I"m looking at a 175B, ser# 8049 I think (i didn"t write it down!). It looks to be in good shape overall, with no serious hydraulic leaks and no suspicious welds or repairs. The undercarriage is probably 70%. I haven"t been able to hear it run yet, but the owner says it runs good and strong and it steers good both ways. My big concern is with the turbo on the engine. It is covered with oil, as is the surrounding area of the engine. How big a job is it to reseal/rebuild the turbo and how expensive? Is it specialized, like rebuilding a Diesel pump, or can any old shadetree mechanic handle it? What might be a fair price for the crawler? Are there any weaknesses that I should be looking for on the machine in general? Many thanks!!