Kushy,
Nothing's completely simple. If you are switching your own train, it is not a violation of the agreement.
So, contrary to what many crew members argue, you, a road crew, can be ordered to make up your own train or dispose of your own equipment. This means a yardmaster can order you to bring your train into the yard, place a car here, a car there, drop the hack on The Stink and put your engine on the Big Middle and he is not violating the agreement. You are switching your own train.
Even if a yard crew is on duty, a road crew can be ordered to handle its own train without a penalty.
However, if he told you to "leave your train on three, step over to five, pull it out and put a car to one and the rest back to five, then pin ahead (go home)," he would be violating the agreement because drilled equipment that you did not operate on the road.
These complexities get shuffled around from time to time and once in awhile a crew is paid when they should not be which just serves to further confuse the workforce.
But any yardmaster or experienced crew member knows exactly what he can and can't do without a penalty.
In the case you describe, the yardmaster or enginehouse foreman should send a CE -"change engine" engineer, who would not get a penalty for that kind of work. Of course if his CE was busy waxing the yardmaster's car [ -- oops -- couldn't resist -- ] and he had to send a yard crew or a hostler, they would receive the penalty payment.
Now if you "comingled" diesel and electric equipment -- handled a DE and then a DM... that would be another story, and of course, another day's pay.
Clem
P.S. -- Look there real hard at Greenwood's numbers. That's one heck of a tax bill. In New York, the state tax would be about $5600. That extra day's pay at straight time that you missed your kid's softball game to work woun't even buy you a nice dinner after taxes.