- "I've ask and I've ask, we need a new crane! Instead of old Happy Hook here!"
- — Dart's opinion of Happy Hook, Day of the Diesels
Happy Hook was an old, broken crane at the Sodor Dieselworks. Kevin loves playing with the old crane. Happy Hook was restored at the end of Day of the Diesels.
In the seventeenth season, Diesel 10 decorated Happy Hook with Christmas lights, red ribbons and a mistletoe.
Happy Hook before restoration