To turn on the power, you need to reach the other end of the map, at the opposite of spawn.

You need 4 pieces to build the trample steam, each has 3 locations, in the same area :

• Bellows : Left to Juggernog, before the rift

• Flag : Right to Juggernog, before the rift

• Grid : Garage

• Motor : Inside the Diner

The Pack-A-Punch is located at spawn, you can return to this area by using the trample steam.

To build the shield, you'll have to build the trample steam first.

Then you can find the 2 pieces of the shield on the other side of the cliff, around double tap and around the titan wallbuy.

The crafting bench is located inside the Diner.