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dsavarese0812(at)bellsout
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 Posted: Tue Sep 22, 2009 5:29 am Post subject: Remanufacturing Russian Check Valves |
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I am now able to remanufacture the Russian pneumatic system check valves using US manufactured parts. A remanufactured Russian check valve should now last indefinitely due to the quality of the component I am using internally in the original check valve. If interested, contact me off-list at dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net).
Dennis
A. Dennis Savarese
334-285-2141
334-546-8182 (cell)
Skype: yakworld1
www.yak-52.com
[quote][b]
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talew(at)bellsouth.net
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| Posted: Tue Sep 22, 2009 6:13 am Post subject: Remanufacturing Russian Check Valves |
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Hi Dennis,
Will the also replace the chinese valves?
Terry Lewis
From: A. Dennis Savarese <dsavarese0812(at)bellsouth.net>
To: yak-list(at)matronics.com; Yak-52-TW-Owners-Group(at)googlegroups.com
Sent: Tuesday, September 22, 2009 9:19:05 AM
Subject: Remanufacturing Russian Check Valves
I am now able to remanufacture the Russian pneumatic system check valves using US manufactured parts. A remanufactured Russian check valve should now last indefinitely due to the quality of the component I am using internally in the original check valve. If interested, contact me off-list at dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net).
Dennis
A. Dennis Savarese
334-285-2141
334-546-8182 (cell)
Skype: yakworld1
www.yak-52.com
[quote][b]http://www.matronics========================
forums.matronics.com/" rel=nofollow target=_blank>http://forums.matroni--> [b]
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dsavarese0812(at)bellsout
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| Posted: Tue Sep 22, 2009 6:21 am Post subject: Remanufacturing Russian Check Valves |
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Unfortunately, no they won't because the Russian check valves have the male M14 (the larger of the two size flare fittings) flare fittings whereas the Chinese check valves have 1/8 NPT female fittings. Doug has the newer and better Chinese check valves which don't corrode like the original ones with the steel balls in them. Plus Doug's prices for check valves are very reasonable whereas new Russian check valves, if you can find them, are approaching $350 + USD.
Dennis
[quote] ---
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dougsappllc(at)gmail.com
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| Posted: Tue Sep 22, 2009 8:29 am Post subject: Remanufacturing Russian Check Valves |
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Terry, Since we have gone to the new style stainless steel springs the Chinese check and diverter valves should have a very long life. Since going to the SS springs I have seen only a few problems, these problems were not from parts rusting/corroding but were from the incompatibility of the lube some guys are using in their pneumatic systems. Care should be taken to first use a compatible lube, and second, don't over do it. Read the manual, it tells you how much and where to introduce it. The wrong lube will attack/soften all the rubber parts, using to much will eventually wash away the high pressure grease in the actuators, leading to their early failure.
Always Yakin,
Doug
On Tue, Sep 22, 2009 at 7:13 AM, T A LEWIS <talew(at)bellsouth.net (talew(at)bellsouth.net)> wrote:
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
[quote][b]
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Wed Sep 23, 2009 11:39 am Post subject: Re: Remanufacturing Russian Check Valves |
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what is the correct lube?
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Wed Sep 23, 2009 11:39 am Post subject: Re: Remanufacturing Russian Check Valves |
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what is the correct lube?
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dsavarese0812(at)bellsout
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| Posted: Wed Sep 23, 2009 1:48 pm Post subject: Remanufacturing Russian Check Valves |
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Did I miss something? Correct lube for what Keith?
Dennis
[quote] ---
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Wed Sep 23, 2009 2:25 pm Post subject: Re: Remanufacturing Russian Check Valves |
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| dougsappllc(at)gmail.com wrote: | I have seen only a few problems, these problems were not from parts rusting/corroding but were from the incompatibility of the lube some guys are using in their pneumatic systems. Care should be taken to first use a compatible lube, and second, don't over do it. Read the manual, it tells you how much and where to introduce it. The wrong lube will attack/soften all the rubber parts, using to much will eventually wash away the high pressure grease in the actuators, leading to their early failure.
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Hi Dennis,
I was referring to Doug's comments in his follow on post.
Keith
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Noplugs
Joined: 27 Aug 2009
Posts: 35
Location: Houston, TX
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| Posted: Thu Sep 24, 2009 12:27 pm Post subject: Re: Remanufacturing Russian Check Valves |
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What I read was "All the parts in the working inner cavity should be smeared with No.10 Aviation hydraulic fluid or caster oil before assembly".
I assume that if it is used for assembly, its used for normal operations. I have not found out what "No.10 Aviation hydraulic fluid" converts to yet. So if anyone knows let me know.
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Thu Sep 24, 2009 3:44 pm Post subject: Re: Remanufacturing Russian Check Valves |
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Aircraft Hydraulic Fluid MIL-H-5606 is what I believe, but then again I was trying to get some more info as well.
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dougsappllc(at)gmail.com
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| Posted: Thu Sep 24, 2009 4:50 pm Post subject: Remanufacturing Russian Check Valves |
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5606 is great for the shock struts but I would not recommend using it to lube you pneumatic system.
Doug
On Thu, Sep 24, 2009 at 4:44 PM, keithmckinley <keith.mckinley(at)townisp.com (keith.mckinley(at)townisp.com)> wrote:
--
Douglas Sapp
Doug Sapp LLC
18B Riverview Road
Omak WA 98841
PH 509-826-4610
Fax 509-826-3644
[quote][b]
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Thu Sep 24, 2009 5:06 pm Post subject: Re: Remanufacturing Russian Check Valves |
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Doug what would you recommend to lubricate the system? btw It's been said that messing with the shock strut oil if there is no good service history is like messing with an automatic transmission with 150,000 miles on it that has never been serviced.
Seals start to go bad real quick.
Just what I've heard.
Keith
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mark.bitterlich(at)navy.m
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| Posted: Thu Sep 24, 2009 5:19 pm Post subject: Remanufacturing Russian Check Valves |
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FROM THE ARM CHAIR OF Mark Bitterlich:
Personally, I am not going to introduce anything into the pneumatic system of my YAK-50. I have heard a lot of stories about squirting this and that into the system to keep this and that from corroding. Anything from "light machine oil" to "pneumatic tool oil" to "hydraulic fluid" (original 5606 and the new synthetic types for example), etc., etc. Maybe 5606 is good... I really do not know.
ANYWAY..... I did it. I put pneumatic tool oil into my 50. The next thing I knew I had trouble with the pressure regulation. Turns out that when you get oil on the pop-off valve seal, it does not want to seal as well, and my pressure regulation went from 50 atmos, to about 35 atmos.
Next thing I knew, I blew the seals out of the landing gear actuators. That just sucks, and if you have never R&R'ed the landing gear actuators on a YAK-50, let me tell you it is not really a ton of fun. Then there is the matter of finding new seals. Maybe it was because mine were too old to begin with and just needed that to make them go bad. Who knows? I sure do not.
Bottom line, I think it is a better idea to pull the landing gear actuators every "so many years" and just replace those seals anyway, and when you have the mess taken apart, have it treated for corrosion, by any method you so choose. My personal opinion is simply that it is much easier to ruin the seals by adding "stuff" into the system than it is to have the darn things corrode to the point of failure. A rebuild every "X" number of years is possibly a better solution.
But,... it is very possible I am dead wrong. Regardless, I tried it, and will never do it again.
Mark Bitterlich
p.s. Adding a tiny amount of lubricant after a total rebuild to allow everything to go together and seat is another story. I'd use a DROP or two of castor oil. If that much.
________________________________
From: owner-yak-list-server(at)matronics.com on behalf of keithmckinley
Sent: Thu 9/24/2009 7:44 PM
To: yak-list(at)matronics.com
Subject: Re: Remanufacturing Russian Check Valves
Aircraft Hydraulic Fluid MIL-H-5606 is what I believe, but then again I was trying to get some more info as well.
--------
Keith McKinley
700HS
KFIT
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 64821#264821
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jan.mevis(at)informavia.b
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| Posted: Thu Sep 24, 2009 11:12 pm Post subject: Remanufacturing Russian Check Valves |
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The Russians add a few drops of 50/50 glycerine/ethanol to the landing gear
actuators before winter time. They used to have a special liquid in the
eighties, but it's impossible to find, even for them.I also am suspicious
because ethanol may attack rubber. But I don't know what kind of material is
used for the seals.
Anyway, a FEW drops, not half a liter.
Jan
YK50 RA2005K
--
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Noplugs
Joined: 27 Aug 2009
Posts: 35
Location: Houston, TX
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| Posted: Fri Sep 25, 2009 7:08 am Post subject: Re: Remanufacturing Russian Check Valves |
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I would not use 5606 or any other oil that is mineral based, because one of the oils in the manual said to use “Caster Oil” which is vegetable based oil. So I would think that the also referenced “#10 Hydraulic Oil” would also be a vegetable based oil. There are several of these Veggie based hydraulic oils available today. But we are back to square one “ which oil to use ”
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