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HO Scale Athearn 91638 UP Union Pacific SD45T-2 Diesel Engine #4945
Part Number: 91638 UP Union Pacific SD45T-2 Diesel Engine #4945
- Factory Painted
- Paperwork includes diagram
- Spare parts bag included
- Track Tested and runs well
- Original Box Included
- Used so there is no factory warranty
- Prototype specific details applied
- Super detailed fuel tank
- Sliding cab windows
- Factory installed Celcon handrails
- See-through radiator fans, dynamic intake grills and exhaust stack
- Equipped with Quick Plug DCC technology
- Next-generation drive mechanism with hex drive lines
- Directional headlights
- Machined RP25 profile metal wheels
- Magnetically operated knuckle couplers
Overview
The SD45T-2 was developed to address unique operational concerns on the Southern Pacific Railroad. Numerous tunnels and snow sheds in the High Sierra were causing operational problems for their locomotives, especially accumulation of exhaust gases and excessive heat, commonly resulting in severe overheating or shut down. After extensive testing, Southern Pacific solved this problem by moving the radiator intakes to just above the running boards, creating what we now refer to as a 'tunnel motor'.
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