throwing in my two cents
we left our hose attatched last winter
it was our first time with the hydrant and no one told us not to!! (I know, excuses, excuses...)
Anyway, the handle head split. water was going everywhere - and the turn off is.... up at the road on the far side of the property
(easily a 1/4 mile)
Anyway, we got it capped off so we could go into town. We ended up having a friend who had an old one we just tookt he part we needed off of - and replaced it. The handle and spout screw off. The pipe will screw off at the end of the 4 foot, too, but without being able to see that well, you can't be sure of it being screwed in tight if you replace it (due to rust or some such).
I hope you don't have to break out that concrete - we had to break concrete this last summer, too - it isn't fun.

we left our hose attatched last winter

Anyway, the handle head split. water was going everywhere - and the turn off is.... up at the road on the far side of the property

Anyway, we got it capped off so we could go into town. We ended up having a friend who had an old one we just tookt he part we needed off of - and replaced it. The handle and spout screw off. The pipe will screw off at the end of the 4 foot, too, but without being able to see that well, you can't be sure of it being screwed in tight if you replace it (due to rust or some such).
I hope you don't have to break out that concrete - we had to break concrete this last summer, too - it isn't fun.