The fittings are in pretty bad shape on the outside, rusted. I noticed that on some sides less rust and a letter on the bottom. Out of the many fittings I was able to clean and put together the stamping on the bottom. It says
"Stratoflex 6 2 WIR"
I got excited hoping to find the specs and true recommended hose for the type but it must be so old nothing comes up except that it's a Parker thing.
I wish these machines could speak. I'd sit for hours listening to the stories this backhoe could tell. One day I'll show you all the welded patches it has. But here, for now look at this cylinder fittings. Clearly it's been outside for years.
You think that's bad? I thought so too, until I saw this one.
No wrench or pipe wrench could bite into what was left of that fitting. Some heat and chisel action got it moving.
@Eugen the piping that runs the far end of the cylinder is a slip fit. The spring keeps the piping seated at the other end of the cylinder. There will be O-rings on both ends of the pipe.
thebuildist wrote: ↑Mon Apr 03, 2023 3:31 pm
Any chance you can measure those thread pitches for me? I might need to manufacture a couple of those wiz-bang things.
Bob
Here you go. The thread on the inside of the sleeve is left handed, and is not 60 degrees even, it is oriented like pike teeth to bite into the hose so it does not pull out easy. The depth of that thread seems to be 0.05.
99F05F5F-0918-42C1-AD13-8BB9A01DAEE9.jpeg
You, sir, are a gentleman and a scholar!
Btw that's called a "buttress" thread.
Bob
Here's a mold of the inner biting thread using play dough.
CD4BC2B5-5C48-41E1-B0CE-CEC48DC1458D.jpeg
"Never be afraid to try something new. How hard can it be?"
Got two 44" pieces of new hose and put one of the fittings on for test. Didn't go easy, had to use quite some strength to screw it on. This is promising.
Hose gets screwed CCW into the ferrule.
Then inner piece screwed on. Had to push really hard until it reached threads.
Congrats on getting the re-usable fittings to work @Eugen Looks Great! - It was my experience that leaving a tiny gap (1mm - 1/16") between the end of the hose and the inside of the fitting where it bottoms out gives the hose a little room to expand when the insert is being screwed in and some lube on the inner fitting can help too...
'68 Case 195, '84 Case 446, '88 Ingersoll 222 - and 1965 Case 530ck (fullsize backhoe)
let's go, it's finally time to blow. 
