NAA Pressure Relief Valve

[Ian074]

Today I started tearing into my lift cover to try and solve a couple of issues.
Things started going wrong right from the get-go.
When I removed the acorn nut the small pipe nipple came with it. This left the relief valve flopping round. You can't see it in the picture but the screww fitting to back the valve off came out rust-frozen in the head of the acorn nut. The pictures might explain better if I can figure out how to post them.
Anyway, where do I go from here? New valve?. Maybe fix this somehow? Any and all ideas are welcome.

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[Ian074]

Note: Post above incorrectly identified "pressure relief valve"
The correct identification should have read "Hydraulic Assembly Back Pressure"
Are these items available from anybody other than New Holland?

 

[Jim.UT]

(quoted from post at 15:50:58 03/27/09) Note: Post above incorrectly identified "pressure relief valve"
The correct identification should have read "Hydraulic Assembly Back Pressure"
Are these items available from anybody other than New Holland?

I'm sure I have some good used items on the shelf. If you're interested shoot me an email and I'll try to track them down and send you photos.

 

[Ian074]

(quoted from post at 21:06:10 03/28/09)

(quoted from post at 15:50:58 03/27/09) Note: Post above incorrectly identified "pressure relief valve"
The correct identification should have read "Hydraulic Assembly Back Pressure"
Are these items available from anybody other than New Holland?

I'm sure I have some good used items on the shelf. If you're interested shoot me an email and I'll try to track them down and send you photos.

Okay, but I need and email address

 

[John Smith8N]

Heat the nut to release the rust bond and carefully remove the threaded sleeve. Then just push the sleeve back onto the valve. The threaded sleeve is not part of the actual valve, it's just slipped over it for mounting purposes and kept in place by that small springy ring. When on the tractor, turning the sleeve in presses the bypass valve against the rubber seal on the side of the lift cylinder. Turning the sleeve out releases the bypass valve so the top cover and cylinder can be removed. Turning the sleeve out too far results in what you have done and it's not a big deal. It likely did not hurt the valve itself.

 

[Ian074]

(quoted from post at 21:14:59 03/28/09) Heat the nut to release the rust bond and carefully remove the threaded sleeve. Then just push the sleeve back onto the valve. The threaded sleeve is not part of the actual valve, it's just slipped over it for mounting purposes and kept in place by that small springy ring. When on the tractor, turning the sleeve in presses the bypass valve against the rubber seal on the side of the lift cylinder. Turning the sleeve out releases the bypass valve so the top cover and cylinder can be removed. Turning the sleeve out too far results in what you have done and it's not a big deal. It likely did not hurt the valve itself.

Thanks. I have managed to get them apart. The real problem is that the valve looks all dinged up like somebody beat on it. I have a hunch that the last person forced the lift cover off, wrecking the valve. Tube is all beat up.
The worst of it the valve itself seems frozen. I put over 110lbs air to it and it didn't budge. frozen solid. I think what the rust didn't get the abuse did.
Even as a last resort a punch only moved ita couple of thousans of an inch.
I fear it is lost.

 

[Jim.UT]

(quoted from post at 08:13:08 03/28/09)

(quoted from post at 21:06:10 03/28/09)

(quoted from post at 15:50:58 03/27/09) Note: Post above incorrectly identified "pressure relief valve"
The correct identification should have read "Hydraulic Assembly Back Pressure"
Are these items available from anybody other than New Holland?

I'm sure I have some good used items on the shelf. If you're interested shoot me an email and I'll try to track them down and send you photos.

Okay, but I need and email address

Sorry, I'm not used to this modern view. I assumed my email address would be linked like in the old version. My email is [email protected]