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Is the piston supposed to spin freely?

W

Wardner

Well-known Member
This is the second IH tie-rod cylinder I have taken apart recently. The aluminum pistons on both piston rods spun freely.

On the first one, I inserted an o-ring in the piston counterbore and squashed it when tightening the friction-fit rod nut.

Seems like there would be leakage through the piston without the o-ring. There is no o-ring in the parts book. Perhaps the nuts just loosened or maybe the pistons should rotate.

Did I do the right thing?
p50956.jpg
 
Tight is the answer If there is a step on the shank, I would use shims to assure it was tight. Metal to metal. Jim
 
It wasn't until I looked at that picture that I realized I have another bent rod. Thought it might be camera distortion at first. Put a 6" straight edge on it and found about a .020" gap in the middle. I have a bunch of extra IH cylinder parts. One of them is a straight rod with eyelet. Think it came out of a 240 Fast Hitch.

Bent rods do make a difference. The internal portions of the head casting can break and send iron crumbles to the reservoir. The bent hydraulic cylinder I got from Marty2374 had internal problems. I'll be using the barrel on that cylinder as the current one had some rust pits where the piston was stopped.

There are several heads, yokes, and rods that will interchange on the IH tie-rod cylinders. I usually have to swap parts to get a cylinder that will fit my custom applications. Someday, the next owner will be scratching his head.

Ya, I will install an o-ring. That should eliminate any internal leakage and cylinder settling over an extended period.
 
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