Desert junkcrawlers

A junkcrawler, accompanied by the Water Guard, plows through sand dunes on a scorching summer afternoon. The Phoenix Bunker Cluster fielded dozens of ramshackle carriers to bring back life giving water from oasis and drill heads. 

Frequent attack by biker nomads and rogue bots seeking replacement parts resulted in them becoming increasing well armed and armoured over time. 

These craft were created on an ad hoc basis, as needed, sourcing whatever parts were available or readily scavenged. As a result, no two were alike; this caused ongoing maintenance issues for the mechanics unfortunate enough to be responsible for keeping them running.

Guards would ride on the back of the machine, wearing sealed suits with improvised cooling systems, and deploy whenever the overhead drones signalled danger ahead. 

That often didn't help much.