---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sat 02/19/11: 13 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:54 AM - Yak 52 Air Leaks (bcbcbc) 2. 12:48 PM - Re: Yak 52 Air Leaks (Eric Wobschall) 3. 01:16 PM - Re: Yak 52 Air Leaks (T A LEWIS) 4. 01:37 PM - Re: Yak 52 Air Leaks (bcbcbc) 5. 03:05 PM - Re: Re: Yak 52 Air Leaks (KingCJ6@aol.com) 6. 03:22 PM - Re: Yak 52 Air Leaks (bcbcbc) 7. 05:38 PM - Re: Yak 52 Air Leaks (Vic) 8. 05:44 PM - Re: Re: Yak 52 Air Leaks (Eric Wobschall) 9. 06:16 PM - Re: cnc cutting for inst panel (keithmckinley) 10. 07:17 PM - Re: Yak 52 Air Leaks (Vic) 11. 09:41 PM - Re: Yak 52 Air Leaks (Hank Gibson) 12. 09:46 PM - Re: Yak 52 Air Leaks (Eric Wobschall) 13. 11:40 PM - Re: cnc cutting for inst panel (CJ6XXK) ________________________________ Message 1 _____________________________________ Time: 11:54:50 AM PST US Subject: Yak-List: Yak 52 Air Leaks From: "bcbcbc" Hello all, my Yak has a bleed down air leak that takes about 2 days, thus making it hard to detect. I've replaced the opo off valve piston and the air filler check valve. The main air shutoff valve has been checked good. Thus the leak is between the air filler check valve and the main air shutoff valve. That seems to only leave air lines and B nuts and perhaps flared tube end cracks. Has anyone else had a slow leak, what did you do, and what turned out to be the problem, so I can intelligently hone in on what the problem might be, instead of tearing everything apart. I can still fly alright since the compressor overcomes the slow leak, but I'd like to see that main air gage park itself at 40 or 50. The emergency side is tight as a drum. Thanks all. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331551#331551 ________________________________ Message 2 _____________________________________ Time: 12:48:35 PM PST US Subject: Re: Yak-List: Yak 52 Air Leaks From: Eric Wobschall Those problems can be pesky, but since it doesn't appear to be leaking in, try slathering all fittings, etc. with soapy water. On Feb 19, 2011, at 2:51 PM, bcbcbc wrote: > > Hello all, my Yak has a bleed down air leak that takes about 2 days, thus making it hard to detect. I've replaced the opo off valve piston and the air filler check valve. The main air shutoff valve has been checked good. Thus the leak is between the air filler check valve and the main air shutoff valve. That seems to only leave air lines and B nuts and perhaps flared tube end cracks. Has anyone else had a slow leak, what did you do, and what turned out to be the problem, so I can intelligently hone in on what the problem might be, instead of tearing everything apart. I can still fly alright since the compressor overcomes the slow leak, but I'd like to see that main air gage park itself at 40 or 50. The emergency side is tight as a drum. Thanks all. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331551#331551 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 01:16:04 PM PST US From: T A LEWIS Subject: Re: Yak-List: Yak 52 Air Leaks i have found that kid's bubble mix works well when applied with a small paint brush . terry lewis ----- Original Message ---- From: Eric Wobschall Sent: Sat, February 19, 2011 3:45:22 PM Subject: Re: Yak-List: Yak 52 Air Leaks Those problems can be pesky, but since it doesn't appear to be leaking in, try slathering all fittings, etc. with soapy water. On Feb 19, 2011, at 2:51 PM, bcbcbc wrote: > > Hello all, my Yak has a bleed down air leak that takes about 2 days, thus >making it hard to detect. I've replaced the opo off valve piston and the air >filler check valve. The main air shutoff valve has been checked good. Thus the >leak is between the air filler check valve and the main air shutoff valve. That >seems to only leave air lines and B nuts and perhaps flared tube end cracks. >Has anyone else had a slow leak, what did you do, and what turned out to be the >problem, so I can intelligently hone in on what the problem might be, instead of >tearing everything apart. I can still fly alright since the compressor >overcomes the slow leak, but I'd like to see that main air gage park itself at >40 or 50. The emergency side is tight as a drum. Thanks all. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331551#331551 > > > > > > > > > > ________________________________ Message 4 _____________________________________ Time: 01:37:39 PM PST US Subject: Yak-List: Re: Yak 52 Air Leaks From: "bcbcbc" Excellent advice !!! I figured that would be the next step, and rather simple to do at that. Thanks for the prompt replies. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331558#331558 ________________________________ Message 5 _____________________________________ Time: 03:05:52 PM PST US From: KingCJ6@aol.com Subject: Re: Yak-List: Re: Yak 52 Air Leaks An ultrasonic leak detector is the best way to go. One can aim it or just have it in the proximity of a small leak and it will sound like a raging river. Good for areas you can't access and observe soapy water. About $100 on E-Bay. Dave In a message dated 2/19/2011 1:37:51 P.M. Pacific Standard Time, ghostemail@verizon.net writes: --> Yak-List message posted by: "bcbcbc" Excellent advice !!! I figured that would be the next step, and rather simple to do at that. Thanks for the prompt replies. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331558#331558 ________________________________ Message 6 _____________________________________ Time: 03:22:42 PM PST US Subject: Yak-List: Re: Yak 52 Air Leaks From: "bcbcbc" Another great idea. Thanks very much !!! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331562#331562 ________________________________ Message 7 _____________________________________ Time: 05:38:35 PM PST US Subject: Yak-List: Re: Yak 52 Air Leaks From: "Vic" Hello, dont forget to check the lines to the manometer, they are rubber hoses in the 18 T, dont know about 52s. These hoses may be awkward to replace, so we had a leak there due to old age of the rubber. And yes, we had a develloping fracture in a pipe as well. Each time we could locate the problem by just listening carefully in a quiet hangar. A pressure system drop to zero in two days is quite a few gallons per hour. So Isuggest you take a torch and listen carefully in the still of the night. Not knowing your age I would have advised to take a younger person with you for the job, but then a veteran of the techno generation would be quite useless at that. Good luck with that one cheers Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331573#331573 ________________________________ Message 8 _____________________________________ Time: 05:44:29 PM PST US Subject: Re: Yak-List: Re: Yak 52 Air Leaks From: Eric Wobschall I can still hear Led Zepelin when it's quiet. On Feb 19, 2011, at 8:35 PM, Vic wrote: > > Hello, > > dont forget to check the lines to the manometer, they are rubber hoses in the 18 T, dont know about 52s. These hoses may be awkward to replace, so we had a leak there due to old age of the rubber. And yes, we had a develloping fracture in a pipe as well. Each time we could locate the problem by just listening carefully in a quiet hangar. A pressure system drop to zero in two days is quite a few gallons per hour. So Isuggest you take a torch and listen carefully in the still of the night. Not knowing your age I would have advised to take a younger person with you for the job, but then a veteran of the techno generation would be quite useless at that. > Good luck with that one > cheers > Vic > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331573#331573 > > > > > > > > > > ________________________________ Message 9 _____________________________________ Time: 06:16:10 PM PST US Subject: Yak-List: Re: cnc cutting for inst panel From: "keithmckinley" NICE! -------- Keith McKinley 700HS KFIT Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331579#331579 ________________________________ Message 10 ____________________________________ Time: 07:17:33 PM PST US Subject: Yak-List: Re: Yak 52 Air Leaks From: "Vic" Hey, Led Zeppelin tinnitus is quite allright ( though it does not help with the diagnosis for pneumatics ) ! cheers Vic Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331586#331586 ________________________________ Message 11 ____________________________________ Time: 09:41:12 PM PST US From: Hank Gibson Subject: Re: Yak-List: Yak 52 Air Leaks Don't forget the gear and flap handles;- any and all can be the culprit; - Leaking rear gear handle is common.- Also, all four of your actuators (3 gear, 1 flap) can have leak-past internally.- Doug overhauled all of mine and it helped.- Finally, your two brake valves (reducing and differe ntial) can go bad and be a source of leakage.- The Chinese made up overha ul kits for all these air system valves and tear them down every 100 hours I believe.- Doubt many of us do that...- Hank Gibson 904-738-3240 Mobile 904-213-1760 Home hkgibby@yahoo.com hkgibson@fnf.com - --- On Sat, 2/19/11, bcbcbc wrote: From: bcbcbc Subject: Yak-List: Yak 52 Air Leaks Hello all, my Yak has a bleed down air leak that takes about 2 days, thus m aking it hard to detect.- I've replaced the opo off valve piston and the air filler check valve.- The main air shutoff valve has been checked good .- Thus the leak is between the air filler check valve and the main air s hutoff valve.- That seems to only leave air lines and B nuts and perhaps flared tube end cracks.- Has anyone else had a slow leak, what did you do , and what turned out to be the problem, so I can intelligently hone in on what the problem might be, instead of tearing everything apart.- I can st ill fly alright since the compressor overcomes the slow leak, but I'd like to see that main air gage park itself at 40 or 50.- The emergency side is tight as a drum.- Thanks all. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331551#331551 le, List Admin. =0A=0A=0A ________________________________ Message 12 ____________________________________ Time: 09:46:28 PM PST US From: Eric Wobschall Subject: Re: Yak-List: Yak 52 Air Leaks shuttle valves, too On Feb 20, 2011, at 12:37 AM, Hank Gibson wrote: > Don't forget the gear and flap handles; any and all can be the culprit; Leaking rear gear handle is common. Also, all four of your actuators (3 gear, 1 flap) can have leak-past internally. Doug overhauled all of mine and it helped. Finally, your two brake valves (reducing and differential) can go bad and be a source of leakage. The Chinese made up overhaul kits for all these air system valves and tear them down every 100 hours I believe. Doubt many of us do that... > > Hank Gibson > 904-738-3240 Mobile > 904-213-1760 Home > hkgibby@yahoo.com > hkgibson@fnf.com > > > > --- On Sat, 2/19/11, bcbcbc wrote: > > From: bcbcbc > Subject: Yak-List: Yak 52 Air Leaks > To: yak-list@matronics.com > Date: Saturday, February 19, 2011, 2:51 PM > > > Hello all, my Yak has a bleed down air leak that takes about 2 days, thus making it hard to detect. I've replaced the opo off valve piston and the air filler check valve. The main air shutoff valve has been checked good. Thus the leak is between the air filler check valve and the main air shutoff valve. That seems to only leave air lines and B nuts and perhaps flared tube end cracks. Has anyone else had a slow leak, what did you do, and what turned out to be the problem, so I can intelligently hone in on what the problem might be, instead of tearing everything apart. I can still fly alright since the compressor overcomes the slow leak, but I'd like to see that main air gage park itself at 40 or 50. The emergency side is tight as a drum. Thanks all. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=331551#331551 > > > > > > > > > > > > ________________________________ Message 13 ____________________________________ Time: 11:40:58 PM PST US Subject: Yak-List: Re: cnc cutting for inst panel From: "CJ6XXK" Hi How did you go pressing the sides over? What size material did you use. If someone can get me a CAD file or dimensions i will draw them up and cut some. I am also going to do the fuel filler covers as well that i will send to Doug Sapp so he can supply them to all. Daniel Read this topic online here: http://forums.matronics.com/viewtopic.php?p=331595#331595 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.