Today's Message Index:
----------------------
1. 04:40 AM - Re: YAK18-T AD'S (Rob Rowe)
2. 01:11 PM - Re: YAK18-T AD'S (alayunt)
3. 02:41 PM - Re: Emergency Tank leak? (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
4. 03:37 PM - Re: Emergency Tank leak? (Mark Davis)
5. 04:59 PM - Re: Emergency Tank leak? (skidmk)
6. 08:01 PM - Re: Re: Emergency Tank leak? (Walter Lannon)
Message 1
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| Subject: | Re: YAK18-T AD'S |
Alp,
Rob Kent has left Russian Engineering ... from their web site the new stores manager
is Alfonz Liska, +44 1628 829165, parts@wlacrussianeng.co.uk
Rob Rowe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0385#200385
Message 2
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| Subject: | Re: YAK18-T AD'S |
Dear friends,
Thank you very much for your assistance.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0504#200504
Message 3
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| Subject: | Emergency Tank leak? |
Mike, if you are pumping up to 60 Atmospheres in the main and 70
atmospheres in the emergency tank you are running just about 300 PSI
beyond maximum recommended pressure in your system.
DO NOT FIX THE LEAK!
Have a qualified mechanic set the pop-off valve so it will simply NOT
develop over 50 Atmospheres.
After you have done that, continue to try finding the leak.
Continuing to allow that kind of system pressure is very simply....
Irresponsible. Not only is your safety at risk, but also those that
may be in the immediate vicinity of the aircraft.
Although unsolicited really, here is another thought. Compressed air
can be dangerous. 1000 psi of compressed air can actually slice right
through human skin and into the soft tissue. Anyone who works with and
troubleshoots this kind of pressure in the military has to be CERTIFIED
to do so. Since you had no idea how dangerous 70 atmospheres is, it is
conceivable that you have no experience working with high pressure air
either.
Sometimes the "right thing to do" is to hire a certified mechanic to do
the job. Sometimes it is also the legal thing to do as well. Think it
over carefully. At the very minimum, if you attempt repairs of this
nature, it should be done under the direct supervision on an A&P. Not
an "inspection after the fact".
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of
cjpilot710@aol.com
Sent: Friday, August 22, 2008 10:11 PM
Subject: Re: Yak-List: Emergency Tank leak?
The gage is one spot but there is also a check valve on the forward fire
wall that could be leaking. The rubber pad on the end of the brass cup
can become hard and crack. With your compressor working fine and
building up pressure though that check valve but once your compressor
shut down, the air is held in the emerg tank by that check valve.
In a message dated 8/22/2008 6:21:54 P.M. Eastern Daylight Time,
KingCJ6@aol.com writes:
If it's not the tank, lines to/from, valve etc., check the
gauge. Our's had a leak where the inlet fitting attached to the back
some years ago.
In a message dated 8/22/2008 3:04:34 P.M. Pacific Daylight Time,
bourgem@cia.com writes:
<bourgem@cia.com>
Hello all,,,
went out to the cj the other day and the emerg tank is
at zero. The main tank has 40atms... but bleeds down fairly rapidly
once I open it and if the engine is not running.
With the engine running, I easily pump up to 60 in the
main, and almost 70 in the emerg tank.
Ideas as to where the emerg tank maybe leaking?
thanks
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199982#199982
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Message 4
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| Subject: | Re: Emergency Tank leak? |
As I recall the "sea stories" from my younger days, boiler technicians on
Navy ships hunted for steam leaks on 600 psi systems with broom sticks.
When the end of the broomstick lopped off, you knew you were in the right
area!
Mark Davis
N44YK
----- Original Message -----
From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E"
<mark.bitterlich@navy.mil>
Sent: Monday, August 25, 2008 3:40 PM
Subject: RE: Yak-List: Emergency Tank leak?
> MALS-14 64E" <mark.bitterlich@navy.mil>
>
> Mike, if you are pumping up to 60 Atmospheres in the main and 70
> atmospheres in the emergency tank you are running just about 300 PSI
> beyond maximum recommended pressure in your system.
>
> DO NOT FIX THE LEAK!
>
> Have a qualified mechanic set the pop-off valve so it will simply NOT
> develop over 50 Atmospheres.
>
> After you have done that, continue to try finding the leak.
>
> Continuing to allow that kind of system pressure is very simply....
> Irresponsible. Not only is your safety at risk, but also those that
> may be in the immediate vicinity of the aircraft.
>
> Although unsolicited really, here is another thought. Compressed air
> can be dangerous. 1000 psi of compressed air can actually slice right
> through human skin and into the soft tissue. Anyone who works with and
> troubleshoots this kind of pressure in the military has to be CERTIFIED
> to do so. Since you had no idea how dangerous 70 atmospheres is, it is
> conceivable that you have no experience working with high pressure air
> either.
>
> Sometimes the "right thing to do" is to hire a certified mechanic to do
> the job. Sometimes it is also the legal thing to do as well. Think it
> over carefully. At the very minimum, if you attempt repairs of this
> nature, it should be done under the direct supervision on an A&P. Not
> an "inspection after the fact".
>
> Mark Bitterlich
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of
> cjpilot710@aol.com
> Sent: Friday, August 22, 2008 10:11 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Emergency Tank leak?
>
> The gage is one spot but there is also a check valve on the forward fire
> wall that could be leaking. The rubber pad on the end of the brass cup
> can become hard and crack. With your compressor working fine and
> building up pressure though that check valve but once your compressor
> shut down, the air is held in the emerg tank by that check valve.
>
> In a message dated 8/22/2008 6:21:54 P.M. Eastern Daylight Time,
> KingCJ6@aol.com writes:
>
>
> If it's not the tank, lines to/from, valve etc., check the
> gauge. Our's had a leak where the inlet fitting attached to the back
> some years ago.
>
> In a message dated 8/22/2008 3:04:34 P.M. Pacific Daylight Time,
> bourgem@cia.com writes:
>
> <bourgem@cia.com>
>
> Hello all,,,
>
> went out to the cj the other day and the emerg tank is
> at zero. The main tank has 40atms... but bleeds down fairly rapidly
> once I open it and if the engine is not running.
>
> With the engine running, I easily pump up to 60 in the
> main, and almost 70 in the emerg tank.
>
> Ideas as to where the emerg tank maybe leaking?
>
> thanks
>
> --------
> Mike "Skidmk" Bourget
> Ottawa, Ontario
>
>
> Read this topic online here:
>
>
> http://forums.matronics.com/viewtopic.php?p=199982#199982
>
>
> ________________________________
>
> It's only a deal if it's where you want to go. Find your travel
> deal here
> <http://information.travel.aol.com/deals?ncid=aoltrv00050000000047> .
>
>
> ="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/
> Navigator?Yak-List
> .matronics.com/">http://forums.matronics.com
>
> ://www.matronics.com/contribution">http://www.matronics.com/contribution
>
>
> ________________________________
>
> It's only a deal if it's where you want to go. Find your travel deal
> here <http://information.travel.aol.com/deals?ncid=aoltrv00050000000047>
> .
>
>
> --
> Checked by AVG.
> 7:05 AM
>
>
Message 5
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| Subject: | Re: Emergency Tank leak? |
Thanks all for all the replies. I chased the leak to the check valve on the firewall.
Its a good thing, cause the other check valve was about to go as well
(springs rusted).
Checked my stainless water filter, and I've order new deccessant... As soon as
this stuff arrives I'll adjust the relief valve.
Walt, I"ve looked in my parts manual to try to figure out where the other "water
filters" are. I cannot see them, the drawing is way to small.
Is there a better cj pneumatic system schematic available online somewhere.
M [Laughing]
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0570#200570
Message 6
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| Subject: | Re: Emergency Tank leak? |
Mike;
There is only one "water filter".
There are two deposit filters (snot valves). The main system valve on the
firewall should be drained after every engine operation. The brake system
valve in the lower centre section should be drained perhaps once per week or
as found necessary by experience.
The air system schematic is on page 104 of the Technical Specifications
Manual. It is small and the numbers are very hard to read but as far as I
know that is the only one. It is however quite accurate and if you are
attempting to fix these problems yourself you need to spend the time
necessary to identify all the components and fully understand the system.
I suspect you have more problems than one leaking check valve. You may be
well advised to discuss this with your AME and seek his help. You will need
facilities to calibrate the pressure gauges, an external source of medium
pressure air, jacks to raise the aircraft and many other items. There may
be leakage in the gear UP circuit. Or in the charging circuit from the
compressor to relief valve which cannot be tested without an external
supply.
As mentioned by others you most certainly need an understanding of the
dangers of working with high pressure air.
Cheers;
Walt
----- Original Message -----
From: "skidmk" <skidmk@gmail.com>
Sent: Monday, August 25, 2008 4:59 PM
Subject: Yak-List: Re: Emergency Tank leak?
>
> Thanks all for all the replies. I chased the leak to the check valve on
> the firewall. Its a good thing, cause the other check valve was about to
> go as well (springs rusted).
>
> Checked my stainless water filter, and I've order new deccessant... As
> soon as this stuff arrives I'll adjust the relief valve.
>
> Walt, I"ve looked in my parts manual to try to figure out where the other
> "water filters" are. I cannot see them, the drawing is way to small.
>
> Is there a better cj pneumatic system schematic available online
> somewhere.
>
> M [Laughing]
>
> --------
> Mike "Skidmk" Bourget
> Ottawa, Ontario
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0570#200570
>
>
>
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