got called for a grain train that weighed over 16,000 tons. We had 3 motors on the head end and 3 in the middle. When we came on duty it was tied down "second out" on Main 2." The van ran us out there. A note on the conductor's desk said, "power plus 13 or 14." My engineer and I thought that was an excessive amount of brakes, even for a 16,000 ton train. It's pretty flat there. I released the brakes and we were on our way. Even though our HPT was only 1.5, and we were going 15 MPH uphill, we made it to Barstow in pretty good time. Before we got there they told us that we would be "flipped." They told us to to our train down on Main 1, leave room for one, and go to the roundhouse to get another motor and "tack it on" to the head end of our train. They didn't tell us to do the "Locomotive Air Brake Test," link the DP and do the Class III. The motor was on "Ready 4." We got permission to come out. Since it was facing the wrong direction we would have to go "around the balloon." They stopped us at the pullback, and told us to go out the "north entrance to receiving and shove back to our train." My engineer and I were both confused, we clarified it with the router. We would have to go up R11, and out the west rentrance to the Receiving Yard onto the Mohave Connector, and shove bakc to our train. I had never done a move like this before and neither had my engineer. Since it was just one motor I didn't have to ride the steps but I did anyway. It was cold! We had to flag one signal. I shoved us back to a hook, laced the hoses, connected the MU cable, and cut the air in. We were done. A yard van took us back to the terminal. The other crew that we were supposed to share the van with was there, so we piled into the van and it took us to Needles. I tied up after 2 am. I'm not showing out again in the next 24 hours. Hopefully I will be able to get my free breakfast at Denny's tomorrow.