Well I finally got the steering valve out. That was 4 hours of work. Not extremely hard but time consuming. Now in process of disassembly. There sure is a lot of sludge in the bottom of steering unit. I don't see Obvious problems anywhere. Just really dirty In the bottom valve area. Ordered all of the small springs and check balls plus the rebuild kit. They were cheap in a Deere way! I see there is adjustments internal and external! Have not messed with any yet. Waiting for the service manual to arrive! One small spring is messed up but I don't know if that is what's causing the locking steering and ratcheting. Any ideas Tim?