and get repaired and we get them back online as soon as possible. >> this is kind of a dinosaur in the industry. you have to trouble shoot a lot. a lot of times electronics don't fail outright. they get glitch, and it's had 23 years to get glitchy. >> senior agv technician adams runs the workshop. >> we have parts for that. it's basically the electronics that are obsolete. they don't make them anymore. we're doing constant maintenance. >> this is pretty brutal environment for electronics. you can hear them bumping and grinding down the guide path over crumbling expansion joints. they take a beating but they keep on doing the job. >> but since they each weigh 1600 pounds, it's best to stay out of their path. >> you have to be very aware of your surroundings working with these things because they can be dangerous.