This is a truck that can repair damaged parts.It can't replace broken parts.
Overview:-
There are two guns(second screenshot) in the front of the arm.One of them repair(-20 damage).The other one destroys(100 damage).The truck is fully functional.

Controls:-
Ag-4:activates repair gun
Ag-5:activates damaging gun
VTOL-Rotation(180 degrees each side)
Trim-Elevation and depression(85 degrees up and down)
Pitch and roll-Driving controls.
Throttle-Extend arm

Guide:-
In the first screenshot , you can see a control panel.In there you see two controls levers and 3 lights.AG-4 activates the blue light.This tells you that your repairing gun is active.AG-5 activates the red light.This tells you that your damaging gun is active.Why do you need a damaging gun?Well , sometimes you need to remove stuff in order to repair. Pressing the fire button will turn on the yellow light on the Elevation and Depression control stick.It goes off when you release the fire button.It is a way of letting you know whether or not your gun is firing. Don't know why you will need it but it kool.

Views : CAM-1 - gun cam.