Talked with Burley Tractor (http://www.burleytractors.com/home.html). They still do some limited repair/parts things. He said that he wasn’t aware of anyone in Washington who still did repairs – except perhaps a guy in Roy. You might call Burley Tractor to get more information.
Don’t know where you are in WA state, but if you’re near the southern border Keno Tractor in Keno, OR would be a good bet. https://www.kenotractors.com/
If you are in eastern Washington, you can contact Josh Cook at Ranch hand tractor in Chewlah, WA. I have talked to him several times on the phone and he seems real knowledgeable and answered my questions. He can be reached at 509.936.2862.