I usually put four or five tires in the car before I crush it. The yard allows five tires per car and they don't have to be the original but they can't be tractor or truck tires. I have a bucket on my machine so I crush with that and have to bucket chain cars to load.

When I crush, I start with my bucket as far forward as possible, come from the side and push the center of the roof in. Then I get the bucket on the far side door and pull that in on top of the roof. Then I back up and push the near side door in on top of the roof. Finally, I flatten the bucket and crush the whole shebang.

For the glass I minimize a mess by simply rolling the windows down. It still breaks, but it's contained in the door. You could also put a tarp under the car and fold the tarp full of broken glass at the end. Windshields usually don't shatter.



Make sure you don't overload your trailer and break an axle or something, and lose your money maker. A guy can't make any money if he has to constantly fix his equipment.