Did it this morning. I used the same kind of chain in Kenny's pic, already had a small piece. I didn't have any angle metal, so I just put the bolt/lockwasher/flatwasher through an end link with the link facing away from the tractor, screwed it in the bolt hole, brought the chain under the drawbar and back up to the other bolt hole, and screwed it in(after I had measured and cut the chain). With the two links bolted on, they are horizontal, and the remaining chain hangs vertical from the bolted links. There's just enough slack in the chain so there is no downward torque on the pump shaft, and the pump/chain assembly just slides on/off so there's no removing of any bolts, clips, etc.
Thanks Kenny, and all the others input.
