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Hydraulic Seal Question.... Help


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11 replies to this topic

#1 tweidman OFFLINE  

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Posted December 03, 2014 - 12:58 PM

I took my hydraulic steering cylinder apart because it was leaking. The control valve seal seems to be the problem. The seal that is leaking has a square shoulder, but I could only find and O ring replacement. Will an O ring work? If not, where do I find a replacement, the dealer says it's No longer available.

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Edited by tweidman, December 03, 2014 - 03:10 PM.


#2 1978murray OFFLINE  

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Posted December 03, 2014 - 01:55 PM

an o-ring will most likely work as long as it fits in the slot. the oring will compress some when tightened down and fill in the gap. 



#3 tweidman OFFLINE  

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Posted December 03, 2014 - 03:14 PM

an o-ring will most likely work as long as it fits in the slot. the oring will compress some when tightened down and fill in the gap. 

There is a grove that it fits into and then the shaft runs though the inside of the seal. So, nothing gets tightened down.

The O ring does fit the shaft tighter than the old seal. I'm just wondering if it will seal and wear the same as the old part.

 I'm not sure how the old squared off part compares to the round O ring in it's ability to hold the pressure and seal the fluid?.


Edited by tweidman, December 03, 2014 - 03:24 PM.


#4 olcowhand ONLINE  

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Posted December 03, 2014 - 03:20 PM

It should do fine.  It may not last quite as long as the square one simply because the o-ring has less surface area to seal & fight wear.  I have replaced many square rings with o-rings & they have always performed well.


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#5 tweidman OFFLINE  

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Posted December 03, 2014 - 03:24 PM

It should do fine.  It may not last quite as long as the square one simply because the o-ring has less surface area to seal & fight wear.  I have replaced many square rings with o-rings & they have always performed well.

That's good to hear. Now that I made a tool to get it apart, it won't be that hard to replace if it starts leaking again. I'll try it and see what happens.



#6 8tyman8 OFFLINE  

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Posted December 03, 2014 - 04:11 PM

Your safest bet is to go to a hydraulic shop and order quad rings I replaced the lip Seals in my bolens vales with the
And I would recommend going that Route
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#7 Bruce Dorsi OFFLINE  

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Posted December 03, 2014 - 04:13 PM

 where do I find a replacement?

 

 

 

 

Here is a source: http://www.theorings...ex&cPath=367_98

 

More than likely, the shipping will cost more than the parts.


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#8 KC9KAS ONLINE  

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Posted December 03, 2014 - 07:39 PM

Your safest bet is to go to a hydraulic shop and order quad rings
And I would recommend going that Route

This is what I would recommend...Go to a hydraulic shop for the correct parts.  :iagree:


Edited by KC9KAS, December 03, 2014 - 07:39 PM.


#9 skyrydr2 ONLINE  

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Posted December 04, 2014 - 04:25 AM

Don't use an o- ring .... Its edges are round and thus allow dirt to get jammed under it. That seal needs sharp edges to keep it clean and free moving.
A good hydraulic shop is your best bet.

#10 olcowhand ONLINE  

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Posted December 04, 2014 - 08:36 AM

Many cylinders come factory with simple o-rings.  No doubt though that square are a bit better.



#11 Canawler ONLINE  

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Posted December 04, 2014 - 09:43 AM

McMaster-Carr is another good source for square o-rings.

#12 tweidman OFFLINE  

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Posted December 04, 2014 - 11:20 AM

Thanks guys. I think I will try to find the square O ring locally before I put it back together.

Although I don't think dirt will be much of an issue where this seal is located. It is not directly exposed to the elements.






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