9 · 11th January 2007, 19:20

Quote: (Originally Posted by Grahjam)

The mouthpiece opened and closed fine when I was setting the unit up at the car, but once underwater I could not close it off, no matter how much I wrestled with it. The mouthpiece would n't budge until it had been out of the water for about 30 minutes and is now fine.

Had same issue, a Narked@90 screw made no difference. I sent it back to the factory & they said it was due to "incompatible tolerances". They changed the outer part of the m/piece; it now works better. The alternative screw is useful (have one fitted) but it doesn't fix the underlying problem.

Talk to Tony at the factory.

JT

Grahjam · 19th February 2007, 17:34

Hi all

Sent the mouthpiece off to APD and got in back 2 days later with the inner core changed over. Having finally managed to shake off the Man Flu I gave it a go in cold water (6 degrees) over the weekend and the mouthpiece could be shut off and opened perfectly, cheers to APD for the fast turn around & excellent customer service.

As noted in the previous replies the problem would appear to be tolerance issues rather than greasing/maintenance.

cheers for the replies & safe divin

Grahjam

mattwave · 19th February 2007, 18:08

I have found that using too much silicon grease can make it sticky after time.

**Gill Envy** · 23rd February 2007, 20:02

a word of cuation for those servicing their mouth piece for the first time. After cleaning, re-assemble with care to allign the pieces properly. the set screw opposite the mouth opening is a bit tricky to align in particular.

Holding the mouth piece in it's open position, facing away from you, toward a light source allows light to shine into the cyclinder and through the
groove and set screw hole revealing weather or not the groove and hole
are alligned (much easier to show than explain, please see attachement).
Delrin is strong but very brittle, and the threads on the screw are very fine, making it easy to strip. The delrin is so smooth that tension can build up between the outer threading and the inside tube when not alligned properly causing the plastic threads to strip suddenly, without
the resistance you'd expect from poor allignment. I did this wrong and the threads and screw popped out (Woops!), requiring replacement...good thing my wife's out of town so I can barrow hers while I await the replacement!

the first photo shows proper allignment, the second photo shows what to avoid.

hope that helps,

dave burke · 24th February 2007, 02:10

Hi There
have a look at APD vido' it show how to srivice the mouthpiece
safe diving
dave

PeteS · 24th February 2007, 05:55

I've had this. I'm convinced it's temperature changes and tight (for that read incorrect) manufacturing tolerances.

When it jams, it's with a breath warmed inner and a cold outer. I can free it by warming the outer with my hands.

I told APD all this 26/2/06. Nearly 12 months ago! They've sorted it now and all is ok.

CraigP · 1st March 2007, 13:04

I had the same problems with my mouthpiece, I sent it back whilst still under warrenty, recieved it back a few days later (great service) It had never felt so free I thought this is great. A week later I tried it out, I was sat there doing a pre breath, checked my hand set then I found I couldn't breath. Put some dil in no better found the mouthpiece had shut off! so I opened it up when I moved my head down it shut off again tried tightening the hoses but no better, everytime I looked down it shut off. I carried out the dive holding it open untill the cold water kicked in, after which it stayed put. However I thought I would try a bail out to o/c but found I couldn't close it again, it was too tight, admitted my hands were cold. Discussed the problem with Tony at APD and agreed to give it another go. I went in the sea this time so possibley not as cold it wouldn't tighten up, kept closing everytime I moved my head so had to bin the dive.

I've now returned it to APD for them to look at again along with my leaky ADV.

Craig

Solitude Diver · 6th January 2008, 22:23

Quote: (Originally Posted by CraigP)

I tried it out, I was sat there doing a pre breath, checked my hand set then I found I couldn't breath. Put some dil in no better found the mouthpiece had shut off! so I opened it up when I moved my head down it shut off again tried tightening the hoses but no better, everytime I looked down it shut off. I carried out the dive holding it open untill the cold water kicked in, after which it stayed put.

I had this same problem happen yesterday. My mouthpiece kept closing as soon as I looked down and would get ready to descend. We cancelled the dive and I looked it over at home. It appears to be fairly loose. I can hold it in my mouth and when I lift the hoses it will close.

I have never had this happen before. Do they get looser over time and need some sort of adjustment? Perhaps the hose just needed to be adjusted so as not to pull? Note: I just had the unit serviced a month ago, and this was to be my 2nd dive. Could it have been over lubed or something?

Any advice would be appreciated.

jptaylor9 · 6th January 2008, 23:10

Quote: (Originally Posted by Solitude Diver)

My mouthpiece kept closing as soon as I looked down and would get ready to descend.I just had the unit serviced a month ago, and this was to be my 2nd dive. Could it have been over lubed or something?

Any advice would be appreciated.

I had the same problem following a mouthpiece service by APD. I stripped mine down & it was packed with an excessive amount of grease. I cleaned in soapy water, rinced, dried & re-greased. It's now OK.

I was told (by factory) to fill the oval slot where the o-ring goes, fit the o-ring & the excess that extrudes is sufficient to lubricate the mouthpiece.

The mouthpice tubes had been changed due to "tigh tolerences" as it locked up on cold dives.

JT

TheBcDiver · 6th January 2008, 23:15

I've encountered the same problem as this on my inspo. I think its down to a combination of tight tolerances and the debilitating effects of cold water and manual dexterity.

I tried stripping the mouthpeice down and regreasing it with silicone grease but with not much effect. I also got a pair of 5mm three finger mitts which helped a fair bit as i was still able to use my hands compared to what they were like with 3mm five finger gloves.

11th January 2007, 19:20	#11 (permalink)
jptaylor9 Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: London, UK Posts: 316	Re: Stuck Mouthpiece Quote: (Originally Posted by Grahjam) The mouthpiece opened and closed fine when I was setting the unit up at the car, but once underwater I could not close it off, no matter how much I wrestled with it. The mouthpiece would n't budge until it had been out of the water for about 30 minutes and is now fine. Had same issue, a Narked@90 screw made no difference. I sent it back to the factory & they said it was due to "incompatible tolerances". They changed the outer part of the m/piece; it now works better. The alternative screw is useful (have one fitted) but it doesn't fix the underlying problem. Talk to Tony at the factory. JT
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19th February 2007, 17:34	#12 (permalink)
Grahjam New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Sep 2006 Location: Warrington (a delightful Cheshire Hamlet) - UK Posts: 31	Re: Stuck Mouthpiece - & The Outcome Hi all Sent the mouthpiece off to APD and got in back 2 days later with the inner core changed over. Having finally managed to shake off the Man Flu I gave it a go in cold water (6 degrees) over the weekend and the mouthpiece could be shut off and opened perfectly, cheers to APD for the fast turn around & excellent customer service. As noted in the previous replies the problem would appear to be tolerance issues rather than greasing/maintenance. cheers for the replies & safe divin Grahjam
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19th February 2007, 18:08	#13 (permalink)
mattwave New Member Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Classic Join Date: Oct 2005 Location: Seattle Posts: 47	Re: Stuck Mouthpiece I have found that using too much silicon grease can make it sticky after time.
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24th February 2007, 02:10	#15 (permalink)
dave burke Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Dec 2006 Location: kent Posts: 137	Re: Stuck Mouthpiece Hi There have a look at APD vido' it show how to srivice the mouthpiece safe diving dave Last edited by dave burke : 24th February 2007 at 16:45.
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24th February 2007, 05:55	#16 (permalink)
PeteS Consent Issued! Current Rebreather/s: Inspiration Classic Inspiration Vision Other Rebreather/s: Join Date: Jun 2005 Location: New Zealand Posts: 539	Re: Stuck Mouthpiece I've had this. I'm convinced it's temperature changes and tight (for that read incorrect) manufacturing tolerances. When it jams, it's with a breath warmed inner and a cold outer. I can free it by warming the outer with my hands. I told APD all this 26/2/06. Nearly 12 months ago! They've sorted it now and all is ok. __________________ Pete S. http://www.steggle.co.nz Every silver lining has a cloud
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1st March 2007, 13:04	#17 (permalink)
CraigP New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jan 2007 Location: HULL, UK Posts: 3	Re: Stuck Mouthpiece I had the same problems with my mouthpiece, I sent it back whilst still under warrenty, recieved it back a few days later (great service) It had never felt so free I thought this is great. A week later I tried it out, I was sat there doing a pre breath, checked my hand set then I found I couldn't breath. Put some dil in no better found the mouthpiece had shut off! so I opened it up when I moved my head down it shut off again tried tightening the hoses but no better, everytime I looked down it shut off. I carried out the dive holding it open untill the cold water kicked in, after which it stayed put. However I thought I would try a bail out to o/c but found I couldn't close it again, it was too tight, admitted my hands were cold. Discussed the problem with Tony at APD and agreed to give it another go. I went in the sea this time so possibley not as cold it wouldn't tighten up, kept closing everytime I moved my head so had to bin the dive. I've now returned it to APD for them to look at again along with my leaky ADV. Craig
(Offline)

6th January 2008, 22:23	#18 (permalink)
Solitude Diver New Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Nov 2007 Location: Seattle, WA Posts: 36	Re: Loose Mouthpiece Quote: (Originally Posted by CraigP) I tried it out, I was sat there doing a pre breath, checked my hand set then I found I couldn't breath. Put some dil in no better found the mouthpiece had shut off! so I opened it up when I moved my head down it shut off again tried tightening the hoses but no better, everytime I looked down it shut off. I carried out the dive holding it open untill the cold water kicked in, after which it stayed put. I had this same problem happen yesterday. My mouthpiece kept closing as soon as I looked down and would get ready to descend. We cancelled the dive and I looked it over at home. It appears to be fairly loose. I can hold it in my mouth and when I lift the hoses it will close. I have never had this happen before. Do they get looser over time and need some sort of adjustment? Perhaps the hose just needed to be adjusted so as not to pull? Note: I just had the unit serviced a month ago, and this was to be my 2nd dive. Could it have been over lubed or something? Any advice would be appreciated.
(Offline)

6th January 2008, 23:10	#19 (permalink)
jptaylor9 Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: London, UK Posts: 316	Re: Loose Mouthpiece Quote: (Originally Posted by Solitude Diver) My mouthpiece kept closing as soon as I looked down and would get ready to descend.I just had the unit serviced a month ago, and this was to be my 2nd dive. Could it have been over lubed or something? Any advice would be appreciated. I had the same problem following a mouthpiece service by APD. I stripped mine down & it was packed with an excessive amount of grease. I cleaned in soapy water, rinced, dried & re-greased. It's now OK. I was told (by factory) to fill the oval slot where the o-ring goes, fit the o-ring & the excess that extrudes is sufficient to lubricate the mouthpiece. The mouthpice tubes had been changed due to "tigh tolerences" as it locked up on cold dives. JT Last edited by jptaylor9 : 6th January 2008 at 23:12.
(Offline)

6th January 2008, 23:15	#20 (permalink)
TheBcDiver New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Aug 2006 Location: Co. Antrim Posts: 39	Re: Stuck Mouthpiece I've encountered the same problem as this on my inspo. I think its down to a combination of tight tolerances and the debilitating effects of cold water and manual dexterity. I tried stripping the mouthpeice down and regreasing it with silicone grease but with not much effect. I also got a pair of 5mm three finger mitts which helped a fair bit as i was still able to use my hands compared to what they were like with 3mm five finger gloves.
(Offline)

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