8030 fwa hard steering

Curious if anyone has any insight on an 8030 fwa that I have. Was filling in a trench and dropped front tire in, steered out and now I have very stiff power steering. I changed filters and checked pressure at cylinder and only have 820psi with hoses hooked together and left turn. Book says it should be 1800-2000 when checking steering relief valve pressure. What would be next thing to check from this point. Thanks in advance

Then I get 750 psi.

With wheels off ground it's a little better but still not how it should be. Where can a guy get parts for these? Seems in my neck of the woods it's getting tougher.

Thank you sir I really appreciate it. If I would take the pressure hose off at the steering valve and check it that should tell me if the pump is good or not right?

If you could place a shut-off valve and gauge between the pump and orbitrol and slowly close the shut-off valve to see if you can reach 1600 psi or not (before the shut-off valve), that would confirm pump OK or not OK. This would be kind of risky but would be a way to test it without a dealerships hydraulic flowrater tester tool.

For a test like this would it tell you anything if you put a T in the steering line with a gauge, then tried to turn your wheels all the way in one direction. Just asking.