If it is articulated the choice of engines are Detroit 6V-53, Cummins V-785 C. some were made with Leyland engine, Most likely GM or Cummins
S/N 4128A- had Clark 2420 Transmission, which was a 2 speed power shift with a mechanical High and low range. S/N 401A, B GM engine with Clark 28420 Transmission which was a 4 speed power shift. S/N 426A version had Cummins engine with the 28420 Transmissin. I haven't been able to find weight yet, I'm guessing that it's in the 15,000 Lb. range. I'll try to find a weight chart and get back to you. The 75A weighed in at 12,750 lbs. the 125 A weighed in at 18,500 Lbs. the 85 ariticulated was in between those 2 machines. Height of 125A 7 Ft 2" without cab, width 7 Ft 91/2", length with bucket on the ground 18 Ft 2". 75A height 6Ft 8" without cab. width 6 Ft 10 1/2" Length16 Ft 10".