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914 Servo Problem -- broken copper wiper -- is there a fix?

 
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budyerly@msn.com



Joined: 05 Oct 2019
Posts: 286
Location: Florida USA

PostPosted: Sat Mar 20, 2021 4:32 pm    Post subject: 914 Servo Problem -- broken copper wiper -- is there a fix? Reply with quote

Paul,
No, not this specifically.
I had a wiper wear through and begin to hesitate. $500 and I was flying again.
Check ebay as there are usually a few on there. Typically about $150-$250 and good for parts or sometimes good for a replacement. But check the part number.
The Skido Rotax 914 marine engine used the same servo but you don't normally see these for sale.

Best Regards,
Bud Yerly

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Gilles



Joined: 16 May 2020
Posts: 33

PostPosted: Tue Mar 23, 2021 2:43 pm    Post subject: 914 Servo Problem -- broken copper wiper -- is there a fix? Reply with quote

Le 21/03/2021 à 00:00, PCahill a écrit :

Quote:
Quote:
--> Europa-List message posted by: "PCahill" <cahillpa(at)gmail.com> (cahillpa(at)gmail.com)
Has anyone else seen this? Can I buy a gear with the copper wipers, or maybe just the wipers themselves? This happened suddenly: 2 weekends ago everything was perfect, last weekend -- blinking light. This weekend -- disassemble until problem found. I can't imagine that I'm the only one with what amounts to a potentiometer with a bad wiper. This is certainly not a $500 failure (cost of new servo). Thanks.



N914TX,

Interesting damage indeed ! Thanks for sharing.

The good news is, the servo is a motorcycle unit which can be bought new or second-hand for just a few bucks.

We got the info from an autogyro forum expert and bought one just to have a look. We may still have it somewhere.
If you're interested I could research the exact brand and model of motor bike.
FWIW
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Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr


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PCahill



Joined: 05 Feb 2018
Posts: 6

PostPosted: Tue Mar 23, 2021 5:33 pm    Post subject: Re: 914 Servo Problem -- broken copper wiper -- is there a Reply with quote

Gilles,

I think everyone on this list would benefit from knowing about an equivalent motorcycle servo for a lot less cash! I looked myself for such a part... no joy!

More information... Ronnie at www.flysmla.com is checking his stock of used servos. Perhaps he can provide me with a serviceable part.

I also understand now that there is a '912 914 buy sell trade' group on Facebook. I have not confirmed this, yet FB may be another good source of used parts.

More details... when I wrote "copper" wipers in my original post, I should have written "copper-colored" wipers. The wiper is likely a copper alloy, maybe Cu-Be, maybe Cu-Ni, maybe Cu-Ni-Sn, or maybe a thousand other possibilities. Therefore I am shying away from repair of the metal wiper itself.

Thanks!

Paul


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