Payload?
I seem to remember it was loaded until you couldnt fit any more on it !
7 cubic yard body, load about 7 to 9 ton
also in those days there wasnt any red diesel, you filled in a diesel record, very trusting everyone was!
Nice Traders in Turkey, bet they loaded more than 9 ton !
Who remebers Butts from Northampton area, they had a fleet of Traders on the M1 contract.