Deckel Fp1 Spindle head spanner nut

Hi guys, im changing the bearings on my Fp1 Mk3. Im getting a hard time removing the nut from the spindle head bevel gear, its hard to lock the bevel gear and hard to remove the nut. It´s weird because i managed to turn 10° but its getting harder and it jammed the bearing. Is it left-hand threads?

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