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Repairing Hydraulic Gear Pump


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#1 FilledTires OFFLINE  

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Posted August 06, 2014 - 11:05 AM

Hi Everyone,

 

I have attempted to repair my Hydraulic Gear Pump that came off of an old Kwik Way Front End Loader.

 

It was leaking oil.

 

Here is what I did. It has worked so far for about an hour and hopefully will hold up long term.

 

1. I disassembled gear pump and found that the two o-rings that help seal the pump area were cracked and old.

 

2014-08-02 16.02.21.jpg

 

2. I put a thick bead of Permatex Ultra Black Oil Resistant RTV Gasket Maker into the grooves that the o-rings once occupied.

 

2014-08-06 09.53.01.jpg

 

2014-08-02 15.51.34.jpg

 

3. I re-installed everything onto the tractor and the loader works great with no leaking so far. I have ran the pump for about an hour to get the temperature up.

 

Do you think this RTV Gasket Maker will hold up long term? The reason I used this was because I couldn't find the appropiate sized O-rings anywhere. They are abut 4" in diameter and very thin.

 

Let me know your thoughts.

 

Thanks in Advance!


Edited by FilledTires, August 06, 2014 - 11:06 AM.

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#2 olcowhand ONLINE  

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Posted August 06, 2014 - 11:14 AM

I wouldn't think it will hold long term, but then who knows.  I would be looking for the right o-ring myself.



#3 BairleaFarm OFFLINE  

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Posted August 06, 2014 - 03:46 PM

I would consider it a temporary fix at best. Either way at last you got the leak fixed

#4 JDBrian OFFLINE  

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Posted August 06, 2014 - 04:34 PM

I'd also be concerned that some of the silicone squeeze out would get into the pump and fluid. If you go to a hydraulic repair shop they should be able to find you a replacement o ring.


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#5 FilledTires OFFLINE  

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Posted August 07, 2014 - 12:34 AM

Thanks everyone for your thoughts. I will keep track of how many hours I go with the sealant before it leaks again and report back. Meanwhile I will try to find the proper o rings.

 

Thanks!


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#6 FilledTires OFFLINE  

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Posted August 10, 2014 - 08:34 PM

Update: I put another 2 hours on the Hydraulic Pump Today making it 3 Hours Total, and the RTV Gasket Maker has not failed.



#7 GTTinkerer OFFLINE  

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Posted August 11, 2014 - 01:51 AM

With my luck It would last until the moment I really need it.


Edited by GTTinkerer, August 11, 2014 - 01:52 AM.

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#8 FilledTires OFFLINE  

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Posted August 13, 2014 - 09:05 AM

Update:

 

I did locate the correct o rings from Grainger.com. (They are awesome)

 

I am waiting to see how long the silicone will last before replacing them.


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#9 FilledTires OFFLINE  

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Posted September 03, 2014 - 07:00 PM

Been almost a month now the the gear pump shows no signs of failure. Just letting you know!

 

So far almost a month of constant use and the RTV Silicone has replaced an o ring seal in the gear pump.


Edited by FilledTires, September 03, 2014 - 07:01 PM.

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#10 TUDOR OFFLINE  

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Posted September 04, 2014 - 03:56 AM

I wouldn't be worrying about the RTV gasket failing. I'd be more concerned about the relief valve failing due to bits of RTV getting caught up in the works.

 

 

That stuff should be used sparingly in hydraulic systems, preferably not at all. A thick bead may provide you with a good opportunity to improve your diagnostic skills should the system pack up and move south.

 

I hope ypu have a filter on that system.


Edited by TUDOR, September 04, 2014 - 03:58 AM.


#11 FilledTires OFFLINE  

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Posted September 04, 2014 - 09:13 AM

Good point. I will probably take the pump apart again and put an o-ring back in there now that I have them.




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