--- I copied this from a posting I made a few weeks ago --- One extra note: the TSC's up here in Canada don't seem to stock the same things as the US versions, and hence they don't carry the "stock" lock...and hence my alternate solution described below.
Hello all;
One of the first "implements" I bought for my new CUT (spring 2006) was a 7 hole drawbar. I am absolutely a newbie but when I saw the drawbar for $20 at TSC I knew it was just what I needed to pull my (max GVW) 1500lb trailer around the property. When I put it between the 3ph arms all seemed well until I I put the trailer on the ball and the whole thing swung upside down. I know this is a common problem because I looked for solutions and found that several of you have welded together drawbar locks or bought them at TSC. Well, I don't weld (yet...and please let's not start on the thread about "a guy with a tractor that doesn't weld????") and the TSC here had never heard of a drawbar lock, nor had my NH dealer where I bought the tractor. So I'd tried some things with stock angle brackets but they all bent out of shape quickly. Last week I was at my dealers and saw this U-bolt that looked about the right size. It was $16. I bought it on a chance...
The 3ph bar was about 1/16" too wide to fit in the "U" (see pics) so I had to angle grind a bit off the inside surface of the U-bolt, but other than that it worked great!
I just thought I'd share this in case anyone else was looking for a drawbar lock but didn't have access to the "real thing".