Originally Posted by
Coal Dragger
I guess on topic I can relate the joys of operating brand new locomotives that still have new car smell in the cab. Often times they have issues, usually minor, doesn’t matter if it’s a GE or an EMD. Almost always electrical problems or a computer/radio/data issue. One look in the electrical cabinet of a 4400hp AC locomotive and I’m actually surprised there aren’t a lot more defects, that is a lot of stuff going on, a mind boggling amount of wiring, harnesses, relays etc. All of it ultimately controlled by a computer and sometimes those go bad, or there are software faults. More often than not dropping the breakers and hard rebooting will clear things up, but when it doesn’t you are in for a shit show.
The big medium speed diesels are shockingly durable and reliable considering what they do every day. If new ones do have issues it’s usually a loose connection in the high pressure side of the fuel lines. If you ever see one go by with damage to the long hood that has burned the paint off 99% of the time at some point the high pressure side of the fuel rail has sprung a leak back by the turbo and gotten hot enough to light off a fuel fire. Very rare to see a new motor have hard parts failures, but eventually things will break. I’ve had turbochargers blow up, rods let go, and once even had a rod bearing go bad and spin on the rod journal of a crank and grind it down until it split in two. Threw the rod out of the block at an access hatch and I got some good photos of it.
Electric traction motors are also a common point of failure, they’ll give you a bit of warning if you pay attention but often just suddenly give out. Worse yet is if the bearings in the pinion gear or armature go bad and lock up an axle. That is pretty much the end of your day, it will take hours to get that locomotive set out somewhere at walking speed. Destroys the wheels, last time we had maybe a 9” flat spot on the wheel by the time we got it set out. Otherwise they torch out the pinion so the wheel will turn freely but that is $30K bill to fix the damage from torching it vs turning the wheels down or slamming a new axle and wheels in.
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