dont force anything, give it a small twist and get some PB Blaster in there to lube it up..let it sit a day then get back at it. The Kubota injectors are fine threaded,give them time to soak up the blaster spray..its gets in there and prevents Kubota injector thread galling stripouts and the Case teflon injector washers from sticking and staying in the injector pockets when u remove them..slow and low is the tempo
