Qustion on IH remote stroke control hydralic cylin

I had several of those on my farm some 3.5 and some 4.5 and also had a few of the others. In 25 years I never had one of those IH stroke control cylinders apart, and they were being used on heavy equipment like 20'disk, 25' cultivator, etc. Excellent quality.

The question I always had about those cylinders is what happens when you have internal bypassing within the cylinder. I've bought off the shelf after market 4" bore cylinders that started internal bypassing after couple years of use. I've also had rams bend on those cheap cylinders. In 25 years of use, some of it quite severe service, I've never had one of those IH stroke control cylinders bypass internally, nor have I ever bent a ram or broke a yoke.

I had close to a dozen implement cylinders in my farming days, and nothing measured up to those IH cylinders. One thing that IH did get right. Having said that, I believe Deere built a cylinder of their own that was of equal quality. There has also been a lot of junk on the market, believe me, I've compared notes with farmer users.

Modern hydraulic systems like the one in your Oliver 1755 are supposed to have a built-in relief valve to prevent damage.

Even if you hold the hydraulic lever down after the cylinder hits its end of stroke (or the stop pin), you can't break anything. You will hear a squealing noise coming from inside the tractor when the relief valve activates.

Even old tractors like Hs and Ms have relief valves inside the belly pumps.

Gene