Go left along the vine and pick up the Mech Crank. Along with the Mech Motor you recovered from the Production Zone, use it to finish building the Mech walker.
he is at the steamwork
go onto youtube and search video walkthrough for steamworks
It is under two stacks of hay by a farmer. Slide the stacks apart by going in between them. There should be a door. Open it with the key you received earlier.
at the bottom duhhh
0516
I dont know you FOOL!
its in the museum on mainstreet of steamworks island :)
It's Steamworks Island #14th Island
The combination for the painting in Ziggs' room is 0516
(The solution is at the related question "How do you beat Steamworks Island")
the crab on steamworks island is next to the living quarters
There are no windows that open inward on Steamworks Island. There is a skylight in the City Hall that can be opened with the Multi-Tool. You go out the hatch above Zack's room in the living quarters, to reach the Mech Crank on the vines.