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Stinson 108-3 Brake Master Cylinder Field Approval

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Jonny
(@jonnysouthwindglobal-com)
Active Member
Joined: 11 months ago
Posts: 7
Topic starter  

Hey All,

We have a Stinson 108-3 that has the original Scott Brake Master Cylinders. We are in the process of completely redoing the brake system and are installing the Cleveland Brake conversion kit. 

 

Have any of you done or known of a Field Approval for updated Brake Master Cylinders?

 

Thanks,


   
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Carsten H.
(@carl)
Estimable Member
Joined: 4 years ago
Posts: 129
 

I converted to Clevelands years ago. What an improvement! The original master cylinders work well with the conversion. They have been trouble free.


   
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STEVEN
New Member
Joined: 5 years ago
Posts: 2
 

The original master cylinders work well with the conversion.  The serrated shaft for parking brake application works better than the smooth shaft applications that came later. You will have great difficulty attaching 1/4" flex hose to any other master cylinders in that position.  The 1/8" steel, wound like springs, lines clean up very well.  They have male threaded ends silver soldered onto them and that was the Stinson standard then but not now.   


   
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Jonny
(@jonnysouthwindglobal-com)
Active Member
Joined: 11 months ago
Posts: 7
Topic starter  

@bec18108 

I am hoping a 45 or 90 ° AN fitting will work well to aid with the mat set cylinder install. We are just in the planning stages and talking with our local FSDO. Our plan is to us late 70’s 172 master cylinders. 
We are converting the brake assemblies to Cleveland per the Stinson drawing but will have to replace our master cylinders as well because of broken internal parts. 


   
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Carsten H.
(@carl)
Estimable Member
Joined: 4 years ago
Posts: 129
 

The original master cylinders had few internal parts. Can you elaborate on the broken parts? Thanks.


   
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Jonny
(@jonnysouthwindglobal-com)
Active Member
Joined: 11 months ago
Posts: 7
Topic starter  

@carl 

Sure!

We are doing a complete rebuild but there is a spring washer that was broken and we cannot acquire it or one of the seals (I don’t recall which seal). 

When it came down to it we liked the idea of being able to easily source parts.

Our goal is a full restoration of the aircraft and enjoy it for awhile then sell it. We want the person who buys it to have the best experience, when the aircraft needs maintenance, they can. 


   
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Carsten H.
(@carl)
Estimable Member
Joined: 4 years ago
Posts: 129
 

Contact Earl Allen , - located Cottonwood, CA 96022 United States • Telephone:  530 368 2064 ... He should have the parts you need.


   
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Jonny
(@jonnysouthwindglobal-com)
Active Member
Joined: 11 months ago
Posts: 7
Topic starter  

@carl 

Thank you!


   
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