Brittain servo hoses.

[markejackson02]

Reinstalled the overhauled servos. Three of four are fine. In the left wing the tubing will not stay attached to the servo. On the other three hoses, there appears to be some sort of white plastic that forms a lip which the compression fitting then holds in place. It is not there on the left tube. Does anyone know what this stuff is?  It is definitely not Teflon or tape. 

[Mooneymite]

Do you see what you're talking about in this picture?  It's my box of spare chit.....

[tony]

When I needed those fittings the only place I could find them was from Brittain. I think they are a couple of dollars a piece and they stock them. 

[N601RX]

It's poly-flow tubing. Spruce sells the brass fitting for it. Some local hardware/heavy truck stores have them also. 

[carusoam]

In the process equipment business the piece that is on the hose is part of the compression fitting.

the name of that part is a Ferrel, feral (forgot how to spell it).

Somebody has knowingly removed that part(?) and now you need to get a new one to put it back. Trim off the tubing that was used with the previous part. It's surface has probably been affected as well.

It is probably a standard part, like somebody said above.  The compression part of these type of fittings may get compressed to the tube and are not usually reusable when removed.

Fortunately they are low cost. And most likely readily available...

best regards,

-a-

[Two Oh One]

Sounds like you're describing a ferrule indeed.

[markejackson02]

Do you see what you're talking about in this picture?  It's my box of spare chit.....

yes it's the little white thing at the end of the hose directly in the center of the picture. 

[markejackson02]

Sounds like you're describing a ferrule indeed.

see. I learn something new every time I touch the plane. :-)

thanks

[Hank]

Mark, the white bands in the red and green tubes in the center if the photo are ferrules, part of the brass compression fitting. Check your local industrial supply house, or call Brittain. Quick, easy, inexpensive.

[Mooneymite]

yes it's the little white thing at the end of the hose directly in the center of the picture. 

If you can't find it locally, let me know.  I'll send you one.

 

 

[MyNameIsNobody]

I fail to understand...even for CB's why you would not get these from Brittain in Tulsa.  They are not expensive.  Why not support the OEM instead of your local hardware store on these parts?

[Andy95W]

I fail to understand...even for CB's why you would not get these from Brittain in Tulsa.  They are not expensive.  Why not support the OEM instead of your local hardware store on these parts?

Hmmm... I may lose my CB status, but Scott has a point...

[carusoam]

Another thing about compression fittings...

It is best to NOT mix the ferrule of one manufacturer with the 'nut' from a different manufacturer.  They may have different dimensions that won't seal properly or stay sealed over time.

I can see that a person may want to use the old nut and try to replace the missing ferrule to maintain the look of all the parts in the system.  It would be a bad idea to mix parts in the compression fittings.  And... Ferrules are not usually re-usable because they deform when compressed.

hope this helps somebody,

-a-

[markejackson02]

Talked to Brittain.  They changed the part color from white to black.  So they did ship it with the overhauled servos.  I did try again but the hose pulls out easily.  Gonna take pcitures so I can make sure I'm installing it correctly.

Edited October 21, 2015 by markejackson02
new information

[markejackson02]

Well, turns out I was installing the parts correctly, it is just that the old hose is basically crumbling.  So now have to think about pulling all new hoses.  What I get for buying a 40 year old plane :-)

As an aside, I can't say enough about how helpful and nice the folks at Brittain have been.  Fast turnaround on everything, answered all my questions, and provided scads of documents for free.

[yvesg]

Brittain's folks rock! They helped me get my retractable step boot overhauled and the wing leveler back inline a few years ago. I did my 2 year IFR  renewal Saturday and the inspector was quite surprised how well this thing behaved when I turned it on. It allowed me to focus on my climbs settings after being cleared higher while under the hood. I always use it when flying in clouds.

Yves