1080b won’t move

Hi guys, any help you could offer would be appreciated, I have a case 1080b excavator that stopped moving. It was working fine, I stopped and shut it off for lunch and it would not move again. I tested power to the switch and the switch seemed to be working, I traced the wires back to a solenoid, I wiggled them just to see where they went, and in hopes it had a loose connection, and still nothing. I came back to the machine an hour later (with a friend that had some experience working on these older machines) and the machine worked like it never had a problem. We tried to get it to do it again and it kept working flawlessly. Now that brings us till today, the machine has been parked in the same spot for about a month since that episode, got in today and it doesn't move, tested power at the switch again, switch works and has power, chased the wires back to the solenoid and it has power at the Solenoid when the switch is toggled, I noticed the wire going to the solenoid was a little messed up like someone had stripped the insulation back to test it before. I pulled the solenoid off of the hydraulic valve to inspect it. It looked pretty corroded, we cleaned it up and soldered a new wire on to it, but Im not sure if I tested it correctly, I don't think its working though, I called around for a new one and seems very difficult to get. maybe Im looking in the wrong places. its pouring rain out right now, so i figured id try to search out if anyone else every had this problem, and found a solution. (Ive searched the forum and have seen similar problems but no solutions offered.) so my questions are 1. Has anyone had this problem in a manner in which I described ? 2. Was it indeed an electrical issue? 3. Where can I get parts for this machine ?