Sources for hydraulic fittings, swivels and hoses?
 

IA informed me today that Cessna wants profane money for a single swivel fitting for the gear. What's your go-to for such things?

Hmmm...wonder what o-ring exactly would be used. I used to spend 1000 bucks to save 50 on my car brakes. Wouldn't complain if it were the other way around.

Thanks Frank!
 

Tips like this is why I love these forums!

Buy an O-ring assortment. It may set you back $25, but you'll never buy an o-ring again, and you'll always have just the one you need! You can test-fit until you find the exact o-ring. Works great for brakes too.

I'm not the first one to say it, but mechanics today have a "change the part" mentality rather than a "repair the part" mentality. One A&P/IA I know works on Challengers - he jokes that he and his crew don't actually "fix" anything, they just change out parts! And he's right!

I'm definitely intrigued by this, and wasn't kidding about the car brakes comment for that matter. There was always something incredibly satisfying about giving an old part new life. In this case, and in my ignorance, I would be concerned about picking an o-ring that was made of the wrong material, or just wasn't of the right makeup to withstand the friction, or any pressure or compression in there, or of course the brake fluid.

Definitely happy to learn something however.

The o-rings are MS28775-010 and MS28775-110. So easy an A&P can do it. Bench vise highly recommend to tap out the pins.

Thanks all--this is too tempting to not try. I'll report back.

The Parker store for JIC swivel fittings

Be sure to use “mil-spec“ o-rings 5606 compatibility

When viewing the picture on a computer, remove the "m." in the front of the URL, and you'll be directed to the regular site instead of the mobile site. Much higher resolution picture on the regular site!

Yep ... saw this, and it was much of what inspired me. My next question was, well, what material would be right for the application? Mr(s) slade has given a clue to this.

Any and all direction is (and has been) appreciated here.

What was the final solution for leaking brake swivel fitting? I now have one too. Who does overhaul? Or did you disassemble replace o rings and it is holding?

I believe two solutions were offered:

1. Rebuild it yourself with new o-rings

2. Buy a replacement swivel fitting from Parker for like $10 (non-aviation of course, but the exact same part pretty much).

Is there a part/model number for the fitting from Parker? I've been looking and don't see anything that has the mobility of the original part.

If you can remove it and take it into your local Parker store they can match it up or you could take a picture of it and send an email and let them take a shot. Hydraulics are hydraulics in a swivel fitting certainly is nothing new Under the Sun.

The cessna swivel is not readily replaced by a standard hydraulic swivel. On my attempt found most hydraulic swivels have motion in only one axis: axially, right angle etc. The OEM swivel can spin axially and flex in all manner of directions. So a non OEM swivel likely will put more stress on the hose. Also, non OEM swivel uses JIC threads and not AN threading. AN threading is what is on pass-through in landing gear. Similar but not exact. Could use some adapter/NPT threads, etc; gets clunky fast in a tight space with things rotating around.

I am going with rebuild of OEM.

Took the roll pins out but the swivel didn't just fall apart. There is a circular clip on mine holding a backup up plate behind the nipple. No easy way to access for removal. Also anticipate difficult to press back in place without constructing a tool. I see a witness hole about 1/16th inch in size that might give opportunity to get the circular clip out. However as I put increasing stress on things became worried about damaging a component I likely will have to reuse. If not source-able, would then be locked into purchasing a new swivel if desiring to stay OEM.

So, I've sent out for overhaul. RobAir in Washington State will rebuild and test for $500. Discovered fair amount of corrosion at internal o-ring mating areas which was resolved. With that, simply replacing o-rings myself if I had successfully taken it apart probably would not have worked and leaked still.

Just an update.

Thanks for the follow-up.

$500 for OH doesn't sound too terrible.

IF anyone has successfully repaired one of these on their own, please let us know.

Pictures would be golden. :)

I got an email from McFarlane Aviation and they are close to releasing a direct replacement for the swivels.