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hydraulic seal and solid back up ring


 
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mech
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Joined: 21 Aug 2013
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PostPosted: Wed Sep 18, 2013 10:43 pm    Post subject: hydraulic seal and solid back up ring Reply to specific post Reply with quote

Hi dear
I have a question on the subject of hydraulic cylinders, where I have a hydraulic cylinder and I want to replace all the oil seals , but, when i disassembly the hydraulic cylinder and the gland , i found inside the gland oil seal and backup ring together, since , the back up ring is solid (uncut) (none split) and is placed inside the seal as show in the picture above , since this seals and backup ring is placed inside the gland which is have internally grooved , so , my question is :
1- how can i installed this back up ring inside the gland ?
2- is this seal and back up ring is installed together or each one separately ?
3- if i want to cut this back up ring at 30 degree , are there problem or not ? I mean is this correct or not ?
4- if i want to warm the back up ring in the hot water and then put it inside the seals directly , and then installed it together inside the gland , are there problem or not ? I mean is this correct or not ?
5- if i want put the back up ring inside the seal and shaped it together as kidney shape and then installed it inside the gland , is the back up ring is broken during the formed it or no ?
the attach file above is indicate the seal and back up ring
i will wait your help to answer me dear
 


Last edited by mech on Wed Sep 18, 2013 10:48 pm; edited 1 time in total
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TheOldHokie
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Joined: 08 Apr 2005
Posts: 6834
Location: Myersville, MD

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PostPosted: Thu Sep 19, 2013 4:50 am    Post subject: Re: hydraulic seal and solid back up ring Reply to specific post Reply with quote

mech wrote:
(quoted from post at 02:43:39 09/19/13) Hi dear
I have a question on the subject of hydraulic cylinders, where I have a hydraulic cylinder and I want to replace all the oil seals , but, when i disassembly the hydraulic cylinder and the gland , i found inside the gland oil seal and backup ring together, since , the back up ring is solid (uncut) (none split) and is placed inside the seal as show in the picture above , since this seals and backup ring is placed inside the gland which is have internally grooved , so , my question is :
1- how can i installed this back up ring inside the gland ?
2- is this seal and back up ring is installed together or each one separately ?
3- if i want to cut this back up ring at 30 degree , are there problem or not ? I mean is this correct or not ?
4- if i want to warm the back up ring in the hot water and then put it inside the seals directly , and then installed it together inside the gland , are there problem or not ? I mean is this correct or not ?
5- if i want put the back up ring inside the seal and shaped it together as kidney shape and then installed it inside the gland , is the back up ring is broken during the formed it or no ?
the attach file above is indicate the seal and back up ring
i will wait your help to answer me dear


That is is not a conventional o-ring with backup ring. Based on your picture I don't understand where the white ring is supposed to go. It appears the seal in the picture already has a similar ring inside????

TOH
 
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mech
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Joined: 21 Aug 2013
Posts: 3


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PostPosted: Thu Sep 19, 2013 7:13 am    Post subject: Re: hydraulic seal and solid back up ring Reply to specific post Reply with quote

TheOldHokie wrote:
(quoted from post at 13:50:50 09/19/13)
mech wrote:
(quoted from post at 02:43:39 09/19/13) Hi dear
I have a question on the subject of hydraulic cylinders, where I have a hydraulic cylinder and I want to replace all the oil seals , but, when i disassembly the hydraulic cylinder and the gland , i found inside the gland oil seal and backup ring together, since , the back up ring is solid (uncut) (none split) and is placed inside the seal as show in the picture above , since this seals and backup ring is placed inside the gland which is have internally grooved , so , my question is :
1- how can i installed this back up ring inside the gland ?
2- is this seal and back up ring is installed together or each one separately ?
3- if i want to cut this back up ring at 30 degree , are there problem or not ? I mean is this correct or not ?
4- if i want to warm the back up ring in the hot water and then put it inside the seals directly , and then installed it together inside the gland , are there problem or not ? I mean is this correct or not ?
5- if i want put the back up ring inside the seal and shaped it together as kidney shape and then installed it inside the gland , is the back up ring is broken during the formed it or no ?
the attach file above is indicate the seal and back up ring
i will wait your help to answer me dear


That is is not a conventional o-ring with backup ring. Based on your picture I don't understand where the white ring is supposed to go. It appears the seal in the picture already has a similar ring inside????

yes dear , there is a ring inside the seal which is the back up ring is installed inside the seal
TOH

 
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TheOldHokie
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Joined: 08 Apr 2005
Posts: 6834
Location: Myersville, MD

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PostPosted: Thu Sep 19, 2013 7:54 am    Post subject: Re: hydraulic seal and solid back up ring Reply to specific post Reply with quote

mech wrote:
TheOldHokie wrote:
(quoted from post at 13:50:50 09/19/13)
mech wrote:
(quoted from post at 02:43:39 09/19/13)
1- how can i installed this back up ring inside the gland ?
2- is this seal and back up ring is installed together or each one separately ?
3- if i want to cut this back up ring at 30 degree , are there problem or not ? I mean is this correct or not ?
4- if i want to warm the back up ring in the hot water and then put it inside the seals directly , and then installed it together inside the gland , are there problem or not ? I mean is this correct or not ?
5- if i want put the back up ring inside the seal and shaped it together as kidney shape and then installed it inside the gland , is the back up ring is broken during the formed it or no ?
the attach file above is indicate the seal and back up ring
i will wait your help to answer me dear


That is is not a conventional o-ring with backup ring. Based on your picture I don't understand where the white ring is supposed to go. It appears the seal in the picture already has a similar ring inside????

yes dear , there is a ring inside the seal which is the back up ring is installed inside the seal
TOH


I would say this is a trial and error problem requiring a bit of experimentation and some common sense. Based on the construction it seems unlikely you can install the components separately. If it were me I'd attempt to assemble the three individual pieces and install them as a unit. They look like they are flexible and should bend inward enough to let you work the assembly into the groove. If they are not already split I WOULD NOT cut the backup rings.

TOH
 
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