Replacement serrated lockwasher 4 Howell BOV?

RebreatherDave · 25th February 2006, 04:47

Ok, I have had a leaky Bob Howell OC/DSV for 6 months now, the o-ring between the main body bottom and the bailout second stage is leaking....so much for positive and negative pressure checks.....

I have a complete replacment 0-ring kit from an awfully helpful bloke from teh UK, but that serrated one way stainless washer that grips the cylinder that protrudes up into the main body and holds it in place looks like it needs to be cut out to remove it, hence the need for a replacement, but.....

Nobody seemsd to know where to get that exact size serrated one way stainless steel washer...

Any direct leads?

divetheworld · 25th February 2006, 12:58

Quote: (Originally Posted by RebreatherDave)

Ok, I have had a leaky Bob Howell OC/DSV for 6 months now, the o-ring between the main body bottom and the bailout second stage is leaking....so much for positive and negative pressure checks.....

I have a complete replacment 0-ring kit from an awfully helpful bloke from teh UK, but that serrated one way stainless washer that grips the cylinder that protrudes up into the main body and holds it in place looks like it needs to be cut out to remove it, hence the need for a replacement, but.....

Nobody seemsd to know where to get that exact size serrated one way stainless steel washer...

Any direct leads?

If you stike out, I'll be interested in the bits to keep mine going!
Shy bairns get nee toys laddie.

Brent

RebreatherDave · 25th February 2006, 15:01

Damn, you blokes get all the good folk sayings....

divetheworld · 25th February 2006, 17:31

Quote: (Originally Posted by RebreatherDave)

Damn, you blokes get all the good folk sayings....

But you guys get V8's and to play with guns.

ROB DAVIE · 25th February 2006, 18:04

Quote: (Originally Posted by divetheworld)

But you guys get V8's and to play with guns.

How about a 7.3 litre turbo-diesel, and an FN-FAL (The free world's strong right arm!) Yee-haw, baby!

Sorry about helping with the hi-jack, Dave!

Mdemon · 25th February 2006, 20:20

Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too...

I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with.

Brent, any chance of doing a full tear-down article on it?

divetheworld · 25th February 2006, 22:39

Quote: (Originally Posted by Mdemon)

Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too...

I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with.

Brent, any chance of doing a full tear-down article on it?

No problem. Give a little while on that one, up to my neck in stuff right now.
I'll try to get round to it after next weekend and post it here. Might even throw in a few drawings for replacement parts too.

Brent.

Nick uk. · 25th February 2006, 23:08

Quote: (Originally Posted by Mdemon)

Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too...

I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with.

Brent, any chance of doing a full tear-down article on it?

IDEM!

RebreatherDave · 2nd March 2006, 06:10

I think the whole execution of using a serrated stainless steel washer with teeth impinging upon Delrin style of plastic is an inferior way of retaining the round protrusion up into the the upper DSV valve body. The plastic is just too soft to keep a good, consistent tension on the plastic and keeping the o-ring in between the two bodies in a proper compression

If I had full access to it all and had 8 octopus arms, maybe I could spring enough of the teeth upwards to remove it and get to that 0-ring underneath without damaging the serrated tooth washer. I think those serrate steel toothed washers are designed to be pushed down once, then cut out and replaced.

Bob must have delt with this issue, but nobody seems to know how to get a hold of him......

In retropsect, I don't think any of this needs to swivel at all.....The Cis unit had a fixed horizontally aligned 2nd stage diaphragm and this made the unit more streamlined.....

RebreatherDave · 2nd March 2006, 06:17

As an update, I have determined that the correct name for that style of lock washer is a "metric internal tooth lock washer"

When I have a chance I am going to disassemble my Howell OC/DSV and measure with a metric digital caliper the round portion that protrudes up into the upper body and is gripped by the lock washer. Once I get a metric equivalent and washer thickness dimension and approximate tooth count I will start searching the Internet for that size.....

What a hassle of a lousy 50 cent washer!

25th February 2006, 04:47	#1 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Replacement serrated lockwasher 4 Howell BOV? Ok, I have had a leaky Bob Howell OC/DSV for 6 months now, the o-ring between the main body bottom and the bailout second stage is leaking....so much for positive and negative pressure checks..... I have a complete replacment 0-ring kit from an awfully helpful bloke from teh UK, but that serrated one way stainless washer that grips the cylinder that protrudes up into the main body and holds it in place looks like it needs to be cut out to remove it, hence the need for a replacement, but..... Nobody seemsd to know where to get that exact size serrated one way stainless steel washer... Any direct leads?
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25th February 2006, 12:58	#2 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,586	Re: Replacement serrated lockwasher 4 Howell BOV? Quote: (Originally Posted by RebreatherDave) Ok, I have had a leaky Bob Howell OC/DSV for 6 months now, the o-ring between the main body bottom and the bailout second stage is leaking....so much for positive and negative pressure checks..... I have a complete replacment 0-ring kit from an awfully helpful bloke from teh UK, but that serrated one way stainless washer that grips the cylinder that protrudes up into the main body and holds it in place looks like it needs to be cut out to remove it, hence the need for a replacement, but..... Nobody seemsd to know where to get that exact size serrated one way stainless steel washer... Any direct leads? If you stike out, I'll be interested in the bits to keep mine going! Shy bairns get nee toys laddie. Brent __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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25th February 2006, 15:01	#3 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Re: Replacement serrated lockwasher 4 Howell BOV? Damn, you blokes get all the good folk sayings....
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25th February 2006, 17:31	#4 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,586	Re: Replacement serrated lockwasher 4 Howell BOV? Quote: (Originally Posted by RebreatherDave) Damn, you blokes get all the good folk sayings.... But you guys get V8's and to play with guns. __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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25th February 2006, 18:04	#5 (permalink)
ROB DAVIE Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: HOUSTON, REPUBLIC OF TEJAS Posts: 1,120	Re: Replacement serrated lockwasher 4 Howell BOV? Quote: (Originally Posted by divetheworld) But you guys get V8's and to play with guns. How about a 7.3 litre turbo-diesel, and an FN-FAL (The free world's strong right arm!) Yee-haw, baby! Sorry about helping with the hi-jack, Dave! __________________ [SIZE=2]"CC Rebreathers will become a viable part of tech diving [U]WHEN PIGS FLY[/U]!!"--GI3[/SIZE]
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25th February 2006, 20:20	#6 (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: 1,927	Re: Replacement serrated lockwasher 4 Howell BOV? Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too... I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with. Brent, any chance of doing a full tear-down article on it? __________________ 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?"
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25th February 2006, 22:39	#7 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,586	Re: Replacement serrated lockwasher 4 Howell BOV? Quote: (Originally Posted by Mdemon) Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too... I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with. Brent, any chance of doing a full tear-down article on it? No problem. Give a little while on that one, up to my neck in stuff right now. I'll try to get round to it after next weekend and post it here. Might even throw in a few drawings for replacement parts too. Brent. __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. CHECK OUT OUR INTERWEBS FOR CUSTOM REBREATHER UPGRADES *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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25th February 2006, 23:08	#8 (permalink)
Nick uk. Made in England. Current Rebreather/s: Inspiration Classic Azimuth Other Rebreather/s: Azimuth Join Date: Nov 2005 Location: Viale C.Colombo 75 Marina di Carrara. MS 54036 Italy Posts: 575	Re: Replacement serrated lockwasher 4 Howell BOV? Quote: (Originally Posted by Mdemon) Since we're in a hi-jacking mode, it's a shame Bob's website is no more. If someone could send me them, and his permission, I'd be happy to host them. In fact Stuart probably would too... I wish I could help with the serrated thing - I have a Bob DSV myself. I'll be watching in interest to see what you come up with. Brent, any chance of doing a full tear-down article on it? IDEM! __________________ If it aint broke....don't fix it, and if it is.............well......get another one! divechief2000@hotmail.com
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2nd March 2006, 06:10	#9 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Re: Replacement serrated lockwasher 4 Howell BOV? I think the whole execution of using a serrated stainless steel washer with teeth impinging upon Delrin style of plastic is an inferior way of retaining the round protrusion up into the the upper DSV valve body. The plastic is just too soft to keep a good, consistent tension on the plastic and keeping the o-ring in between the two bodies in a proper compression If I had full access to it all and had 8 octopus arms, maybe I could spring enough of the teeth upwards to remove it and get to that 0-ring underneath without damaging the serrated tooth washer. I think those serrate steel toothed washers are designed to be pushed down once, then cut out and replaced. Bob must have delt with this issue, but nobody seems to know how to get a hold of him...... In retropsect, I don't think any of this needs to swivel at all.....The Cis unit had a fixed horizontally aligned 2nd stage diaphragm and this made the unit more streamlined.....
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2nd March 2006, 06:17	#10 (permalink)
RebreatherDave Maximum **** Current Rebreather/s: Inspiration Classic Other Rebreather/s:** Join Date: May 2005 Location: L.A., where the debris meets the sea Posts: 226	Re: Replacement serrated lockwasher 4 Howell BOV? As an update, I have determined that the correct name for that style of lock washer is a "metric internal tooth lock washer" When I have a chance I am going to disassemble my Howell OC/DSV and measure with a metric digital caliper the round portion that protrudes up into the upper body and is gripped by the lock washer. Once I get a metric equivalent and washer thickness dimension and approximate tooth count I will start searching the Internet for that size..... What a hassle of a lousy 50 cent washer!
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