I had a coolant leak on the Mack, looked like a plastic fitting on the plastic coolant tank, that had a brass fitting on it, with a length of 5000 PSI hose going to the radiator. Why they didn't use silicone hose I don't know, the weight of the heavy duty hose, stressed the leaking fitting I figured, and it was unclear how the fitting was secured until I took it apart, so I found a "exact" replacemant on EBAY, and once it came in pulled the tank off. The non pipe thread brass fitting I now saw, achieved it's sealing by an O ring, that looked deformed, so as I installed the new tank I of course used new O rings. Instead of a standard radiator cap, it had a screw on plastic cap, and while I'm sure I put it on right, it went missing after a few miles. Turns out that cap is unobtainable, to get one you have to buy the entire package, about $65.00 with freight. So, I ended up putting the old tank back on, as it's bad 0 ring was the only thing wrong. Total cost $1.00, or about $85.00 if I count the unused new tank and a few gallons of anti freeze. While this was going on, over 2 or 3 weeks, leaking coolant, I made sure to tell everyone that if they saw leakage when I left the jobsite, it had nothing to do with the crane, a lot of them wouldn't know the difference between hyd. fluid or coolant.
The pic was a tricky setup job, worse than it looks, questionable ground, one outrigger right near the foundation wall, but in a puddle, a drain field on one side, but we got it done. A small 5500 square home, with a big shop planned for next year, I don't know where some people get all their money, 9' ceilings in the basement of course, 10' elsewhere.