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McFly
Joined: 21 May 2012
Posts: 101
Location: Scottsdale, AZ
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mark.bitterlich(at)navy.m
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 Posted: Fri Feb 21, 2014 9:07 am Post subject: Yak 50 question |
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There are a number of articles in the archives that discuss the topic of pulling the gear retract cylinders. One of which I wrote. I've tried some of the other procedures, but have had mixed results.
If you want details, please contact me off-line at: markbitterlich(at)embarqmail.com or at work at: mark.bitterlich(at)navy.mil and I will talk to you in person about the pro's and con's.
To sum it up in one sentence, it is in my opinion best to pull the whole landing gear leg with cylinder attached, then it is to try to remove and replace the cylinder leaving the gear leg bolted in.
Second, be aware there is a SET SCREW in the spin on collars of this actuator. It could be hidden by paint of grease, but it is there! Without loosening this screw, you will ruin the actuator trying to take it apart.
Mark Bitterlich
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mikecavanagh1(at)hotmail.
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| Posted: Sat Feb 22, 2014 7:36 pm Post subject: Yak 50 question |
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Don't know about the 50 but I imagine it must be very similar to the 52. I have all three of mine out, one twice in the last 18 years. They are a bitch!! I disconnected the the actuators from the gear legs and disconnected the upper actuator attach bolts from the wing. On the 52 there is practically no access and I did it all with fingers alone. The upper attach bolt is secured with a castle nut and cotter pin. I was able to straighten the cotters with my fingers and then used an angled needle nose to pull the cotter pins, The castle nuts spun off by hand. You will have to do it all mostly by feel if it is anything like the 52. Not Fun. Good luck and it will improve your dexterity with magic tricks. Duck
Sent from my iPad
[quote] On Feb 21, 2014, at 11:10 AM, "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich(at)navy.mil> wrote:
There are a number of articles in the archives that discuss the topic of pulling the gear retract cylinders. One of which I wrote. I've tried some of the other procedures, but have had mixed results.
If you want details, please contact me off-line at: markbitterlich(at)embarqmail.com or at work at: mark.bitterlich(at)navy.mil and I will talk to you in person about the pro's and con's.
To sum it up in one sentence, it is in my opinion best to pull the whole landing gear leg with cylinder attached, then it is to try to remove and replace the cylinder leaving the gear leg bolted in.
Second, be aware there is a SET SCREW in the spin on collars of this actuator. It could be hidden by paint of grease, but it is there! Without loosening this screw, you will ruin the actuator trying to take it apart.
Mark Bitterlich
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| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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mark.bitterlich(at)navy.m
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| Posted: Mon Feb 24, 2014 7:48 am Post subject: Yak 50 question |
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The 50 is totally different. Access, gear locking mechanism, etc. All different. There are some common concepts (emergency gear blow down, etc.)
The biggest problem in the 50 is disconnecting the actuators from the gear legs. There is one bolt in particular that is almost impossible to get out. One procedure calls for an attempt to come in via an access cutout to get at it. I tried this, and it indeed can be done. But when it came to getting it back IN again, I simply could not do it, and neither could two A&P's present. One person on the list said it was "easy". I extend huge compliments to that gent.
As it turns out, you can spend a lot of time twisting and turning to pull get to the almost impossible access points necessary, or you can just drop the piece of fiberglass at the top of the gear, and pull the main gear attachment bolt out. Then the whole mess (gear leg and actuator) can come out in one piece and from there, it is a piece of cake.
So it's a choice.
Good luck.
Mark
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