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[ESS 1.5] Union Pacific EMD SD90MAC-H2

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Union Pacific Collection: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2748808481


EMD released the SD90MAC in 1995 along with the SD80MAC as heavy duty locomotives. The SD80MAC utilized a 20 Cylinder EMD 710 Engine while the SD90 used a brand new 16 cylinder 265H engine. The SD90MAC could produce around 6000 Horsepower making it the strongest single engine diesel locomotives and one of the strongest single framed locomotives behind the DDA40X. When the SD90MAC was first shipped, EMD was having problems with the reliability of the 265H engine. They opted to release them with the 16 cylinder 710 engine making 4300 Horsepower and would offer the option for railways to refit them with the 265H engine when it was finished. These were known as the SD9043 by some railroads. When the SD90MAC finally released with it's proper engine, they were known as the SD90MAC-H. Later revisions of the MAC included the Phase II cab and these were known as the SD90MAC-H2. Even though the engine was released, it was still not tried and tested into perfection leading to lots of reliability issues with the engine. The locomotive was not popular as only large lines could afford them and it was more effective to use multiple units than one large locomotive. Eventually the SD90MAC ceased production and all units were either sold to EMD to become leasing units or rebuilt into SD70ACus. There are no more SD90MACs remaining, however the SD70ACu, the SD90MAC refitted with the 16 cylinder EMD 710 engine still remains on some railroads.


Open the fuse cabinet, Located on the back wall of the cab and flip all breakers on. Then flip the "Battery Knife Switch" in the electrical cabinet in the short hood of the locomotive, hit the "Engine Run" "Generator Field" and "Fuel Pump" switches on the control stand, then hold the "Auto Start" button on the rear wall of the cab until the "Engine Running" Indicator is lit, switch the dynamics to Cut In. Isolate the engine, hit the reverser buttons in whatever direction you desire, "1" being backward "2" being neutral and "3" being forward, and your ready for operation.


Very important to read this, as a lot has changed. Basics have stayed the same. Engine run switch on means the locomotive is a master. if its off its a slave. Now the motor polarity is controlled by the headlight controller. Use the arrow buttons to cycle through modes. THIS MUST BE DONE FOR ALL LOCOMOTIVES THAT ARE IN THE TRAIN! Long hood forward means the locomotive is not inverted, while short hood forward reverses the polarity. Use front/intermediate for master locomotives and/or Distributed Power Units. Use Middle for locomotives that are between two or more other locomotives in the front end power. [the main cluster of locomotives at the front of the train is the head end power] Use tail for locomotives at the end of the front end power. When master is on, the controls will reset to front unit. For Distributed Power Units or if you just don't like using connectors, enable the "receive from radio signal". Make sure all locomotives are set to the same frequency. Distributed Power Units should be set to front/intermediate unit. A properly hooked up train will allow the master to control the frontmost headlights and rearmost headlights of the front end power.


Speyguy's 1x1 Configurable Digital Speedometer - https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2758816083