Kubota M59, Kubota L3800, Grasshopper 428D, Topkick dump truck, 3500 dump truck, 10 ton trailer, more lighter trailers.
If you have to ask calling a heavy equipment mechanic is probably the best plan. It’s a pretty straightforward job but that’s not a light counterweight. Usually the counter weight sits in a track with a couple of large bolts in the bottom. You have to remove the bolts and lift it off the track.