The Classic Machinery Network

i think we are both wrong they where called Caterpillar Quad-Track D9G check this link out http://www.pbase.com/onetrack/caterpillar_technical

i have seen photos of the twin d9 but never one working check it out at this link http://www.youtube.com/watch?v=9gAYeyUB7oA

the photo's i promised to post of me,martin barrat,billy quirk and dave southhall,i was on a 631B for dougal McCgregor dave was on a d8 and box for boundary plant,we where on hire to R and A young strip mining

worked with dave southall in the 80's at wigan,great bloke,will post photo,s later