I took the YPR - Puri Garib Rath last Sat and at BZA took my kids along to watch the Loco change.
I was surprised to see the Loco being changed was WDG - 3A and questioned one of the engineers participating in the Loco change about the Loco being used for a Passenger train.
[As there was lots of noise, its possible I misheard and misunderstood the following conversation, experts pls correct]
He...
more... explained that this Loco has both Speed Pipe [White Colour] and Brake Pipe [ Green colour] and hence can be used to pull passenger coaches. A Goods only Loco will have only the Brake Pipe.
Is it really the case? Also the 2nd Loco was a WAM - 4 [I think] and I noticed FP and BP painted over the pipes. FP for Speed Pipe?