I concur with DRN. There is no longer a way to manually add substances into a trains air system. Some locomotives have been equipped, in the past, with a compressor mounted injection system, in an attempt to add "anti-freeze" protection, or lubricants, into the compressed air. The law now mandates that Railroads shall be responsible for KNOWING that the air brake system has been drained, and is free of water and contaminants, on all locomotives, and compressed air sources. It is now the law (although most don't know, or care) that the locomotive air reservoirs must be drained, or known to be free of water, by EVERY employee assigned to a train, using those locomotives. The brakeman, and even the student now carry the same burden of responsibility, in knowing the compressed air system is functioning, and free of water or contaminants. Failure to drain those reservoirs, when taking charge of locomotives, carries a rather hefty fine, for the "willful violation" of failure to drain those reservoirs. All employees on that job now carry the same burden, of paying that fine, not just the engineer. (a willful violation means you got on the power, and started to use it, without draining the reservoirs, or observing each auto-drain valve, and seeing it function as intended.) Regards
