What is the SAE rating of hydraulic hoses on an L4400 front end loader?

[tallyho8]

I need to know the rating and it is worn off on my hoses so I can't read it. I want to get a hose with the same rating for my grapple.

I have had new hoses fail fast and believe it is due to using a lower rated hose.

 

[2458n]

TSC hoses have a 4000 psi rating. I just replaced a couple this weekend on my kubota front end loader. I think the pressure is limited at the valves and pump below this. Are you getting higher pressures by pushing with the tractor against the cylinders? Can you just buy a hose with more wires in it?