Caterpillar 16 M Motor Grader. The grader is a 1973 model 16 Cat with 735 hours and 9 shank ripper attachment. The motor grader has a 6 cylinder Caterpillar D343T engine. The transmission is a direct drive power shift with 8 forward gears and 6 reverse gears. Good older solid state hydraulic grader that’s a little rough looking but is a good runner and in working order.