Instructions
Press the "Z" button to splash the yellow wall next to the valves with paint thinner, then step into the alcove you've created and walk left.
Dodge the mechanical parts that push out from the wall by waiting until they recede, then running past.
Press "A" twice to double-jump to the lowered column, then ride it as it rises toward the top.
Press "A" twice to double-jump to the platform at the top, then run to the end of the platform to the chest.
Press "A" to open the chest and retrieve the silver pin.