I'm familiar with Speno rail grinders but not Loram.
As a young" green " brakeman I was part of a crew in train order territory protecting the work. We had a SW (1300) equipped with some type of special cruise control to keep a steady grinding speed.... Caboose and a full crew ..
The scary part... I had to flag an hot freight , stop him and bring him into the work limits. I had never flagged anything before and I didn't have much time to get out the proper distance , get the torpedoes down and find a spot on straight track where the enginemen could see the my flag from a distance. I can hear him coming in the distance.
Along comes the train. mostly cars of paper and lumber... Guns go off,, Hogger gives 2 on the horn . and most of the train goes by me .
And of course the hogger curses me out for not being out far enough. yep scary at the time.