Drilling Company here used Challenger 3000 Crane Carrier mounted drill rigs for 30 years, most still have the VT903 5&4 in them. Not only did they move the rigs down the road, but when set up on a Well, they had a big "splitter" box that you would use like a big transfer case, then the VT903 ran the draw works and mud pumps (2 Gardner Denver duplex) on the deck. Those Engines took a beating as the rigs grossed out at around 100,000 LBS, and were driven all over the Country! Back in 1987, I picked one up at the yard in Phoenix, went to the old Roadrunner truck stop to get my permits, headed to Burbank CA to do a job for Lockheed Aircraft. I had never done a heavy haul before, so the permit was good for three days. One the morning of the second day, we had spent the night at a place with big enough parking that we could get the rig in. We headed down the road toward Lockheed. Just as I was about to turn into the gate, a motorcycle (CHIP) Cop pulled up beside my window and said "follow me", I said "I am just going right here" He said " I don't give a damn where you think you are going, I said to follow me". So I did, we went down the block to where they had a set of portable scales set up. The Gal in coveralls looked at the drill rig, and told the Cop, " I can't weigh that here" So I got a 5 motorcycle escort across town, put on the big platform scales, 36,000 over gross! I showed him my permits, and he said" where is your route permit?" I looked at the permits, and said "right here, Phoenix AZ to Burbank CA" He informed me that once I hit City limits, I needed a different permit to get o where I was going! I told him I was unaware of that, and he looked at all my paperwork, then informed me that since we were from out of state, I had to post the fine amount, or go to jail. The fine was around $2,800 IIRC, I got lucky as the owner of the Company was there to oversee the begining of the job with Lockheed, (this was a multi million dollar contract) and was able to convince the cops to let me take the rig to the job site (complete with 5 motorcycle escort) The owner talked to the judge, and everything was dropped, They just said " don't ever do it again" Learned a good lesson that day, from then on I made dang sure all my permits were in order, evn years later when I drove for Keen (I started with PDQ out of Cheyenne, but Keen bought them out while I was there) Back to the begining, The VT903 was a damn good engine, and the drilling Company still has some that are on there 5th or more major overhaul! They say it is getting harder to get pars though, I am good friends with the main shop mechanic that has been there 40 years, getting ready to retire. They also have a bunch of V-8 Detroits, here is a picture from the "bone yard"
whole bunch of scrap iron! some actually runs! Most just eat money and take up space in my yard