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PLEASE HELP..Photos


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#16 Auburn David OFFLINE  

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Posted May 26, 2016 - 08:29 AM

This happens when the rod is all the way IN the cyl Housing..(fully retracted)..the seals on the piston its seal look great..its the seals on the cap that get damaged when it pops out.



#17 Auburn David OFFLINE  

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Posted May 26, 2016 - 08:31 AM

I'm sorry David , meant to say " take a picture of that cylinder in the extend  position "

It has no problem with fully extended..just fully retracted..thats what has me scratching my head.



#18 Auburn David OFFLINE  

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Posted May 26, 2016 - 08:32 AM

If it's the relief valve that's goofed up, wouldn't it be blowing all the seals on the loader and backhoe? not just the one cylinder?.

What are the measurements of the cylinder? I have a big pile of cylinders, maybe I have one that would work?

I will get measurements..I do know this one is worn out.



#19 Auburn David OFFLINE  

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Posted May 26, 2016 - 08:34 AM

These are welded cyls.



#20 BTS ONLINE  

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Posted May 26, 2016 - 08:43 AM

It has no problem with fully extended..just fully retracted..thats what has me scratching my head.

 

That's because the fluid has pressure on the end seal when the cylinder rod is going in. When the cylinder is being extended, it has pressure on the opposite end of the cylinder. that's why the seal blows when it's being retracted.

Hope this makes since


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#21 Auburn David OFFLINE  

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Posted May 26, 2016 - 08:45 AM

That's because the fluid has pressure on the end seal when the cylinder rod is going in. When the cylinder is being extended, it has pressure on the opposite end of the cylinder. that's why the seal blows when it's being retracted.

Hope this makes since

Seal doesn't really blow..its the Aluminum end cap that is ejected.



#22 Auburn David OFFLINE  

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Posted May 31, 2016 - 03:22 PM

I was a hydraulic specialist with the Navy and have seen problems similar to this in the past. what do the packings look like when you remove them, crushed, torn, or does it look like a blowout? Sometimes with wear when the cylinder returns to its fully retracted or fully extended position it hits the seals or depending on the cylinder pinches them and that causes the failure. the next time you break the cylinder down take pics of the whole unit and its paryts so I can get a better idea of its construction. Send it in a pm to me and I will try to help you out as much as possible. One last thought, do your cyliders call for shims at all in the manual?

I cant find any paperwork on this Back hoe at all..it was made by Dig-it and they are no longer in bizz from what I can find.



#23 Auburn David OFFLINE  

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Posted May 31, 2016 - 03:24 PM

Tractor and FIL are a Ingersoll 6018..The Backhoe is a Dig-it the whole unit was sold as a Dig-It 188T(198-T)



#24 Bmerf ONLINE  

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Posted May 31, 2016 - 06:15 PM

The first photo in the header shows the aluminum counted sunk cap that is being ejected...here it is again

 

David, I believe that there should be a steel ring that goes in the slot. Don't know what they are called, but basically a piece of square wire ~1/4 x 1/4 inch. Hooks in a hole in the cap. You then turn the cap and feed the wire in the slot. Once you have turned the cap almost all the way around, the wire secures the cap in place, no more blowing out the end.


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#25 Auburn David OFFLINE  

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Posted May 31, 2016 - 06:29 PM

David, I believe that there should be a steel ring that goes in the slot. Don't know what they are called, but basically a piece of square wire ~1/4 x 1/4 inch. Hooks in a hole in the cap. You then turn the cap and feed the wire in the slot. Once you have turned the cap almost all the way around, the wire secures the cap in place, no more blowing out the end.

Yep..I replaced those..even welded a bar across the top of the Cyl..it still blows the cap.but only on that one cyl.



#26 Auburn David OFFLINE  

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Posted May 31, 2016 - 06:31 PM

doesn't blow any of the seals..but tears them up as the try to pass the wire retainer.



#27 Eric ONLINE  

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Posted May 31, 2016 - 06:44 PM

Just got back to the post, I have seen similar problems with worn cylinders and the best we could come up with is pressure blow by due to worn housings and or worn actuating rod. I have also seen strut acummulator caps fail due to wear, they have solid caps on the end that are secured in a similar fashion to yours and after a long time and alot of cussing found that the cylinder had worn slightly and no longer would hold the cap at pressure causing blowouts and alot of pilots needing new pampers on landing! Good luck I would replace the whole unit and have a beer. by unit I mean the cylinder.
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#28 Auburn David OFFLINE  

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Posted May 31, 2016 - 06:56 PM

Now to find one!



#29 MH81 ONLINE  

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Posted May 31, 2016 - 07:55 PM

Is there a possibility that there is something under the ram (downhill end) and its stopping causes the back end to blow out?
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#30 29 Chev ONLINE  

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Posted May 31, 2016 - 08:26 PM

Now to find one!

Most hydraulic places deal with places that can custom build a cylinder to match what you have if you can't find an off the shelf unit to match it.


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