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Date: Tue, 11 Jul 2006 12:13:14 -0400
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From: Alain NOIREAUX <alainoireaux@club-internet.fr>
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Subject: Re: [LML] Re: Sticky landing gear and brake hydraulics
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Lorn H Olsen a écrit :

>> From: "Charles R. Patton" <charles.r.patton@ieee.org>
>>
>> In the middle of this year’s annual on a LNC2 (N360JM) and I have  
>> two questions.
>>
>> 1) The plane is on jacks and when I run the free-fall gear test, it  
>> stops before the overcenter link finishes. Pulled the bolt on the  
>> over-center link and all indications are that the Matco hydraulic  
>> cylinder is sticking as everything else swings very free.
>
>
> I believe that you are talking about the activators. As far as I  
> know, Matco doesn't make activators. Matco makes brakes and brake  
> cylinders.
>
> If, as I suspect, you are talking about the main wheels, yawing the  
> aircraft in flight will lock the main gear in place. Is your  
> overcenter spring in good condition?
>
>> The kit was started in ‘91 and started flying in ‘99. I changed out  
>> the hydraulic fluid last year during the annual (the pump plastic  
>> tank was splitting.) and used new bulk fluid, type 41, from  Aircraft 
>> Spruce. Do the cylinder seals go bad around this time  frame on 
>> Matcos? If so, can I get just the elastomer parts and  rebuild myself 
>> or is it a factory job only?
>>
>> 2) In a similar vein, it appears the Matco brake pucks are also  
>> sticking. So same question – do they tend to go bad around this  time 
>> frame?
>
>
> Because they angle when applied, the pucks must be changed before  
> they are completely worn out. I changed to Grove wheels last year and  
> have not had to change my tires or brake pads yet. Grove can be  
> reached at: http://www.groveaircraft.com/
>
>> Thanks,
>> Charles Patton
>
> -- 
> Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
> 248-345-0500, mailto:lorn@dynacomm.ws
> LNC2, O-320-D1F, 1,200 hrs, N31161, Y47, SE Michigan
>
>
>
> -- 
> For archives and unsub http://mail.lancaironline.net/lists/lml/
>
>
When I had a leak at a hydraulic main gear actuator,5 years ago,I 
obtained a set of seals from MATCO . I put the new seals in place in the 
leaking hydraulic cylinder and the problem was solved ./ /I have the 
reference of the set of seals somewhere,but I don't find it on the 
spot.But ask Matco for hydraulic cylindres for LNC2,as I did,and they 
should know what you are asking for.
Alain NOIREAUX   L 320   F-PSDV/ /