Video of dump truck working. This tri-axle dump truck is making a delivery of crushed gravel for a new driveway. This truck fully loaded, legally weighs in at 73,000 lbs. That is about as much as 14 Chevy Tahoe's weigh. It has a 100 gallon fuel tank. At today's fuel prices, it costs almost $400.00 to fill up. When you see a dump truck, make a fist and move your arm up and down and the driver will usually blow the really loud air horn for you. Just make sure your parents know you're doing it so the horn doesn't surprise them. Kids love construction equipment and so do we. We will be making videos of the equipment working and posting them to You Tube for kids to enjoy. We will also include a couple facts in our description so they can learn a little about the equipment.