Help please, how to open this hydraulic cylinder?

[amron]

Hi all
The cylinder shown on the attached pics is a mystery for me. I want to dismantle it, which seemed simple enough at first glance, but it turned otherwise.
as you can see, there is what seems to be a "locking nut" with the two holes that led me to believe that a key with two pins will turn and drive the nut out but to my surprise, the "nut" is turning (not easily, but it is turning) but doesn't come out. I was expecting that after turning it a few turns, it would come up a bit out on its thread, but unfortunately, it's not the case. could you offer any advise/ clue what did I made wrong and how should it be done? one more thing - I've checked and wire brushed the circumference of the cylinder in order to make sure that there is no locking/securing screw or pin - there is none.

 

[BukitCase]

It does seem strange that there are spanner holes but it doesn't appear to be threaded - only suggestion I can offer, is maybe the gland is held in by an inside snap ring - I think I'd set it up in a press, jig it so the press can push just the gland back into the cylinder (not much, maybe less than 1/4"), then blow all the crap out of that joint with air and see if there's a retaining ring of some sort -

Beyond that, no clue... Steve

 

[dragoneggs]

A couple things... first it appears that the protruding internally threaded 'nipple' is not in line with the cylinder (bent?). Second, looks like there are flats on the nipple. Have you tried unscrewing this? I should add that I am not a hydraulic expert... just looking and commenting on the pics you provided. Good luck!

 

[TMGT]

It might be a wire retained gland, is there a small notch on the side of the barrel near the top of the gland? If so does it have what looks like a square piece of metal in it? If so when you turn the gland enough in the correct direction the wire should "roll" out of the barrel releasing the gland which should just pull out.

 

[amron]

It might be a wire retained gland, is there a small notch on the side of the barrel near the top of the gland? If so does it have what looks like a square piece of metal in it? If so when you turn the gland enough in the correct direction the wire should "roll" out of the barrel releasing the gland which should just pull out.

Hi people and thanks for your comments. I'm a little bit concerned to apply pressure on the gland because I think that it may cause some damage if it's not the right method. as per TMGT's suggestion - I've not noticed any notch or sign on the cylinders body. is it possible that the gland should be turned clockwise (direction of tightening) in order for the wire to pull out? because I've turned it counterclockwise while attempting to unscrew it. as per Dragoneggs's suggestion - the flats are made to accept a wrench when an eyebolt or another accessory is attached to the piston rod (at least that's what it seems to me).
Thanx again.

 

[TMGT]

If it's a wire gland it could turn either way, the rod won't have any bearing on the gland.
Can you take any more pictures showing the sides of the barrel?

 

[Rocky J]

Is it like the one in this video link Locking Pin Hydraulic Cylinder - YouTube

 

[pmsmechanic]

I would just carefully tap the top end of the cylinder back in with a hammer and punch. Pretty sure there is a snap ring in there. Pull the snap ring out and then take the cylinder apart.

 

[DLTTrekkers]

That sq wire must come out. I can see that the benttip is broken off. So tap it clockwise and pull it out. I ones had a wire that I had to brake off piece by piece to get it out .

 

[crazyal]

I would try turning it the opposite direction. if it's threaded it should only go so far before not turning. It could be a very fine thread so use a straight edge to find out how far it is unscrewed and then check after a few turns to see if there's even the slightest movement.