Jumbor Girls

The 4 mecha girls from "Jumbor", a new manga I've recently gotten into by Hiroyuki Takei (author of "Shaman King"). From left to right:
Jumbor #1: Crane the Mobile Crane,
Jumbor #3: Kili the Rock Drill,
Jumbor #10: Petica the [unknown], and
Jumbor #5: Mixa the Cement Mixer.

These aren't their official color schemes by the way.