Tiller Woods Tiller Repair

[KubotaSteve]

I was out doing some tilling today and had some issues with my Woods GTC60 tiller. First, the corner piece of steel that holds the bolt which holds the rear gate broke off. I welded another piece of stell on there and fixed that with no problem. Then a couple hours later, I broke a link in the chain. Here is my question, can I replace just the link that broke or do I just get a new chain? Right now I am leaning towards getting a new chain as I'm afraid that some of the other links may be on the verge of going.

This has been the only issues I have encoutered with this tiller that I bought new over 5 years ago and I till quite a few gardens every year for people in the community.
Thanks in advance for any suggestions.