You are spot on for what to try. Spray with PB Blaster for a "few" days and then try to break them loose. If no luck apply liberal amounts of heat and try. They will eventually come out.
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DWayne
1973: 128, ag tires, 3pt. lift, spring assist, lights, 42" Deck
10" moldboard plow
2016 XT1 42" deck 18HP
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