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Author Topic: Hydraulic Cylinder Repair  (Read 23892 times)

imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #23 on: March 20, 2015, 07:06:51 PM »
Smaller cylinder than my 562!This has to be the way my cylinder comes apart (thanks for posting video) only after I heated up gland nut plus long wrench and cheater bar it didnt come out.I have been soaking the gland nut with pb blaster each day and will try this again this summer.
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #22 on: March 20, 2015, 06:58:21 PM »
Ran across this video of taking apart a Russian hyd. cyl.


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damengineer

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Re: Hydraulic Cylinder Repair
« Reply #21 on: March 19, 2015, 12:11:49 AM »
I know this is an older thread, but I think I might have something relevant.  I get most of my hydraulic repair parts from   http://www.baileynet.com/    I have a hose crimp machine and make my own hoses.   Also when I can use them, http://www.surpluscenter.com/  has surplus hoses for less than I can buy the hose and fittings.  They also have some adaptable cylinders and other hydraulic parts.   We have a company in OKC called Sealco   http://www.sealcompany.com/  where I get most of my sealing rings to repair my hydraulic cylinders.  I have bought a lot of the special spanners on Ebay to remove the end to rebuild them.    I just hate to pay a machine shop to do what I can do myself.   

I rebuilt the crowd cylinder on my 10B Caterpillar Excavator last summer.  I had to make a wrench to fit the nut on the end of the cylinder rod.  I drew it out on Autocad then printed the nut outline out on paper and used that for a pattern to cut the hex wrench from...  I cut it from 1/2 plate then welded it to a 6 ft piece of 2 7/8 drill stem, and then stuck an old railroad pry bar in the eye end of the rod and with everything on blocks, I used my front loader bucket to push the wrench and beak the nut loose.  Same way I tightened it.  I suppose that it was torqued to spec!???  I bent my railroad bar when I tightened it.  Really hated that, It was over 125 years old......

Just my $0.02
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #20 on: January 26, 2015, 12:11:04 PM »
This is good to know I have put my reseal job on hold still cant rotate this ring out.One problem is I have is I live 200m from a decent machine shop.Hdy shop here would not even help me out with hyd hoses said looks to oddball to him.So next month I will go to Denver I might have to buy complete cylinders and hoses.From weather channel looks like east coast will be getting major snow thanks again haymaker
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #19 on: January 13, 2015, 04:22:47 PM »
I hit something pretty hard in the snow when I was pushing snow with my "new" Quick Attatch hyd. angle snow blade.  The cast iron end of the cylinder has 2 ears on it that snapped right off!  This is the cylinder which angles the blade  to the left or right. I thought there would be some sort of pressure relief system so this doesn't happen but not on this model.  Thinking I may look into putting that on as I've seen other snow blades like this have that or some use 2 cylinders.
 
Anyway after some checking I found the USA made blade uses a hyd. cylinder made in Saskatchewan Canada.  So I talked to the manufacture of the cylinder and they hooked me up with the end piece for 32 bucks plus shipping.
 
This one comes apart possibly something like your loader cylinders .....  See the pics below. 
 
This one is simple and works pretty slick there is no threads to it.   All you do is lift the ring clip with a screw driver and it rotates  out. You can't just pull on the retaining ring, you have to rotate the whole cast end piece there.  As you do this the ring just comes on out on its own.  You can see the other end of the ring hooks into a hole in the casting there.  This cast end with the broke ears and the end the rod comes are both built the same way that uses the retaining ring system.   Once the ring is rotated out the end piece just slide right out of the tube.
 
 
« Last Edit: January 13, 2015, 04:37:51 PM by Haymaker »
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #18 on: December 29, 2014, 10:49:48 PM »
In the picture of the drawing( Number 23 is the tube) it shows what looks like a treaded tube Im thinking the gland nut is treaded along with the tube. I did run a center punch into the curl of the ring retainer then rotated the G/N plus yanked on the retainer with no luck today.What I do not want to do is add a cheater bar to the spanner wrench and then start pulling threads.Im not wanting to buy complete cylinders so Im on hold with this till I get time to call someone.

No you don't want to force the issue with the nut until you figure how that lock ring works or comes out. 
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #17 on: December 29, 2014, 09:54:17 PM »
In the picture of the drawing( Number 23 is the tube) it shows what looks like a treaded tube Im thinking the gland nut is treaded along with the tube. I did run a center punch into the curl of the ring retainer then rotated the G/N plus yanked on the retainer with no luck today.What I do not want to do is add a cheater bar to the spanner wrench and then start pulling threads.Im not wanting to buy complete cylinders so Im on hold with this till I get time to call someone.
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #16 on: December 28, 2014, 11:53:13 AM »
Ok ok ... now I see what you have there! Sorry but that's no 'barb' as you 1st called it  part of the gland nut.  All that paint on there it's hard to see look'n on the net, sorry I sent you down the wrong path!  As mentioned some can be a bit different  and doing this by pics is well.... not easy  !


So that's a retaining ring of some sort that I think has to be rotated out of the slot there.  So if you loosen the nut a bit it the ring should stick out a bit more not ??  Then if you grab it with a good vise grips along with turning the nut back to the right will it work it's way out?? You said below the ring moves a bit when you turn the nut which is a good sign.  Then keep doing this always getting a new bite on the ring(as it comes out) slowly twisting it out of there.  You won't be able to turn the nut too much as it will jam against the ring, just little bit at a time so it doesn't bind.  You may not be able to just "pull" it out with not helping it along by turning the gland nut a bit each time at 1st but try tapping on the vice grip with a hammer to rotate it out too.  DON'T break the end off the lock ring what ever you do!  When that comes out the gland nut should come off. Hey can you see the other end of that lock ring as in the parts pic it shows it having 2 ends with loops on it.  Just to be sure its not hooked on something and preventing it from being turned out of there. There is probably a simple method to take this apart,  but like with most things like this the  first time can be painful!!

Does that cylinder tube for sure have threads on it under the gland nut some place?  The parts picture was cut off so I can't see the end of the tube. I suspect the lock ring  rotates out and the nut then turns off....
« Last Edit: December 28, 2014, 12:50:50 PM by Haymaker »
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #15 on: December 28, 2014, 11:07:21 AM »
More pictures of the gland nut and lock ring.Yes when I rotate gland nut this ring sticks out of the gland nut then as I rotate the g/n the ring rotates also.I have also tryed this on other g/n on my machine with same results.Number 21 I guess is the ring that stick out of the gland nut im not seeing any threads inside small slot.Thanks for the offer PM
« Last Edit: December 28, 2014, 11:13:15 AM by imperial1960 »
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #14 on: December 27, 2014, 10:40:51 PM »
20 is the gland nut 21 looks like the ring  lock im trying to remove  23 is the tube that looks like its treaded on.

Ok so 20 the gland nut only turns 1/4 turn and comes to a stop? 

Back to the little barb you called that you bent up a bit, what's under it in there?

Where are you seeing this lock ring?

Check your pm too
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #13 on: December 27, 2014, 09:08:50 PM »
20 is the gland nut 21 looks like the ring  lock im trying to remove  23 is the tube that looks like its treaded on.
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #12 on: December 27, 2014, 08:17:43 PM »
#22 snap ring....where is that. As it looks like an external snap ring if the pic is correct.?? is that under #20 or something? Is #20 actually threaded on?
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #11 on: December 27, 2014, 07:11:54 PM »
Here you go any idea?
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Haymaker

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Re: Hydraulic Cylinder Repair
« Reply #10 on: December 27, 2014, 12:10:09 PM »
I wish I could see this in person!! So is there threads under that collar/ring piece you're trying to turn? Or maybe does it just turn a 1/4 turn and lock in place or something. If you figure the collar is loose and your trying to get the cylinder apart there is an easy way to do that.

If you have a parts diagram of the cylinder post that if you can.
« Last Edit: December 27, 2014, 06:15:12 PM by Haymaker »
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imperial1960

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Re: Hydraulic Cylinder Repair
« Reply #9 on: December 27, 2014, 10:59:35 AM »
well i have soaked gland in p/b oil the ring lock will not move but i can rotate gland about 1/4 turn then the ring lock must stop the gland fom turning.i welded a nut on vise grips thinking it would break loose with slide hammer even went up and down with ring no luck.looking at parts book it shows a hook at the end of the ring
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