Speaking of truck scales, a few years ago in one of the terminals I haul out of the scale was reading 2500 kgs light. (2500 kgs = 5500 lbs.) we didn't know it and I was constantly loading more and more on my B-train trying to get my gross up to my licensed weight of 63,500 kgs (139,997 lbs). it wasn't until the end of the season that it was figured out what was going on. They now meter the product on, 21,000L (5555. gallons)in the lead and the balance (20,000L) in the pup gives me a total of 41,000L (10,846 gallons) I am legal up to 42,000L (11,100 gallons). I am hardly ever pulled into the scales and thankfully not during the year the scales were out of whack.
Do the math, trying to tip the scales at 63,500 not realizing they were light by 2500 kgs. So I was regularly scaling out at 66,000 kgs (145,500 lbs), just a little overweight. My C 15 CAT handled it, no problem as did the air disk brakes on the train.