The text guide isn't difficult to follow but I thought I'd put a video guide here for anyone struggling. This will include all the locations of the cart pieces needed.
After meeting up with Terrance (Think that's his name) he will ask you to find a cart.
Go talk to Oswald the Carpenter (Note that he mite not spawn, if so. Completely shut down the game and reboot it up, then select continue story, then select the chapter 'New hat' Then after doing so he should be there)
Once you start talking to him you'll have to choose some dialogue choices to convince him to help you fix the cart.
Select the following dialogue choices:
"Ahoy matey""You have a really nice cart there""Oh, and is there anyway to fix it""Ok, there's a turtle in trouble"He will then send you to Erik the Blacksmith who is on the other side of the barn. Once you start talking, select these dialogue choices:
"Good morning Erik, may I ask something?""I need to fix Oswald's cart""Oswald sent me here, I need nails and horseshoe""Well.. I found a turtle""Yes, no, I found a turtle, but now she's gone"After that, the quest will begin to find the missing pieces of wood and metal. Their are 3 pieces of each. Every time you are in close proximity of one of the pieces. Your character will say
"I know a piece is near" Here is the video guide I made on where to find all of them in the quickest way (Ignore my failed attempts on trying to jump on the big rock) Game controls are like being a one legged man in an ass kicking contest. Once you have found all of them, return to Oswald and your achievement shall pop