Answer:
What goes zub zub zub
A pony trots his way through the world on these.
What jumps when it walks and sits when it stands?
A warrior among the flowers, he bears a thrusting sword. He uses it whenever he must, to defend his golden hoard.
In the fields a frightful thing. Watch it and you will find, it has a pitchfork in the front, and a broom back behind.
I hold two meanings. With one I may be broken, with the other I hold on. What am I?