[brother]

My Cub Cadet 127 has what I think is a 48" mower deck. See 3 photos attached.

The zirk fitting on the center pulley will not take grease. The little ball at the tip of the fitting presses in and out but still the fitting will not take grease. So I tried to unscrew the fitting but the fitting just spins like the threads are stripped.
One photo shows a wrench on the top nut of the pully shaft and a second wrench on the hex base of the zirk fitting

Does anybody know if these Zirk fittings are the kind that press rather than screw in and out?

Elsewhere, I have seen the unthreaded kind with barbs instead of threads. If this is a threaded fitting I do not want to try to just yank it out as if it were the press in kind.

FYI, It appears that the zirk fitting must first be removed before the top nut on the pulley shaft can be removed.

Thanks