Posted by IH fan on September 13, 2013 at 13:45:59 from (174.70.169.139):
In Reply to: New To Me 1966 IH 504 posted by Florida 504 on September 13, 2013 at 12:00:01:
Couple of things... in going back over your pictures, I noticed there are 2 aux. valves on the tractor, so are those used for the loader, or do you have separate valves as part of the loader?
Also, I mentioned there is nothing wrong with your master or main relief valve... it might be stuck and that's why it blew the line. Or the line may have just had a weak spot. Only way to tell for sure is to install a gauge and check it according to a service manual. Again, there might be circuit relief valves built into those auxiliary valves.... don't know. I don't recall what those Cessna pumps were actually "rated" at, but most likely they will stand 2500 psi. I know at that time if Cessna rated one at 2000 psi, it would probably take 2500 all day long and 3000 for short periods... we tested them that way for hundreds of thousands of cycles.
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